Co-reporter:Fei Wang;Feng Ren;Peng Mu;Zhaoqi Zhu;Hanxue Sun;Chonghua Ma;Chaohu Xiao;Weidong Liang;Lihua Chen
Journal of Materials Chemistry A 2017 vol. 5(Issue 22) pp:11348-11356
Publication Date(Web):2017/06/06
DOI:10.1039/C7TA02982A
Herein, two conjugated microporous polymers (CMPs) containing dual heteroatoms (named as CMPSNs) were synthesized using 4,7-dibromobenzo[c][1,2,5]thiadiazole and alkynyl monomers as the building blocks though a Sonogashira–Hagihara cross-coupling reaction for the efficient removal of antibiotics from water. Fourier transform infrared spectroscopy (FT-IR), 13C CP/MAS solid-state NMR, ultraviolet (UV) adsorption spectroscopy and fluorescence spectroscopy were used to confirm the structure of the resulting CMPSNs. Under our synthesis conditions, CMPSNs with interesting morphologies were obtained, where the macroscopically porous network structure was composed of aggregated hierarchical micrometre-sized microporous spheres. Employing tetracycline as a model antibiotic, for the first time, the performance of the CMPSNs for the removal of tetracycline from water was systematically investigated. The results of the adsorption kinetics of tetracycline showed that the adsorption mechanism of the resulting polymers followed a pseudo-second-order model. Moreover, the adsorption behaviour of CMPSNs for tetracycline fitted well with the Freundlich model. In addition, the adsorption thermodynamics indicated that the adsorption is an endothermic process, and it was also found that the temperature was beneficial to the adsorption and that the adsorption process was spontaneous. The findings obtained from this work make the CMPSNs promising candidates for the capture of tetracycline, which may open a new opportunity to address certain environmental issues, especially from the global-scale severe water pollution arising from antibiotics.
Co-reporter:Xin Qian, Bing Wang, Zhao-Qi Zhu, Han-Xue Sun, Feng Ren, Peng Mu, Chonghua Ma, Wei-Dong Liang, An Li
Journal of Hazardous Materials 2017 Volume 338(Volume 338) pp:
Publication Date(Web):15 September 2017
DOI:10.1016/j.jhazmat.2017.05.041
•N-rich porous organic polymers (POPs) were synthesized.•The POPs show the highest iodine uptake of up to 382 wt%.•The POPs shows great potential in the removal of radioactive iodine at different states.•The POPs have remarkable adsorption performance and excellent recycling percentage after three times cycle.The imino group-contained porous organic polytriphenylamine, which originated from diphenylamine and 1,3,5-tris(4-bromophenyl)benzene, was designedly synthesized though Buchwald-Hartwig coupling reaction. The basic properties including morphologies, structure and thermal stability of the resulting POPs were investigated by scanning electron microscope(SEM), thermo gravimeter analysis (TGA), 13C CP/MAS solid state NMR and Fourier transform infrared spectroscope (FTIR). The pore size distribution of POPs present uniform mesoporous of sizes less than 50 nm. Scanning electron microscope images show that the resulting POPs formed as an aggregation composed of nanospheres. The POPs were employed as a physicochemical stable porous medium for removal of radioactive iodine and an iodine uptake of up to 382 wt% was obtained. To our knowledge, this is one of the highest adsorption value reported to date. Based on these findings, the resulting POPs shows great potential in the removal of radioactive iodine at different states, through a green, environmentally friendly, and sustainable way.Download high-res image (246KB)Download full-size image
Co-reporter:Feng Ren, Zhaoqi Zhu, Xin Qian, Weidong Liang, Peng Mu, Hanxue Sun, Jiehua Liu and An Li
Chemical Communications 2016 vol. 52(Issue 63) pp:9797-9800
Publication Date(Web):07 Jul 2016
DOI:10.1039/C6CC05188J
Two conjugated microporous polymers containing thiophene-moieties (SCMPs) were obtained by the polymerization of 3,3′,5,5′-tetrabromo-2,2′-bithiophene and ethynylbenzene monomers through the palladium-catalyzed Sonogashira–Hagihara crosscoupling reaction. The resulting SCMPs show high thermal stability with a decomposition temperature above 300 °C. Scanning electron microscopy images show that the resulting SCMPs formed as an aggregation composed of micrometer-sized SCMP spheres, in which honeycomb-like porous spheres with penetrated pores on the surface were observed. Taking advantage of such a unique honeycomb-like porous morphology as well as π-conjugated structures, the SCMPs show ultrahigh absorption performance for iodine vapour with an uptake of up to 345 wt% obtained, which is the highest value reported to date for CMPs, thus making the resulting SCMPs ideal absorbent materials for reversible iodine capture to address environmental issues.
