Co-reporter:Jianming Pan, Jinxin Liu, Yue Ma, Xiaobin Huang, Xiangheng Niu, Tao Zhang, Xueping Chen, Fengxian Qiu
Chemical Engineering Journal 2017 Volume 317(Volume 317) pp:
Publication Date(Web):1 June 2017
DOI:10.1016/j.cej.2017.02.078
•A new strategy named as post functionalization with B-N coordination complex was presented.•PGM-Pickering-0.10-BN possessed hierarchical porous structure and Wulff-type boronic acids.•PGM-Pickering-0.10-BN showed specific capture of flavone under neutral condition.•The results could be facilely adopted to predict and design optimal conditions in the scale-up.An apparent disadvantage of boronate affinity is that it has to be performed in alkaline media and can lead to the oxidation of cis-diols in compounds. A new strategy named as post functionalization with B-N coordination complex was present to prepare boronic acid suspended macroporous polymeric monolith for the selective capture of cis-diol-containing luteolin (LTL) under neutral condition. In this work, a water-in-oil (W/O) Pickering (high internal phase emulsions) HIPE template stabilized by boronic acid suspended mesoporous silica nanoparticles (BA-MSNs) was applied to prepare macroporous poly(glycidyl methacrylate) monolith (PGM-Pickering-0.10), and then B-N coordination complex resulted from the reaction of 3-aminophenylboronic acid (APBA) and 1,6-hexamethylenediamine was integrated to the PGM-Pickering-0.10. As-prepared hierarchical porous PGM-Pickering-0.10-BN with “Wulff-type boronic acids” possessed special mesopore-in-macropore structure. In static adsorption, pH-dependent adsorption experiments demonstrated that PGM-Pickering-0.10-BN was able to capture LTL with expected high adsorption amount (158.5 µmol g−1 at 298 K) and fast binding kinetics (equilibrium in 2.0 h) under neutral condition, while macroporous polymers without post functionalization or functionalized only with APBA display poor adsorption performance at pH = 7.0. In addition, BA-MSNs as the stabilizers enhanced the mechanical property and specific adsorption ability of PGM-Pickering-0.10-BN simultaneously, and the integrated B-N coordination complex did play vital roles in the specific adsorption of LTL. By optimizing dynamic adsorption factors with response surface methodology (RSM), the maximum adsorption amount of 177.8 µmol g−1 was also achieved under neutral condition.
Co-reporter:Jianming Pan, Xiaobin Huang, Lin Gao, Yinxian Peng, Shucheng Liu, Runxing Gu
Chemical Engineering Journal 2017 Volume 312(Volume 312) pp:
Publication Date(Web):15 March 2017
DOI:10.1016/j.cej.2016.11.142
•MPs-BA-1 possessed macroporous polymer network and accessible binding sites for cis-diols.•MPs-BA-1 has excellent adsorption capacity, binding kinetics, specific affinity, and reusability.•Dynamic adsorption incorporated with analysis of RSM determined the optimal conditions.•The results could be facilely adopted to predict and design optimal conditions in the scale-up.Macroporous polymers with boronate affinity ability (MPs-BA-1) were prepared via high internal phase emulsions (HIPEs) template and then applied to selective adsorption a natural favonoid luteolin (LTL). As-prepared MPs-BA-1 possessed macroporous polymer network and accessible binding sites for cis-diols, and its adsorption behaviors were studied using static and dynamic methods. In static conditions, adsorption amount of LTL increased rapidly in the first 30 min and reached to equilibrium in approximately 2.0 h. Superior conformity of the second-order model confirmed the chemical nature of the interaction between the LTL and binding sites. The fitting adsorption isotherm was a Langmuir type, and the maximum monolayer adsorption amounts at 298 K, 308 K and 318 K were 60.97 μmol g−1, 70.10 μmol g−1, and 55.03 μmol g−1, respectively. Dynamic adsorption incorporated with the analysis of response surface methodology (RSM) suggested that the optimal adsorption amount (73.47 μmol g−1) achieved when the flow rate of LTL solution was 3.0 mL min−1, temperature was 28.28 °C and concentration of LTL solution was 30 mg L−1. MPs-BA-1 served the specific adsorption towards LTL, and the recognition mechanism based on borate affinity was also described. MPs-BA-1 retained the adsorption amounts for successive cycles, but the loss using dynamic method was larger than in the batch method.Download high-res image (196KB)Download full-size image
Co-reporter:Tao Zhang, Liying Kong, Yuting Dai, Xuejie Yue, Jian Rong, Fengxian Qiu, Jianming Pan
Chemical Engineering Journal 2017 Volume 309(Volume 309) pp:
Publication Date(Web):1 February 2017
DOI:10.1016/j.cej.2016.08.085