Co-reporter:Xin Qian, Zhao-Qi Zhu, Han-Xue Sun, Feng Ren, Peng Mu, Weidong Liang, Lihua Chen, and An Li
ACS Applied Materials & Interfaces 2016 Volume 8(Issue 32) pp:21063
Publication Date(Web):July 26, 2016
DOI:10.1021/acsami.6b06569
Conjugated microporous polymers having thiophene building blocks (SCMPs), which originated from ethynylbenzene monomers with 2,3,5-tribromothiophene, were designedly synthesized through Pd(0)/CuI catalyzed Sonogashira–Hagihara cross-coupling polymerization. The morphologies, structure and physicochemical properties of the as-synthesized products were characterized through scanning electron microscope (SEM), thermogravimeter analysis (TGA), 13C CP/MAS solid state NMR and Fourier transform infrared spectroscope (FTIR) spectra. Nitrogen sorption–desorption analysis shows that the as-synthesized SCMPs possesses a high specific surface area of 855 m2 g–1. Because of their abundant porosity, π-conjugated network structure, as well as electron-rich thiophene building units, the SCMPs show better adsorption ability for iodine and a high uptake value of 222 wt % was obtained, which can compete with those nanoporous materials such as silver-containing zeolite, metal–organic frameworks (MOFs) and conjugated microporous polymers (CMPs), etc. Our study might provide a new possibility for the design and synthesis of functional CMPs containing electron-rich building units for effective capture and reversible storage of volatile iodine to address environmental issues.Keywords: conjugated microporous polymers; iodine uptake; porosity; storage; thiophene
Co-reporter:Weidong Liang, Ye Wu, Hanxue Sun, Zhaoqi Zhu, Pinsong Chen, Baoping Yang and An Li
RSC Advances 2016 vol. 6(Issue 24) pp:19669-19675
Publication Date(Web):01 Feb 2016
DOI:10.1039/C5RA27964J
Superhydrophobic PDMS–HNTs (halloysite clay nanotubes) were prepared by the surface modification of purified HNTs (p-HNTs) with polydimethylsiloxane (PDMS). The strong hydrophobic properties and distinctive structure of PDMS–HNTs, resulting from the hollow and tubular structure of p-HNTs, have led to their use as supporting materials in the preparation of form-stable phase change material (PCM) composites, into which PCMs can be easily adsorbed and remain stable without leakage even at temperatures greater than the melting points of the PCMs. The PCMs were loaded at the outer and inner surfaces of PDMS–HNTs, and as a result of their incorporation, the latent heats of the PDMS–HNTs/PCMs composites were measured to be in the range of 44.7–72.1 kJ kg−1. Taking advantage of the simple process, low cost and excellent thermal stability, the PDMS–HNTs/PCM composites may have great potential for practical applications as solar energy storage systems.
Co-reporter:Peng Mu;Hanxue Sun;Zhaoqi Zhu;Weidong Liang;Jiehua Liu
Macromolecular Materials and Engineering 2016 Volume 301( Issue 4) pp:451-456
Publication Date(Web):
DOI:10.1002/mame.201500383
Co-reporter:Chunli Zheng, Miaomiao Du, Shanshan Feng, Hanxue Sun, An Li, Chi He, TianCheng Zhang, Qiaorui Wang, Wei Wei
Applied Surface Science 2016 Volume 364() pp:15-20
Publication Date(Web):28 February 2016
DOI:10.1016/j.apsusc.2015.12.083
Highlights
- •
It was firstly found that hydrophobic conjugated microporous polymers (CMPs) removed protein from water with a relatively higher efficiency compared with other sorbents.
- •
The surface properties of CMPs have an obvious effect on the rate and extent of protein sorption. Since the synthesis of CMPs is easy, the structure and surface areas of CMPs can be tuned, promotion in sorption will be anticipated.
- •
The sorption capacity of regenerated CMPs toward protein can be highly enhanced and enlarged compared with freshly made CMPs.
- •
This research may open an opportunity to address the environmental issues especially for the global scale of protein-loaded water pollution arising from food industry.
Co-reporter:Lulu Bao, Hanxue Sun, Zhaoqi Zhu, Weidong Liang, Peng Mu, Jiake Zang, An Li
Materials Letters 2016 Volume 178() pp:5-9
Publication Date(Web):1 September 2016
DOI:10.1016/j.matlet.2016.04.195
•Tubular conjugated microporous polymers with high purity were synthesized.•The ratio of momoners has an influence on the morphology of the resulting polymers.•The porosity of the polymers can be tuned by varying the ratio of monomers.The functional N-bearing conjugated microporous polymers (NCMPs) were synthesized by conventional palladium-catalyzed Sonogashira-Hagihara coupling polymerization. The molar ratio of alkyne to halogen functionalities has a significant influence on the thermal stability, morphology and porosity of the resulting polymers. The thermal stability and special surface areas as well as total pore volumes of the resulting polymers was enhanced with the increase of the molar ratio and the surface area reached up to 760 m2 g−1. Taking advantages of their amine functionalization and excellent physical and chemical properties, the NCMPs show great potential applications in CO2 storage. This work is expected to provide fundamental guide for the design of novel functional tubular CMPs materials by tuning the molar ratio of arylethynylenes to aryl halides and expanding their applications such as gas storage and separation.
Co-reporter:Jiake Zang, Zhaoqi Zhu, Hanxue Sun, Weidong Liang, An Li
Reactive and Functional Polymers 2016 Volume 99() pp:95-99
Publication Date(Web):February 2016
DOI:10.1016/j.reactfunctpolym.2015.12.016
Novel and functional conjugated microporous polymers (PCMPs) with pyridine units in networks were synthesized from arylethynylenes and 2,6-bis(bromomethyl) pyridine by palladium-catalyzed Sonogashira–Hagihara crosscoupling chemistry. The resulting PCMPs exhibit good chemical and thermal stability with decomposition temperature above 400 °C. The choice of ethynyl monomer has an obvious influence on the specific surface areas of the resulting CMPs. A high BET surface area of 1136 m2 g− 1 was achieved. Taking advantages of the good physicochemical stability and excellent porosity, the functional CMPs networks show superior adsorption performance for CO2 with uptake up to 109.0 mg g− 1. Given the excellent porosity and gas uptake as well as good physiochemical stability, the as-synthesized PCMPs show great potentials in CO2 uptake. Our study may provide fundamental guidance in designing new CMPs-based materials for the application in CO2 capture and storage.
Co-reporter:Peng Mu, Hanxue Sun, Jiake Zang, Zhaoqi Zhu, Weidong Liang, Fucheng Yu, Lihua Chen, An Li
Reactive and Functional Polymers 2016 Volume 106() pp:105-111
Publication Date(Web):September 2016
DOI:10.1016/j.reactfunctpolym.2016.07.009
A series of conjugated microporous polymers (CMPs) were synthesized via palladium-catalyzed Sonogashira-Hagihara crosscoupling polycondensation of N,N-bis(4-bromobenzyl)amine and 1,3,5-triethynylbenzene in different ternary solvents. The globular, tubular and amorphous CMP networks with different BET (Brunauer-Emmett-Teller) surface areas were obtained. Take advantages of superhydrophobic/oleophilic properties and microporous morphological structures of the resulting CMPs, a CMPs-based mesh film and a flexible, superhydrophobic, transparent CMPs-based film were prepared, which exhibit good oil/water separation performance and moderate transmittance. In addition, due to its abundant porous feature and unique chemistry nature of the as-prepared N-containing CMPs, the removal of the dyes from water and iodine from organic solvent have been investigated. The results show that the CMP-3 possesses the highest adsorption capacities of 269 mg g− 1 for rhodamine B, 198 mg g− 1 for methyl orange and 218 mg g− 1 for iodine, respectively. This work provides a useful guidance for design and construction of porous CMPs materials for special applications.
Co-reporter:Yingfan Chen, Hanxue Sun, Ruixia Yang, Tingting Wang, Chunjuan Pei, Zhentao Xiang, Zhaoqi Zhu, Weidong Liang, An Li and Weiqiao Deng
Journal of Materials Chemistry A 2015 vol. 3(Issue 1) pp:87-91
Publication Date(Web):06 Nov 2014
DOI:10.1039/C4TA04235B
Conjugated microporous polymer nanotubes (CMPNs) with a surface area of up to 1368 m2 g−1 were synthesized by a simple one-step crosscoupling reaction and employed as a platform for investigation of CO2 and I2 adsorption. A high adsorption capacity of up to 208 wt% for reversible I2 capture was achieved.
Co-reporter:Weidong Liang, Guodong Zhang, Hanxue Sun, Pinsong Chen, Zhaoqi Zhu, An Li
Solar Energy Materials and Solar Cells 2015 Volume 132() pp:425-430
Publication Date(Web):January 2015
DOI:10.1016/j.solmat.2014.09.032
•Nickel foam was coated with graphene nanosheets by the dip-coating method.•Graphene-coated nickel foam showed superoleophilic character with modification by PDMS.•The latent heat of PDMS–G–NF/PCM composites was 42.3–123.41 kJ kg−1.•The thermal storage of PCM composites can be improved up to 46%.Superoleophilic graphene–nickel foam (PDMS–G–NF), which was prepared by coating graphene nanosheets onto nickel foam followed by surface modification with polydimethylsiloxane (PDMS), was used as porous supporting material to prepare form-stable phase change materials (PCMs) composites. Owing to the strong hydrophobic and superhydrophilic wettability of PDMS–G–NF, PCMs can be absorbed spontaneously into PDMS–G–NF and can stay stable without leakage even over their melting points. The incorporation of PCMs into PDMS–G–NF does not change the crystal structure but lowers the crystallinity size of PCMs in the composites, which is confirmed by X-ray powder diffraction (XRD) analysis. The latent heat of PDMS–G–NF/PCM composites was measured in the range of 42.3–123.41 kJ kg−1. Taking advantages of the simple process and good stability the PDMS–G–NF should be ideal candidates as an alternative to traditional PCMs, which may have great potentials for renewable energy saving applications.
Co-reporter:Weidong Liang, Yuanrui Wang, Hanxue Sun, Pinsong Chen, Zhaoqi Zhu and An Li
RSC Advances 2015 vol. 5(Issue 127) pp:105319-105323
Publication Date(Web):26 Nov 2015
DOI:10.1039/C5RA21791A
Superwetting inorganic membranes or films have recently attracted considerable interest for the separation of oils or organics from water. In this work, attapulgite (ATP)-based films consisting mostly of ATP nano-crystals and cellulose fibers from wastepaper were fabricated by a suspension casting method. The as-synthesized ATP-based films exhibited good structural flexibility and tensile ability with σκ values of up to 6.14 MPa. After modification with PDMS, the surface wettability of the ATP-based films was tailored from being amphipathic to being superhydrophobic toward water and superoleophilic toward oils. Taking advantage of the simple fabrication, high mechanical stability and low cost, such superhydrophobic and superoleophilic ATP-based films could be used for the efficient separation of oily or organic contaminants from water and show great potential in such applications as purification, separation, oil spill cleanups and so on.
Co-reporter:Zhentao Xiang, Hanxue Sun, Zhaoqi Zhu, Weidong Liang, Baoping Yang and An Li
RSC Advances 2015 vol. 5(Issue 32) pp:24893-24898
Publication Date(Web):02 Mar 2015
DOI:10.1039/C5RA00437C
Tubular conjugated microporous polymers (CMPs) were synthesized by Pd(0)/Cu(I)-catalyzed Sonogashira–Hagihara cross-coupling polycondensation. Taking advantage of its unique tube-liked morphology as well as good chemical and physical properties, for the first time, tubular CMPs as fillers were used for the preparation of polymer composites with polymethyl methacrylate and polydimethylsiloxane as polymeric matrix using a simple solution method. The tensile fracture toughness of polymer composites was enhanced after addition of CMPs nanotubes with appropriate loading, which contributed to the good compatibility of the fillers to the polymer matrix on the micro level arising from the intrinsic surface superhydrophobicity of CMP-I nanotubes. Our study may provide guidance for the further development of CMPs nanotubes or CMPs nanofibers as fillers for fabrication of polymer composites.
Co-reporter:Hanxue Sun;Peiqing La;Zhaoqi Zhu;Weidong Liang
Journal of Materials Science 2015 Volume 50( Issue 22) pp:7326-7332
Publication Date(Web):2015 November
DOI:10.1007/s10853-015-9289-1
The capture of iodine using porous materials has attracted considerable interest. In this work, porous carbon with a special surface area of 1973 m2 g−1 was prepared by simple activation method. As an adsorbent, the adsorption capacity of the resulting porous carbon could reach up to 376 wt% for iodine vapor and 460 mg g−1 for iodine uptake in cyclohexane, which both are among the highest values reported up to now. Taking advantages of its high special surface area, easy preparation, low cost, as well as good regeneration, the resulting porous carbon shows great potential in the removal of radioactive iodine at different states.