•The MnO2 nanowires/polyurethane PU foam composites were prepared.•Effect of the content of MnO2 nanowires on oils adsorption was studied.•The foam composites show high absorbency for oils and organic solvents.•The foam composites could be easily regenerated and reused for up to five cycles.The severe environmental and ecological problems, derived from oil spills and organic solvents leakage, have occurred in many parts of the world. It is urgent to seek appropriate ways to resolve oily wastewater and organic solvent pollution. A versatile oil-absorbing material which can separate the oily wastewater effectively and quickly is in high demanded for this issue. In this work, we report a facile and inexpensive to fabricate an effective and recyclable oil-absorbent, namely MnO2 nanowires/polyurethane (PU) foam composites, using a PU sponge as a porous substrate and MnO2 nanowires as modifiers. The hydrothermal method is employed to synthesize MnO2 nanowires and then foaming technology is used to fabricate MnO2 nanowires/PU foam composites. In order to enhance the hydrophobic and oleophilic properties, the surfaces of MnO2 nanowires are chemically modified using silane coupling agent (KH 570). The present MnO2 nanowires/PU foam composites not only effectively separate oils from water as expected, but also possess a very high absorption capacity for the removal of organic solvents from water up to 40.15 times its own weight. More importantly, the obtained MnO2 nanowires/PU foam composites is demonstrated to have excellent oil recoverability and absorbent regenerability, making them versatile and comprehensive absorbents to satisfy various practical oily wastewater and organic solvent separation requirements.
Co-reporter:Shucheng Liu, Sudhirkumar Shinde, Jianming Pan, Yue Ma, Yongsheng Yan, Guoqing Pan
Chemical Engineering Journal 2017 Volume 324(Volume 324) pp:
Publication Date(Web):15 September 2017
DOI:10.1016/j.cej.2017.04.133
•Interface-induced growth of boronate-based metal-organic framework membrane on porous carbon substrate was presented.•Catechol-containing medicinal natural flavone Luteolin could be selectively captured by MOF membrane composite.•Commercially available Luteolin with 85% purity could be easily extracted and concentrated to 99.90% purity.•MOF membrane composite would be used for specific separation of natural product with cis-diol or catechol moieties.For metal-organic frameworks (MOFs), introduction of special functional groups and integration on porous support will endow the MOF with specific molecular affinity and tunable membrane-like surface properties. Herein, we demonstrated a facile interface-induced Zn(II)-ligand-fragment co-assembly strategy to in situ fabricate boronate-based MOF membrane on hydrophobic porous carbon substrate for specific molecular recognition and separation. Due to the phenylboronic acid groups and hydrophobic porous carbon supporting layer, a catechol-containing medicinal natural flavone Luteolin was found to be efficiently and selectively recognized on the MOF composite in water-containing solution. As compared to the separated MOF particles and carbon substrate, the MOF composite exhibited similar adsorption kinetics but significant higher adsorption capacity in static separation. Dynamic separation also revealed that the MOF composite could achieve a desirable maximum adsorption capacity under mild separation condition, implying its applicability in industrial application. As a proof of this concept, a commercially available Luteolin with 85% purity could be easily extracted and concentrated to 99.90% purity by the MOF composite in highly aqueous solution, and the products possessed the similar antibacterial performance with standard substance. These results demonstrated that, a membrane-like functionalized MOF composite with enhanced surface hydrophobicity and improved molecular specificity has great potential for separation of industrial and even biological samples under water compatible conditions.Download high-res image (79KB)Download full-size image
Co-reporter:Xiangheng Niu, Qingang Xiong, Jianming Pan, Xin Li, Wenchi Zhang, Fengxian Qiu, Yongsheng Yan
Fuel 2017 Volume 190(Volume 190) pp:
Publication Date(Web):15 February 2017
DOI:10.1016/j.fuel.2016.11.033