Co-reporter:Qian Shi;Hanxue Sun;Ruixia Yang;Zhaoqi Zhu
Journal of Materials Science 2015 Volume 50( Issue 19) pp:6388-6394
Publication Date(Web):2015 October
DOI:10.1007/s10853-015-9191-x
Two novel CMPs networks with (A4 + B3) type and (A4 + B2) type were synthesized by Pb(II)/Cu(I)-catalyzed Sonogashira–Hagihara cross-coupling polymerization. The resulting CMPs show high thermal stability with a decomposition temperature above 300 °C. The CMPs exhibit high specific surface areas up to 788 m2 g−1. Using them as porous platforms, the CO2 adsorption of CMPs was investigated. Meanwhile, the synthesized CMPs show surface superhydrophobicity with water contact angle about 157° due to the microporous morphological structures and the strongly hydrophobic chemical compositions. The organic liquid uptake of CMPs samples was measured up to 1522 wt% for a variety of organic solvents. Furthermore, simply coating of the resulting CMPs on the stainless steel grid enables the wettability of grid changing from hydrophilicity to superhydrophobicity and superoleophilicity, which makes them potential candidates for selective adsorption of oils and organics from water.
Co-reporter:Qingtang Zhang, Songwang Ge, Xiaomei Wang, Hanxue Sun, Zhaoqi Zhu, Weidong Liang and An Li
RSC Advances 2014 vol. 4(Issue 78) pp:41649-41653
Publication Date(Web):28 Aug 2014
DOI:10.1039/C4RA05339G
A MnO/porous hard carbon (PHC) nanocomposite was prepared by thermolysis of the conjugated microporous polymer incorporated with Mn(CH3COO)2. The results obtained from scanning electron microscopy, transmission electron microscope and Brunauer–Emmett–Teller analysis show that MnO nanocrystals are uniformly dispersed in the PHC matrix. The rate performance of MnO/PHC electrode at current rates over 5 C is remarkably higher than that of MnO electrode. After 200 charge/discharge cycles, the capacity retention ratio of the MnO/PHC electrode still reaches up to 91.1%. Such a unique performance of the MnO/PHC nanocomposite makes it a promising candidate as an anode material for high performance lithium ion batteries.
Co-reporter:Wenjie Fan, Xuefei Liu, Zhen Zhang, Qijian Zhang, Wei Ma, Dazhi Tan, An Li
Microporous and Mesoporous Materials 2014 Volume 196() pp:335-340
Publication Date(Web):15 September 2014
DOI:10.1016/j.micromeso.2014.05.038
•Novel nanotube-like conjugated microporous polymer (CMP) was prepared.•CMP nanotube-based hydrophobic melamine sponges via “ship-in-bottle” technology.•CMP treated sponges exhibit excellent absorption capacity for oils and organics.•The absorbates can be re-collected simply by squeezing the treated sponge.Novel nanotube-like conjugated microporous polymer (CMP) with a large surface area was prepared by one-step chemical synthesis via cross-coupling of 1,4-diethynylbenzene and 2,4,6-tribromophenol. Due to its unique surface hydrophobicity and porous feature, we prepared CMP nanotube-based hydrophobic sponges by filling the CMP nanotubes into melamine sponges to afford a bulk absorbent via the method similar to “ship-in-bottle”. The CMP treated sponges exhibit excellent absorption capacity and recyclability for separation of organics from water. Moreover, the absorbates can be re-collected simply by squeezing the treated sponge. This work provides a simple and efficient method to prepare hydrophobic, oleophilic sponge materials, which is of technological significance for potential use, especially for oil-spill cleanups or removal of organic pollutants from water.
Co-reporter:Chunjuan Pei, Hanxue Sun, Zhaoqi Zhu, Weidong Liang, Jin An, Qingtang Zhang and An Li
RSC Advances 2014 vol. 4(Issue 27) pp:14042-14047
Publication Date(Web):07 Mar 2014
DOI:10.1039/C3RA48079H
A novel three-dimensional nanostructured porous graphene nanocomposite was synthesized by sol–gel polymerization of hydroquinol (H) and formaldehyde (F) with sodium carbonate as a catalyst in graphene oxide (GO) suspension, followed by carbonization of HF and thermal reduction of GO to graphene at high temperature. The resulting material shows a BET surface area of 427 m2 g−1 and a total volume of 1.2764 cm3 g−1 with abundant mesopores. The porous graphene nanocomposite (HFG) can be used as anode for lithium ion batteries due to the porosity and thermal stability. Also, with the strong surface hydrophobicity, high mesopore ratio and pore volume, the HFG shows good absorption capacity for various organics, which makes the HFG a candidate for removal of organic contaminants from water.
Co-reporter:Xue-Mei Bao, Jin-Feng Cui, Han-Xue Sun, Wei-Dong Liang, Zhao-Qi Zhu, Jin An, Bao-Ping Yang, Pei-Qing La, An Li
Applied Surface Science 2014 Volume 303() pp:473-480
Publication Date(Web):1 June 2014
DOI:10.1016/j.apsusc.2014.03.029
Highlights
- •
We used a novel method for fabrication of superhydrophobic surfaces by coating metal oxide nanoparticles on various substrates.
- •
The PDMS-treated metal oxide nanoparticles show superhydrophobicity.
- •
The wettabilities of treated substrates can be changed from hydrophilic to superhydrophobic.
- •
The as-treated sponge can move on the surface of water by moving external magnetic field.
Co-reporter:Hanxue Sun, Zhaoqi Zhu, Weidong Liang, Baoping Yang, Xiaojuan Qin, Xinhong Zhao, Chunjuan Pei, Peiqing La and An Li
RSC Advances 2014 vol. 4(Issue 58) pp:30587-30591
Publication Date(Web):03 Jul 2014
DOI:10.1039/C4RA03208J
Superwetting materials have attracted considerable interest both in academia and industry. In this work, the reduced graphene oxide (RGO)-coated cotton (GCC) was prepared by a facile and inexpensive dip-coating method. By modification with polydimethylsiloxane (PDMS), superhydrophobic and superoleophilic GCC was obtained, which shows a water contact angle of 152°. The PDMS-treated GCC exhibits selective absorption of organics and oils from water with an absorption capacity up to 11 to 25 times its weight. Also, the as-prepared product shows excellent stability and recyclability; both saturated absorption capacity and water CA value remain nearly unchanged after 9 cycles of use. Taking advantage of the excellent absorption selectivity, simple fabrication process, good stability and recyclability, this material may find a variety of applications such as in water treatment, purification, separation, oil spill cleanups and so on.