•Small Pd NPs inside S-doped CMS was synthesized.•r-GSH was used as the reductant and capping agent as well as the C and S sources.•The synthesized catalyst demonstrates high electro-catalytic activity toward MOR.•The synthesized catalyst shows excellent stability of electro-catalytic activity.In this work, small palladium nanoparticles (Pd NPs) inside sulfur-doped carbon microsphere (S-CMS) were synthesized to achieve both high electro-catalytic activity and long durability for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs). The highly dispersed Pd NPs encapsulated in S-CMS with an architectural feature like the plum pudding model were obtained via a facile one-pot hydrothermal synthesis employing reduced glutathione (r-GSH) as both reducing and capping agents, followed by a simple carbonization procedure. The synthesized Pd NPs inside S-CMS was found to provide larger effective surface for MOR compared to commercial Pd/C. Mass activity 5.9 times higher than that of Pd/C was acquired, originating from the small size of Pd NPs and their interactions with the heteroatom-modified CMS coating. Due to the decreased agglomeration and dissolution, the proposed encapsulated Pd NPs also kept more stable during continuous start-stop operation, suggesting its great potential as an effective anode material to be used in DMFCs.Download high-res image (68KB)Download full-size image
Co-reporter:Tao Zhang, Xuejie Yue, Lele Gao, Fengxian Qiu, Jicheng Xu, Jian Rong, Jianming Pan
Journal of Cleaner Production 2017 Volume 144(Volume 144) pp:
Publication Date(Web):15 February 2017
DOI:10.1016/j.jclepro.2017.01.030
•The hierarchically porous Bi2O3/LDHs composites were prepared.•The porous Bi2O3/LDHs composites are quite effective for iodine adsorption.•LDH platelets are fabricated into 3D architectures on Al2O3 fibers surface.•Isotherms and kinetics were studied.The discharge of iodine-containing wastewater into environment will lead to the water pollution due to the toxicity and radioactivity of iodine and iodine isotopes. A versatile adsorbent which can effectively adsorb the iodine is in high demanded for this issue. In this work, the hierarchically porous bismuth oxide/layered double hydroxide (Bi2O3/LDHs) composites were prepared based on biological template techniques, and the as-prepared composites show enhanced iodine adsorption capacity compared with LDHs fibers. The MgAl LDHs fibers with hierarchical architectures are synthesized by directly growth of nanoscaled LDHs platelets on Al2O3 fiber surfaces. The Bi2O3/LDHs composites with sponge-like structures are prepared by desorption of Bi2O3 on the surfaces of LDHs fibers. The iodine adsorption behavior on Bi2O3/LDHs composites was examined in sodium iodine aqueous solutions. The appropriate iodine adsorption was obtained at a neutral pH with maximum adsorption capacity of 101.9 mg/g. The Langmuir model successfully describes the iodine adsorption isotherms, while the pseudo-second-order kinetic model is better at describing the iodine adsorption kinetics onto the Bi2O3/LDHs composites. Since the Bi2O3/LDHs composites show near complete removal of iodine ions, the as-prepared Bi2O3/LDHs composites are expected to have practical applications as iodine adsorbent in wastewater treatment.Download high-res image (159KB)Download full-size image
Co-reporter:Xiangheng Niu, Yanfang He, Jianming Pan, Xin Li, Fengxian Qiu, Yongsheng Yan, Libo Shi, Hongli Zhao, Minbo Lan
Analytica Chimica Acta 2016 Volume 947() pp:42-49
Publication Date(Web):1 December 2016
DOI:10.1016/j.aca.2016.10.013
•Uncapped nanobranch-based CuS clews with large active surface and abundant sites.•Peroxidase-like activity, with preferable kinetics compared to HRP.•Outstanding performance for the colorimetric sensing of H2O2.•Reliable monitoring of glucose in clinical samples when in couple with GOD.Nanosized materials acting as substitutes of natural enzymes are currently attracting significant research due to their stable enzyme-like characteristics, but some flaws of these nanozymes, including their limited catalytic rate and efficiency, need to be remedied to enable their wider applications. In this work, we verify for the first time the catalytic behavior of uncapped nanobranch-based CuS clews as a peroxidase mimic. XRD, XPS, SEM, and TEM proofs demonstrate that high-purity CuS clews composed of intertwined wires with abundant nanodendrites outside are successfully produced via a facile one-pot hydrothermal synthesis approach, with thiourea as both the sulfion source and the structure-directing agent. The synthesized CuS can catalytically oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) by H2O2 to trigger a visible color reaction with rapid response (reaching a maximum change within 5 min). The proposed CuS nanozyme exhibits preferable catalytic kinetics over natural horseradish peroxidase (HRP). This outstanding activity primarily results from the large surface area and rich sites exposed by the uncapped unique structure. Under optimized conditions, the fabricated sensing system provides linear absorbance (652 nm) changes in the H2O2 concentration range of 0.2˜130 μM, with a detection limit of as low as 63 nM. When coupled with glucose oxidase (GOD), the system is demonstrated to be capable of monitoring glucose in blood samples with excellent performance.
Co-reporter:Jianming Pan, Yanli Mao, Heping Gao, Qingang Xiong, Fengxian Qiu, Tao Zhang, Xiangheng Niu
Carbohydrate Polymers 2016 Volume 143() pp:212-222
Publication Date(Web):5 June 2016
DOI:10.1016/j.carbpol.2016.02.034
•Two kinds of hydrophobic polymer foam catalysts were prepared by HIPEs.•Cr3+-HPFs-1-H+ and HPFs-1-H+ possess Lewis–Brønsted double acid sites.•Lewis and Brønsted acid sites could be adjusted.•This work opens up a simple route to synthesis catalysts with double acid sites.Herein we reported a simple and novel synthetic strategy for the fabrication of two kinds of hydrophobic polymer foam catalysts (i.e. Cr3+-HPFs-1-H+ and HPFs-1-H+) with hierarchical porous structure, inhomogeneous acidic composition and Lewis–Brønsted double acid sites distributed on the surface, which was used to one-pot conversion of carbohydrate (such as cellulose, glucose and fructose) to a key chemical platform (i.e. 5-hydroxymethylfurfural, HMF). The water-in-oil (W/O) high internal phase emulsions (HIPEs), stabilized by both Span 80 and acidic prepolymers as analogous particles offered the acidic actives, were used as the template for simultaneous polymerization of oil phase in the presence of divinylbenzene (DVB) and styrene (St). After subsequent ion-exchange process, Lewis and Brønsted acid sites derived from exchanged Cr3+ and H+ ion were both fixed on the surface of cell of the catalysts. The HPFs-1-H+ and Cr3+-HPFs-1-H+ had similar hierarchical porous, hydrophobic surface and acid sites (HPFs-1-H+ with macropores ranging from 0.1 μm to 20 μm, uniform mesopores in 14.4 nm, water contact angle of 122° and 0.614 mmol g−1 of Brønsted acid sites, as well as Cr3+-HPFs-1-H+ with macropores ranging from 0.1 μm to 20 μm, uniform mesopores in 13.3 nm, water contact angle of 136° and 0.638 mmol g−1 of Lewis–Brønsted acid sites). It was confirmed that Lewis acid sites of catalyst had a slight influence on the HMF yield of fructose came from the function of Brønsted acid sites, and Lewis acid sites were in favor of improving the HMF yield from cellulose and glucose. This work opens up a simple and novel route to synthesize multifunctional polymeric catalysts for efficient one-pot conversion of carbohydrate to HMF.
Co-reporter:Xiangheng Niu, Jianming Pan, Fengxian Qiu, Xin Li, Yongsheng Yan, Libo Shi, Hongli Zhao, Minbo Lan
Talanta 2016 Volume 161() pp:615-622
Publication Date(Web):1 December 2016
DOI:10.1016/j.talanta.2016.09.024
•Anneal-shrinked Cu2O dendrites grown on Cu foam for nonenzymatic glucose sensing.•The facile anneal and the compatibility of Cu2O and Cu lead to a robust interface.•The porosity of Cu2O-decorated Cu foam provides large active surface.•Excellent stability and ultrahigh sensitivity for glucose detection.Enzyme-free electrochemical detection of glucose in alkaline media with favorable properties has been acquired by fabricating a robust and large-surface sensing platform, which is composed of anneal-shrinked Cu2O dendrites grown on porous Cu foam. On the one hand, the good compatibility of electrodeposited Cu2O architectures and Cu foam substrate, together with a post-deposition anneal at 200 °C, offers a mechanically stable interface for glucose determination. On the other hand, the macropores of Cu foam that is decorated with unique Cu2O dendrites provide large active surface for electrocatalytic reaction and mass transport. As a result, selective sensing of glucose in the linear concentration range of 0.001–1.4 mM was achieved on the fabricated sensor, with a sensitivity of as high as 5.04 mA cm−2 mM−1 and a detection limit of 0.13 μM. Desired long-term performance stability was obtained, partially due to the strong adhesion of Cu2O microstructures to the Cu foam support after annealing. Practical monitoring of glucose in serum samples was also demonstrated on the proposed sensor.