Co-reporter:Qingtang Zhang, Songwang Ge, Hongtao Xue, Xiaomei Wang, Hanxue Sun and An Li
RSC Advances 2014 vol. 4(Issue 102) pp:58260-58264
Publication Date(Web):30 Oct 2014
DOI:10.1039/C4RA10206A
A fayalite (α-Fe2SiO4)@C nanocomposite is successfully fabricated by a solid state reaction under the flow of nitrogen gas. The fayalite@C nanocomposite delivers a high specific capacity, excellent rate capability and good cycling performance as an anode material for lithium ion batteries (LIB). The initial discharge capacity and reversible charge capacity of the fayalite@C nanocomposite at 0.1 C reach up to 849.0 mA h g−1 and 514.5 mA h g−1, respectively. The capacity ratio of 2 C/0.5 C is 90% indicating the excellent rate performance of the fayalite@C anode. In addition, the fayalite@C anode retains 84.3% of its original capacity after 100 cycles at 1 C. Taking into account the low cost and simple fabrication process, this kind of abundant mineral silicate has great potential for next generation LIB.
Co-reporter:Weidong Liang, Pinsong Chen, Hanxue Sun, Zhaoqi Zhu and An Li
RSC Advances 2014 vol. 4(Issue 73) pp:38535-38541
Publication Date(Web):12 Aug 2014
DOI:10.1039/C4RA04662E
Spongy attapulgite (s-ATP), a novel nanoporous material with a three-dimensional porous network, was assembled from purified attapulgite micropowder (p-ATP) and used as a host material to prepare composite form-stable phase change materials (PCMs). The average pore diameter of the spongy ATP network was measured as 13.3 nm and the pore walls consist of thin layers constructed of ATP nanorod-like crystals. Due to the capillary forces of spongy ATP, n-carboxylic acids can be easily absorbed into ATP samples by the vacuum method. The effects of the three-dimensional network structure of the supporting material on the thermal properties of the composites were investigated. The thermal energy storage, thermal stability and durability of the composite PCMs were tested by differential scanning calorimetry and thermogravimetry. The PCM/spongy ATP composites had a high heat storage capacity between 72.57 and 82.36 J g−1, corresponding to a mass fraction of n-carboxylic acids between 36.60% and 37.71%. The PCM/spongy ATP composites exhibited excellent thermal stability and durability, and may have great potential for renewable energy storage applications.
Co-reporter:Jin-Feng Cui;Xue-Mei Bao;Han-Xue Sun;Jin An;Jun-Hong Guo;Bao-Ping Yang
Journal of Applied Polymer Science 2014 Volume 131( Issue 2) pp:
Publication Date(Web):
DOI:10.1002/app.39767
ABSTRACT
Cauliflower-like polyaniline (PANI) was successfully prepared using an interfacial polymerization method. By modification with polydimethylsiloxane (PDMS) using chemical vapor deposition method, the surface wettability of cauliflower-like PANI can be tailored to be superhydrophobic with a water contact angle of 160.4°. The deposition of the low-surface-energy silicon coating originated from PDMS pyrolysis on the cauliflower-like PANI was confirmed by X-ray photoelectron spectroscopy and Fourier Transform Infrared Spectroscopy. The changes in thermal stability and conductivity of the as-prepared PANI before and after PDMS treatment were also investigated by thermogravimetric analysis and using a four-probe method. Compared with nanofiber-shaped PANI by electrodepositing polymerization, the PDMS-treated cauliflower-like PANI has superior surface wettability. Our study may open a new way for fabrication of superhydrophobic surfaces by developing novel nanostructured PANI. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39767.
Co-reporter:Jin An;Jin-Feng Cui;Zhao-Qi Zhu;Wei-Dong Liang;Chun-Juan Pei;Han-Xue Sun;Bao-Ping Yang
Journal of Applied Polymer Science 2014 Volume 131( Issue 18) pp:
Publication Date(Web):
DOI:10.1002/app.40759
ABSTRACT
Here, we reported the preparation of hydrophobic mesh films by coating conductive polymers including polyaniline and polypyrrole (PPy) onto stainless steel grid through a simple electrodepositing process by combination with modification of hydrophobic materials. The hydrophobic mesh films can be used for continual separation of oils and organics from water with high selectivity. Furthermore, mesh film with reversible switching wettability from hydrophobicity to hydrophilicity can be obtained by electrodepositing of PPy in the presence of perfluorooctanesulfonate dopants at different electric potential, which makes it possible to prepare functional mesh materials with remotely controllable surface wettability for selective absorption and purification. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40759.
Co-reporter:Hanxue Sun;Peiqing La;Zhaoqi Zhu;Weidong Liang
Journal of Materials Science 2014 Volume 49( Issue 20) pp:6855-6861
Publication Date(Web):2014 October
DOI:10.1007/s10853-014-8387-9
In this work, we synthesized p-phenylenediamine modified carbon nanotubes (P-CNTs) by diazotization reaction. The resulting material shows a BET surface area of 285 m2 g−1 and a total volume of 0.65 cm3 g−1 with abundant mesopores. Also, the P-CNTs exhibit good surface hydrophobicity with water contact angle of 140.8°, which should be attributed to the cooperation of both surface roughness and hydrophobic chemical compositions (aromatic rings linkages) of P-CNTs. Taking advantages of the intrinsic porosity and surface hydrophobicity, the resulting P-CNTs exhibit a notably selective absorbing ability and good recyclability for removal of organics and oils from water, which makes them the promising candidates for liquid–liquid separation and waste oil treatment.