Co-reporter:Yanfeng Tang, Xinlin Liu, Changchang Ma, Mingjun Zhou, Pengwei Huo, Longbao Yu, Jianming Pan, Weidong Shi and Yongsheng Yan
New Journal of Chemistry 2015 vol. 39(Issue 7) pp:5150-5160
Publication Date(Web):16 Apr 2015
DOI:10.1039/C5NJ00681C
In this work, reduced graphene oxide (RGO)–CdS/ZnS heterostructure composites have been successfully synthesized by a hydrothermal method by assembling the CdS/ZnS heterostructure nanoparticles on RGO sheets and the reduction of GO occurs simultaneously. The as-prepared RGO–CdS/ZnS composites with the content of 15% RGO exhibit highly active photodegradation of TC. A possible mechanism for the enhanced photocatalytic activity has been discussed. The CdS/ZnS heterostructure facilitates the transformation of electrons, which is excited by light irradiation in the conduction band of CdS. RGO is supposed to be an electron transfer channel, which is used to reduce the recombination of electron–hole pairs, thus enhancing the photo-conversion efficiency. By profiting from the synergy of RGO and CdS/ZnS heterostructure, the photocatalysts not only show a better photocatalytic activity in tetracycline antibiotics but also prevent pure CdS or ZnS from photocorrosion. At last, RGO–CdS/ZnS shows remarkable stability and cyclic performances.
Co-reporter:Jianming Pan;Yijie Yin;Yunlei Zhang;Runrun Wu;Xiaohui Dai ;Yongsheng Yan
Journal of Applied Polymer Science 2015 Volume 132( Issue 27) pp:
Publication Date(Web):
DOI:10.1002/app.42087
ABSTRACT
Thermoresponsive and magnetic molecularly imprinted polymers (TMMIPs) based on magnetic carbon nanotubes (MCNTs) were prepared and applied to the switched recognition and controlled release of 2,4,5-trichlorophenol (2,4,5-TCP) from aqueous solution. In this study, MCNTs were first synthesized via the encapsulation of Fe3O4 nanoparticles into the tunnel of carbon nanotubes by a wet impregnation technology. Then, the TMMIPs were synthesized with N-isopropyl acrylamide as a thermal functional monomer by free-radical polymerization. The magnetic sensitivity and stability of the prepared materials were tested with a vibrating sample magnetometer (saturation magnetization = 1.4 emu/g) and atomic absorption spectrophotometer (in the pH range 3.0–8.0), respectively. The thermoresponsive properties of the TMMIPs were evaluated by two means, including the results of ultraviolet–visible spectroscopy and the controlled release of 2,4,5-TCP at 30 and 40°C, respectively. The effects of the pH, initial concentration, and contact time on adsorption were examined with batch mode experiments, and several other compounds were selected as model analytes to evaluate the selective recognition performance of the TMMIPs. This demonstrated that the TMMIPs had a higher affinity for 2,4,5-TCP than did the thermoresponsive and magnetic nonimprinted polymers. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42087.