Co-reporter:Jin An;Hanxue Sun;Jinfeng Cui;Zhaoqi Zhu;Weidong Liang
Journal of Materials Science 2014 Volume 49( Issue 13) pp:4576-4582
Publication Date(Web):2014/07/01
DOI:10.1007/s10853-014-8157-8
The low stability and complicated fabrication procedures seriously hindered practical applications of superhydrophobic and superoleophilic materials. Here, we present a simple method for preparing the novelly three-dimensional material based on commercially available nickel foams functionalized with electrodepositing of sub-micrometer polypyrrole (PPy) particles, followed by modification of low-surface-energy material such as fluoroalkylsilane (FAS), which can efficiently separate oils and organic solvents from water. The formation of nanostructured surface roughness of PPy onto the nickel foam by combination with FAS modification would contribute to the excellent superhydrophobic and superoleophilic performance, as is the evidence of the water CA of 155° and oil CA of ca. 0° for FAS-treated PPy foam. As a separating membrane, organic solvents and oils could be easily removed without obvious absorption of water, which has great potential over traditional treatment techniques and is of technological significance as a promising and efficient absorbent material for separation of organic contaminates and oils from water.
Co-reporter:Dazhi Tan, Wannan Xiong, Hanxue Sun, Zhen Zhang, Wei Ma, Changgong Meng, Wenjie Fan, An Li
Microporous and Mesoporous Materials 2013 Volume 176() pp:25-30
Publication Date(Web):August 2013
DOI:10.1016/j.micromeso.2013.03.018
Highlights•Film and nanotube-like conjugated microporous polymers (CMPs) were synthesized.•The morphology of CMP networks is greatly affected the structure of monomers.•The CMPs are promising absorbent materials for adsorption of organic contaminants.Conjugated microporous polymer (CMP) composed of alternative phenylene and ethynylene units with film and nanotube-like morphologies were synthesized by 1,3,5-triethynylbenzene with 1,4-dibromobenzene and 1,3,5-tribromobenzene with 1,4-diethynylbenzene, respectively. Our work reveals that the morphology of CMP networks is greatly affected by the structure of monomers. We also investigated the wettability of the as-prepared CMP samples and their adsorption performance for organic solvents. The CMP samples show good surface superhydrophobicity and large BET surface area and pore volumes, making them the promising absorbent materials for separation and selective adsorption of organic contaminants or oil spills from water.Graphical abstract
Co-reporter:Weidong Liang, Guodong Zhang, Hanxue Sun, Zhaoqi Zhu and An Li
RSC Advances 2013 vol. 3(Issue 39) pp:18022-18027
Publication Date(Web):02 Aug 2013
DOI:10.1039/C3RA42777C
Conjugated microporous polymers (CMPs) with large BET surface areas were used as porous supporting materials to prepare form-stable phase change material (PCM) composites. Due to the unique superoleophilicity of CMPs, PCMs could be absorbed spontaneously into CMPs and can stay stable in the CMP samples without leakage even over their melting points. Results obtained from X-ray powder diffraction (XRD) show that the incorporation of CMPs decreases the crystal size of PCMs in the composites. The latent heat of CMP/PCM composites was measured ranging from 103.3 kJ kg−1 to 171.0 kJ kg−1. The resulting PCM composites show excellent recyclability and thermal stability after 300 melting and freezing cycles, and have great potential for renewable energy saving applications.
Co-reporter:Hanxue Sun; An Li;Xiaojuan Qin;Zhaoqi Zhu;Dr. Weidong Liang;Jin An; Peiqing La; Weiqiao Deng
ChemSusChem 2013 Volume 6( Issue 12) pp:2377-2381
Publication Date(Web):
DOI:10.1002/cssc.201300319
Abstract
Superwetting membranes or porous absorbent materials have recently attracted considerable interest from both commercial and academic communities due to their excellent performance for separation or selective absorption of organic compounds and oils from water, which shows great potential for addressing environmental issues. Herein, the first example of engineering a commercially available stainless-steel grid based on the assembly of graphene for the fabrication of superwetting mesh films (SMFs) is reported. An excellent surface wettability of the SMFs, which exhibit a unique adhesion force to liquids, is observed; this makes it possible to transfer small quantities of liquid samples to perform microsample analysis. A three-dimensional SMF shows unprecedented performance in the separation, transportation, and selective absorption of organic compounds or oils from water. The performance is considerably improved in comparison to traditional separation/absorption technologies and may useful for a wide range of applications such as purification, water treatment, or oil-spill cleanup.
Co-reporter:Hanxue Sun; An Li;Zhaoqi Zhu;Dr. Weidong Liang;Dr. Xinhong Zhao; Peiqing La; Weiqiao Deng
ChemSusChem 2013 Volume 6( Issue 6) pp:1057-1062
Publication Date(Web):
DOI:10.1002/cssc.201200979
Abstract
Highly porous activated carbon with a large surface area and pore volume was synthesized by KOH activation using commercially available activated carbon as a precursor. By modification with polydimethylsiloxane (PDMS), highly porous activated carbon showed superhydrophobicity with a water contact angle of 163.6°. The changes in wettability of PDMS- treated highly porous activated carbon were attributed to the deposition of a low-surface-energy silicon coating onto activated carbon (confirmed by X-ray photoelectron spectroscopy), which had microporous characteristics (confirmed by XRD, SEM, and TEM analyses). Using an easy dip-coating method, superhydrophobic activated carbon-coated sponges were also fabricated; those exhibited excellent absorption selectivity for the removal of a wide range of organics and oils from water, and also recyclability, thus showing great potential as efficient absorbents for the large-scale removal of organic contaminants or oil spills from water.
Co-reporter:Dr. Zong-Liang Fan;Xiao-Juan Qin;Han-Xue Sun;Zhao-Qi Zhu;Chun-juan Pei;Wei-Dong Liang;Xue-Mei Bao;Jin An; Pei-Qing La; An Li; Wei-Qiao Deng
ChemPlusChem 2013 Volume 78( Issue 10) pp:1282-1287
Publication Date(Web):
DOI:10.1002/cplu.201300119
Abstract
Mesoporous graphene with a surface area of 306 m2 g−1 was synthesized by employing CaCO3 microspheres as hard templates. By surface modification with polydimethylsiloxane (PDMS) through chemical vapor deposition, the wettability of as-treated mesoporous graphene can be tailored to be superhydrophobic to water while superoleophilic to oils. The deposition of the low-surface-energy silicon-coating originated from PDMS pyrolysis on porous graphene was confirmed by X-ray photoelectron spectroscopy. As a result of its porous structures and excellent surface superhydrophobicity, the PDMS-treated mesoporous graphene exhibits good selectivity, excellent recyclability, and good absorption performance (up to 66 g g−1) for a wide range of oils and organic solvents. Thus, leading to potential use in a variety of applications such as water treatment and purification as well as cleanup of oil spills.
Co-reporter:Zhao-Qi Zhu, Han-Xue Sun, Xiao-Juan Qin, Lei Jiang, Chun-Juan Pei, Li Wang, Ying-Qiu Zeng, Shu-Hao Wen, Pei-Qing La, An Li and Wei-Qiao Deng
Journal of Materials Chemistry A 2012 vol. 22(Issue 11) pp:4811-4817
Publication Date(Web):30 Jan 2012
DOI:10.1039/C2JM14210D
Graphite oxide (GO) nanoplatelets with a thickness from 0.8 nm to 2 nm were prepared using a modified Hummers method. By employing GO nanoplatelets as nanofillers, poly(acrylic acid)–GO superabsorbent nanocomposites were synthesized by a facile solution polymerization of acrylic acid monomers using N,N′-methylenebisacrylamide as cross-linker and ammonium persulfate as initiator. The well-dispersed GO nanoplatelets in the polymer networks results in a significant improvement in absorbencies both in distilled water and saline solutions. With only a very low loading of GO in the superabsorbent nanocomposite, for example 0.073 wt%, its water absorbency reaches up to 508 g g−1, which is nearly as twice that of the poly(acrylic acid) (PAA) superabsorbent. The superabsorbent nanocomposite also exhibits a superior water-retention ability compared with the control under the same conditions. Our study may provide a new way for the development of novel, GO-based superabsorbent nanocomposites with improved absorbency and may find a variety of useful applications.
Co-reporter:Dazhi Tan, Wenjie Fan, Wannan Xiong, Hanxue Sun, An Li, Weiqiao Deng, Changgong Meng
European Polymer Journal 2012 Volume 48(Issue 4) pp:705-711
Publication Date(Web):April 2012
DOI:10.1016/j.eurpolymj.2012.01.012
A series of homocoupled conjugated microporous polymers (HCMPs) were prepared by cross-coupling polymerization of 1,3,5-triethynylbenzene and 1,4-diethynylbenzene with various monomer molar ratios. Our results show that the molar ratio of monomers has a remarkable influence on the surface area, pore volume, and micropore volume of the as-synthesized HCMP samples. With the increase of molar ratio of 1,3,5-triethynylbenzene to 1,4-diethynylbenzene, the surface area and total pore volume increased while the micropore volume decreased for these HCMP samples. We also investigated the adsorption performance for hydrogen and organic solvents of these HCMP samples. Results obtained from experiments show that the increase of total pore volume (contributed from both mesopore and micropore) of HCMPs would lead to an increase in their adsorption abilities for organic solvents, while hydrogen sorption ability for HCMPs can only be improved by increasing their micropore volume, which may provide useful guidance for the rational design of novel HCMPs with different porosities as absorbent materials for oil/organic solvents or hydrogen storage systems.Graphical abstractHighlights► We prepared conjugated microporous polymers (CMPs) by poly(phenylene butadiynylene). ► The molar ratio of monomers has a great influence on surface area and porosity. ► Increasing total pore volume will increase adsorption ability for organic solvents. ► Hydrogen sorption ability can be improved by increasing the micropore volume. ► We provide guidance for design of new CMPs with different porosities as absorbent.
Co-reporter:Dazhi Tan;Wenjie Fan;Wannan Xiong;Hanxue Sun;Yaqi Cheng;Xiaoyu Liu;Changgong Meng;Wei-Qiao Deng
Macromolecular Chemistry and Physics 2012 Volume 213( Issue 14) pp:
Publication Date(Web):
DOI:10.1002/macp.201290042
Co-reporter:Dazhi Tan;Wenjie Fan;Wannan Xiong;Hanxue Sun;Yaqi Cheng;Xiaoyu Liu;Changgong Meng;Wei-Qiao Deng
Macromolecular Chemistry and Physics 2012 Volume 213( Issue 14) pp:1435-1440
Publication Date(Web):
DOI:10.1002/macp.201200084
Abstract
Two-dimensional conjugated microporous polymers (CMPs) composed of alternative phenylene and ethynylene units are synthesized, by cross-coupling polymerization of 1,3,5-triethynylbenzene and 1,3,5-tribromobenzene with various solvents. Our work shows that the morphology of CMPs is greatly affected by the choice of solvents used in synthesis. Sphere, tubular, and plate-like structures are received by using the toluene, p-xylene, and mesitylene solvents, respectively. Our results demonstrate that the morphology of CMPs affects the storage capacity for organic solvents remarkably, with the plate-like CMP showing best performance. This work is expected to provide useful guidance to rationally design CMPs as absorbent materials for organic solvents.