Co-reporter:Jianming Pan, Heping Gao, Yunlei Zhang, Jun Zeng, Weidong Shi, Changhua Song, Yongsheng Yan, Longbao Yu and Dandan Chang
RSC Advances 2014 vol. 4(Issue 103) pp:59175-59184
Publication Date(Web):21 Oct 2014
DOI:10.1039/C4RA10383A
This work addressed efficient one-pot conversion of cellulose to 5-hydroxymethylfurfural by porous solid acid in the presence of 1-ethyl-3-methyl-imidazolium chloride ([Emim]Cl). On the basis of stable water-in-oil pickering high internal phase emulsions (HIPEs), porous solid acid (HC-PDVB-SS-SO3H) was prepared by polymerizing divinylbenzene (DVB) and sodium p-styrenesulfonate (SS), succedent sulfonation in H2SO4 and hypercrosslinking process. HC-PDVB-SS-SO3H with a stable network exhibited mesopores within a macropore structure, high BET specific surface area and more super-strong acid sites. To test catalytic activity, the reaction conditions were optimized via response surface methodology, and the sequence of the three variables affecting HMF yield followed the order, temperature > reaction time > amount of catalyst. By comparing with the other as-prepared porous solid acid, it can also be concluded that BET specific surface area and super-strong acid site both played key roles in cellulose conversion. Moreover, HC-PDVB-SS-SO3H was very easily reused at least four times without significant loss of activity.
Co-reporter:Xiao-Hui Dai, Zhi-Ming Wang, Ya-fei Huang, Jian-Ming Pan, Yong-sheng Yan, Dong-Ming Liu and Lin Sun
RSC Advances 2014 vol. 4(Issue 80) pp:42486-42493
Publication Date(Web):26 Aug 2014
DOI:10.1039/C4RA07402E
In this study, star-shaped porphyrin-cored poly(ε-caprolactone)-b-poly(gluconamidoethyl methacrylate) block copolymers (SPPCL-PGAMA) were successfully obtained. The synthetic route was via the ring-opening polymerization (ROP) of ε-caprolactone using a tetra-hydroxyethyl terminated porphyrin as a core initiator followed by the atom transfer radical polymerization (ATRP) of unprotected gluconamidoethyl methacrylate (GAMA) in 1-methyl-2-pyrrolidinone (NMP) solution at room temperature. The structure of the copolymer was thoroughly studied by nuclear magnetic resonance spectroscopy (NMR), Gel Permeation Chromatography (GPC), Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). Notably, the as-prepared SPPCL-b-PGAMA that formed different structures being used for drug delivery systems has been researched. Moreover, this copolymer can release singlet oxygen under light irradiation and the singlet oxygen could be used for photodynamic therapy. In particular, UV-vis analysis showed that SPPCL-b-PGAMA has a very specific recognition with Concanavalin A (Con A) which provides porphyrin-cored SPPCL-b-PGAMA block copolymers for targeted drug delivery.
Co-reporter:Hui Hang;Chunxiang Li;Linzi Li;Jiangdong Dai;Xiaohui Dai;Ping Yu;Yonghai Feng
Journal of Separation Science 2013 Volume 36( Issue 19) pp:3285-3294
Publication Date(Web):
DOI:10.1002/jssc.201300494
Porous/magnetic molecularly imprinted polymers (PM-MIPs) were prepared by Pickering emulsion polymerization. The reaction was carried out in an oil/water emulsion using magnetic halloysite nanotubes as the stabilizer instead of a toxic surfactant. In the oil phase, the imprinting process was conducted by radical polymerization of functional and cross-linked monomers, and porogen chloroform generated steam under the high reaction temperature, which resulted in some pores decorated with easily accessible molecular binding sites within the as-made PM-MIPs. The characterization demonstrated that the PM-MIPs were porous and magnetic inorganic–polymer composite microparticles with magnetic sensitivity (Ms = 0.7448 emu/g), thermal stability (below 473 K) and magnetic stability (over the pH range of 2.0–8.0). The PM-MIPs were used as a sorbent for the selective binding of lambdacyhalothrin (LC) and rapidly separated under an external magnetic field. The Freundlich isotherm model gave a good fit to the experimental data. The adsorption kinetics of the PM-MIPs was well described by pseudo-second-order kinetics, indicating that the chemical process could be the rate-limiting step in the adsorption of LC. The selective recognition experiments exhibited the outstanding selective adsorption effect of the PM-MIPs for target LC. Moreover, the PM-MIPs regeneration without significant loss in adsorption capacity was demonstrated by at least four repeated cycles.
Co-reporter:Jianming Pan, Hui Hang, Xiuxiu Li, Wenjing Zhu, Minjia Meng, Xiaohui Dai, Jiangdong Dai, Yongsheng Yan
Applied Surface Science 2013 Volume 287() pp:211-217
Publication Date(Web):15 December 2013
DOI:10.1016/j.apsusc.2013.09.130
Highlights
- •
Temperature responsive molecularly imprinted polymers (T-MIPs) were prepared based on the surface of yeast by electron transfer atom transfer radical polymerization.