Co-reporter:Hanxue Sun, Peiqing La, Ruixia Yang, Zhaoqi Zhu, Weidong Liang, Baoping Yang, An Li, Weiqiao Deng
Journal of Hazardous Materials (5 January 2017) Volume 321() pp:210-217
Publication Date(Web):5 January 2017
DOI:10.1016/j.jhazmat.2016.09.015
•Cigarette filter was utilized to prepare highly porous carbons as super absorbents.•The porous carbons exhibit excellent iodine uptake.•The porous carbons show high CO2 adsorption capacity of 6.0 mmol g−1 at 273 K.Porous carbons as solid-state adsorbents have recently attracted considerable interest in the areas of storage and capture of CO2 as well as the adsorption of radioactive matters. In this work, cigarette butts, one kind of common wastes referring to the filters, were utilized to prepare highly porous carbons by KOH activation in argon atmosphere. The resulting porous carbon shows a high specific surface area of up to 2751 m2 g−1 with abundant micropores. The resulting porous carbon exhibits excellent iodine uptake of 262 wt% and high CO2 adsorption capacity of 6.0 mmol g−1 at ambient pressure and 273 K, which both are among the highest values reported to date. Given these excellent iodine uptake, CO2 adsorption capacity, ease of preparation as well as good physiochemical stability, the porous carbons derived from cigarette butts show great potential in the reversible adsorption of radioactive iodine and CO2.
Co-reporter:Yingfan Chen, Hanxue Sun, Ruixia Yang, Tingting Wang, Chunjuan Pei, Zhentao Xiang, Zhaoqi Zhu, Weidong Liang, An Li and Weiqiao Deng
Journal of Materials Chemistry A 2015 - vol. 3(Issue 1) pp:NaN91-91
Publication Date(Web):2014/11/06
DOI:10.1039/C4TA04235B
Conjugated microporous polymer nanotubes (CMPNs) with a surface area of up to 1368 m2 g−1 were synthesized by a simple one-step crosscoupling reaction and employed as a platform for investigation of CO2 and I2 adsorption. A high adsorption capacity of up to 208 wt% for reversible I2 capture was achieved.
Co-reporter:Fei Wang, Feng Ren, Peng Mu, Zhaoqi Zhu, Hanxue Sun, Chonghua Ma, Chaohu Xiao, Weidong Liang, Lihua Chen and An Li
Journal of Materials Chemistry A 2017 - vol. 5(Issue 22) pp:NaN11356-11356
Publication Date(Web):2017/05/10
DOI:10.1039/C7TA02982A
Herein, two conjugated microporous polymers (CMPs) containing dual heteroatoms (named as CMPSNs) were synthesized using 4,7-dibromobenzo[c][1,2,5]thiadiazole and alkynyl monomers as the building blocks though a Sonogashira–Hagihara cross-coupling reaction for the efficient removal of antibiotics from water. Fourier transform infrared spectroscopy (FT-IR), 13C CP/MAS solid-state NMR, ultraviolet (UV) adsorption spectroscopy and fluorescence spectroscopy were used to confirm the structure of the resulting CMPSNs. Under our synthesis conditions, CMPSNs with interesting morphologies were obtained, where the macroscopically porous network structure was composed of aggregated hierarchical micrometre-sized microporous spheres. Employing tetracycline as a model antibiotic, for the first time, the performance of the CMPSNs for the removal of tetracycline from water was systematically investigated. The results of the adsorption kinetics of tetracycline showed that the adsorption mechanism of the resulting polymers followed a pseudo-second-order model. Moreover, the adsorption behaviour of CMPSNs for tetracycline fitted well with the Freundlich model. In addition, the adsorption thermodynamics indicated that the adsorption is an endothermic process, and it was also found that the temperature was beneficial to the adsorption and that the adsorption process was spontaneous. The findings obtained from this work make the CMPSNs promising candidates for the capture of tetracycline, which may open a new opportunity to address certain environmental issues, especially from the global-scale severe water pollution arising from antibiotics.
Co-reporter:Zhao-Qi Zhu, Han-Xue Sun, Xiao-Juan Qin, Lei Jiang, Chun-Juan Pei, Li Wang, Ying-Qiu Zeng, Shu-Hao Wen, Pei-Qing La, An Li and Wei-Qiao Deng
Journal of Materials Chemistry A 2012 - vol. 22(Issue 11) pp:NaN4817-4817
Publication Date(Web):2012/01/30
DOI:10.1039/C2JM14210D
Graphite oxide (GO) nanoplatelets with a thickness from 0.8 nm to 2 nm were prepared using a modified Hummers method. By employing GO nanoplatelets as nanofillers, poly(acrylic acid)–GO superabsorbent nanocomposites were synthesized by a facile solution polymerization of acrylic acid monomers using N,N′-methylenebisacrylamide as cross-linker and ammonium persulfate as initiator. The well-dispersed GO nanoplatelets in the polymer networks results in a significant improvement in absorbencies both in distilled water and saline solutions. With only a very low loading of GO in the superabsorbent nanocomposite, for example 0.073 wt%, its water absorbency reaches up to 508 g g−1, which is nearly as twice that of the poly(acrylic acid) (PAA) superabsorbent. The superabsorbent nanocomposite also exhibits a superior water-retention ability compared with the control under the same conditions. Our study may provide a new way for the development of novel, GO-based superabsorbent nanocomposites with improved absorbency and may find a variety of useful applications.
Co-reporter:Feng Ren, Zhaoqi Zhu, Xin Qian, Weidong Liang, Peng Mu, Hanxue Sun, Jiehua Liu and An Li
Chemical Communications 2016 - vol. 52(Issue 63) pp:NaN9800-9800
Publication Date(Web):2016/07/07
DOI:10.1039/C6CC05188J
Two conjugated microporous polymers containing thiophene-moieties (SCMPs) were obtained by the polymerization of 3,3′,5,5′-tetrabromo-2,2′-bithiophene and ethynylbenzene monomers through the palladium-catalyzed Sonogashira–Hagihara crosscoupling reaction. The resulting SCMPs show high thermal stability with a decomposition temperature above 300 °C. Scanning electron microscopy images show that the resulting SCMPs formed as an aggregation composed of micrometer-sized SCMP spheres, in which honeycomb-like porous spheres with penetrated pores on the surface were observed. Taking advantage of such a unique honeycomb-like porous morphology as well as π-conjugated structures, the SCMPs show ultrahigh absorption performance for iodine vapour with an uptake of up to 345 wt% obtained, which is the highest value reported to date for CMPs, thus making the resulting SCMPs ideal absorbent materials for reversible iodine capture to address environmental issues.