- •
T-MMIPs were composed of temperature responsive imprinted layer.
- •
The maximum release proportion for T-MIPs at 20 °C in water for 24 h was 71.08%.
- •
The selective recognition experiments demonstrated high affinity and selectivity of T-MIPs towards CFX over competitive compounds.
- •
The results suggested binding properties of T-MIPs were related to the testing temperature.
Co-reporter:Jianming Pan;Wei Guan;Zulei Zhang;Xue Wang;Chunxiang Li; Dr. Yongsheng Yan
Chinese Journal of Chemistry 2010 Volume 28( Issue 12) pp:2483-2488
Publication Date(Web):
DOI:10.1002/cjoc.201190026
Abstract
Based on sodium trititanate whisker as support particles, the surface ion-imprinted polymer (S-IIP) was synthesized for the selective adsorption of Co(II) ions from aqueous solution. Characterization of S-IIP was achieved by FTIR spectra and SEM micrographs. Kinetic properties were successfully investigated by the pseudo-first-order model and pseudo-second-order model, and a chemisorption process as the essential adsorption step was also proposed. Equilibrium data were fitted with the Langmuir, Dubinin-Radushkevich and Freundlich isotherm equations, and the maximum adsorption amount of monolayer saturation for S-IIP was 33.75 mg/g at 298 K. Moreover, dimensionless separation factor RL (RL<1.0) indicated a highly favourable adsorption system between Co(II) ions and S-IIP. Selectivity experiments showed that selective adsorption of Co(II) ions for S-IIP was significantly higher than that of non-imprinted polymer (NIP).
Co-reporter:Chun Xiang Li, Jian Ming Pan, Jie Gao, Yong Sheng Yan, Gan Qing Zhao
Chinese Chemical Letters 2009 Volume 20(Issue 8) pp:985-989
Publication Date(Web):August 2009
DOI:10.1016/j.cclet.2009.03.020
The surface ion-imprinting concept and chitosan incorporated sol–gel process were applied to the synthesis of a new attapulgite-supported polymer for selective separation of Ce(III) from aqueous solution. The imprinting mechanism of prepared ion-imprinted polymer were discussed with the Characteristics of FT-IR and SEM. Results from the experiments of adsorption capacity and selectivity suggested that ion-imprinted polymer offered a fast kinetics for the adsorption of Ce(III) under the optimum conditions. Its maximum adsorption capacity was 38.02 mg/g, and the selective recognition towards Ce(III) was much higher than that of the non-imprinted polymer and attapulgite. The prepared functional polymer was shown to be promising for selective separation and enrichment of trace Ce(III) in environmental samples.
Co-reporter:Hengjia Zhu, Jianming Pan, Jun Cao, Yue Ma, ... Yongsheng Yan
Journal of Industrial and Engineering Chemistry (25 May 2017) Volume 49() pp:198-207
Publication Date(Web):25 May 2017
DOI:10.1016/j.jiec.2017.01.028
•This twice imprinting strategy solved the problem that the binding sites were embedded deeply in traditional MIPs prepared by bulk polymerization.•This strategy overcame the disadvantage of stabilizing solid particles on the surface of I–MIPs referring to the lack of specific adsorption activity.•I–MIPs have the specific binding sites to selectively recognize and remove the coexistence of LC and Cu(II).•I–MIPs possessed enhanced adsorption capacity, fast kinetics and excellent specific selectivity toward LC and Cu(II).Herein we reported a facile method to prepare porous ion/molecule imprinted polymers (I-MIPs) via twice imprinting strategy for the simultaneous uptake of copper ions (Cu(II)) and λ-cyhalothrin (LC). Firstly, N-(β-aminoethyl)-γ-aminopropytrimethoxysilane (DAMO) was grafted on silica particles surface to synthesis Cu(II)-imprinted polymers to introduce iron imprinted sites. They were then utilized as stabilizers to prepare a stable W/O Pickering HIPEs template (LC as the imprinting molecule), which was then polymerized with dual imprinting sites including Cu(II) and LC. The adsorption equilibrium, kinetic results and selective recognition experiments were exhibited their prospected dual selectivity and simultaneous removal of LC and Cu(II).Download high-res image (200KB)Download full-size image
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