Shishan Wu

Brush-like block copolymer synthesized via RAFT polymerization for graphene oxide aqueous suspensions

Co-reporter:Min Qiao;Yanwei Wang;Qianping Ran

RSC Advances (2011-Present) 2017 vol. 7(Issue 8) pp:4776-4782

Publication Date(Web):2017/01/10

DOI:10.1039/C6RA27480C

A brush-like block copolymer of poly(acrylic acid)-block-poly(oligo(ethylene glycol)methyl ether acrylate) (PAA-b-POEGA) was synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization, and its dispersing ability as polymeric dispersant for graphene oxide (GO) sheets in aqueous suspensions was studied in comparison with a traditional random copolymer having similar chemical units. The graphene oxide aqueous suspensions remained stable at a GO concentration as high as 100 g L−1 for more than 7 days with the assistance of the prepared brush-like block copolymer, which could not be fulfilled by the random copolymer control group as dispersant. Measurements on polymer adsorption, zeta potential, shear viscosity, particle size analysis, and by small angle X-ray diffraction and scanning electron microscope were carried out to characterize the improved dispersing ability of the brush-like block copolymer for GO aqueous suspensions.

Sulfonic gemini surfactants: Synthesis, properties and applications as novel air entraining agents for concrete

Co-reporter:Jian Chen, Min Qiao, Nanxiao Gao, Qianping Ran, Shishan Wu, Shuai Qi

Colloids and Surfaces A: Physicochemical and Engineering Aspects 2017 Volume 522(Volume 522) pp:

Publication Date(Web):5 June 2017

DOI:10.1016/j.colsurfa.2017.03.052

•Six sulfonic gemini surfactants with different structures were synthesized.•They have higher surface activity, foamability and foam stability compared with their single-chained analogue.•They were utilized as the air entraining agents for concrete for the first time.•They show higher air entraining performance compared with their single-chained analogue.•Our studies can help to explore ideal synthetic surfactants for the development of novel air entraining agents.The development of high performance air entraining agents for concrete is of great importance. In this work, sulfonic gemini surfactants have been utilized as high performance air entraining agents for the first time. Six sulfonic gemini surfactants with different hydrophobic chains and spacer groups were designed and synthesized. The surface tensions and foam properties of their aqueous solutions were tested. Using them as the air entraining agents, the air contents and air-void parameters of the cement mortars were also tested. The properties of different geminis and their single-chained analogue were fully compared and discussed. The results show that the geminis have higher surface activity, foamability, foam stability and air entraining performance compared with their single-chained analogue, and the gemini with 12-carbon hydrophobic chains and 2-carbon alkyl spacer has highest performance.Download high-res image (135KB)Download full-size image

Gemini surfactants as novel air entraining agents for concrete

Co-reporter:Min Qiao, Jian Chen, Cheng Yu, Shishan Wu, Nanxiao Gao, Qianping Ran

Cement and Concrete Research 2017 Volume 100(Volume 100) pp:

Publication Date(Web):1 October 2017

DOI:10.1016/j.cemconres.2017.05.019

The development of high performance air entraining agents for concrete is of great importance. In this work, gemini surfactants (a new class of surfactants) have been utilized as air entraining agents for the first time. Three gemini surfactants modified with different anionic groups (sulfonic, sulfate and phosphate groups) were designed and synthesized. The surface tensions and foam heights of their solutions were tested. Using them as the air entraining agents, the air contents and air-void parameters of the cement mortars were tested. The study results clearly show that the gemini surfactants have higher surface activity, foamability, foam stability and air entraining performance compared with the corresponding single-chained surfactants, and the sulfate group modified gemini surfactant has the highest performance. These surfactants are tested merely as model compounds; however, they show higher air entraining ability compared with the benchmark surfactants used in the industry, indicating great potential for practical applications.We report for the first time the applications of gemini surfactants (a new class of surfactants) in the air entraining agents for concrete.Download high-res image (233KB)Download full-size image

A sensing approach for dopamine determination by boronic acid-functionalized molecularly imprinted graphene quantum dots composite

Co-reporter:Xi Zhou, Xuexia Gao, Fengyan Song, Chunpeng Wang, Fuxiang Chu, Shishan Wu

Applied Surface Science 2017 Volume 423(Volume 423) pp:

Publication Date(Web):30 November 2017

DOI:10.1016/j.apsusc.2017.06.199

•Novel strategy to improve the specificity of GQDs towards dopamine was developed.•Molecularly imprinted graphene quantum dots composites with boronic acid groups were facilely synthesized.•The dopamine could lead to fluorescence quenching of MIPs@ PIn-BAc/GQDs selectively.•MIPs@ PIn-BAc/GQDs sensor offered a millimicromole level detection for dopamine in biological systems.A novel fluorescence sensor was developed for dopamine (DA) determination based on molecularly imprinted graphene quantum dots and poly(indolylboronic acid) composite (MIPs@ PIn-BAc/GQDs). When the DA is added to the system, it leads to an aggregation and fluorescence quenching of the MIPs@ PIn-BAc/GQDs because of the covalent binding between the catechol group of DA and boronic acid. Such fluorescence behaviors are used for well testing DA in a range from 5 × 10−9 to 1.2 × 10−6 M with the detection limit of 2.5 × 10−9 M. Furthermore, the prepared sensors could well against the interferences from various biomolecules and be successfully used for the assay of DA in human biological samples, exhibiting excellent specificity. It is believed that the prepared MIPs@ PIn-BAc/GQDs hold great promise as a practical platform that can monitor DA level change.

Bamboo-like Composites of V2O5/Polyindole and Activated Carbon Cloth as Electrodes for All-Solid-State Flexible Asymmetric Supercapacitors

Co-reporter:Xi Zhou, Qiang Chen, Anqi Wang, Jian Xu, Shishan Wu, and Jian Shen

ACS Applied Materials & Interfaces 2016 Volume 8(Issue 6) pp:3776

Publication Date(Web):January 22, 2016

DOI:10.1021/acsami.5b10196

A bamboo-like nanomaterial composed of V2O5/polyindole (V2O5/PIn) decorated onto the activated carbon cloth was fabricated for supercapacitors. The PIn could effectively enhance the electronic conductivity and prevent the dissolution of vanadium. And the activation of carbon cloth with functional groups is conducive to anchoring the V2O5 and improving surface area, which results in an enhancement of electrochemical performance and leads to a high specific capacitance of 535.5 F/g. Moreover, an asymmetric flexible supercapacitor based on V2O5/PIn@activate carbon cloth and reduced graphene oxide (rGO)@activate carbon cloth exhibits a high energy density (38.7 W h/kg) at a power density of 900 W/kg and good cyclic stability (capacitance retention of 91.1% after 5000 cycles). And the prepared device is shown to power the light-emitting diode bulbs efficiently.Keywords: activated carbon cloth; asymmetric supercapacitors; flexible; polyindole; V2O5

POEGMA-b-PAA comb-like polymer dispersant for Al2 suspensions

Co-reporter:Anqi Wang;Min Qiao;Jian Xu;Yumei Pan;Qianping Ran;Qiang Chen

Journal of Applied Polymer Science 2016 Volume 133( Issue 17) pp:

Publication Date(Web):

DOI:10.1002/app.43352

ABSTRACT

POEGMA-b-PAA comb-like polymer is synthesized through RAFT polymerization, and it is employed as an efficient dispersant for Al₂O₃ suspensions. The POEGMA-b-PAA polymer consists of PAA chains and POEGMA comb-like chains. The former provide electrostatic attraction between Al₂O₃ particles and polymer, while the latter extend to solution and maintain the stability of suspension due to strong steric hindrance. The adsorption is proven and the rheology behaviors of Al₂O₃ suspensions are strongly improved. Different POEGMA-b-PAA polymers with different length of side chains have similar but not identical rheological properties. The polymer with the appropriate length of side chain provides the biggest improvement to rheological properties of Al₂O₃ suspensions, such as apparent viscosity and granularity. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43352.

Facile synthesis of a Co3O4@carbon nanotubes/polyindole composite and its application in all-solid-state flexible supercapacitors

Co-reporter:Xi Zhou, Anqi Wang, Yumei Pan, Chenfei Yu, Yun Zou, Yang Zhou, Qiang Chen and Shishan Wu

Journal of Materials Chemistry A 2015 vol. 3(Issue 24) pp:13011-13015

Publication Date(Web):13 May 2015

DOI:10.1039/C5TA01906K

A supercapacitor electrode composed of a polyindole (PIn)-modified carbon nanotubes (CNTs) composite (CNTs/PIn) decorated with Co3O4 nanoparticles was synthesized to enhance the electrochemical performance. The PIn shell could improve the electric conductivity and the dispersion of CNTs, and the functional groups of PIn are conducive to anchoring the Co3O4 particles on the CNTs/PIn composite with large effective surface area, leading to a high specific capacitance of 442.5 F g−1. Moreover, the all-solid-state supercapacitor exhibits a high energy density (42.9 W h kg−1) at a power density of 0.4 kW kg−1 and excellent cycling performance (90.2% capacitance retention after 5000 cycles), demonstrating its promising application as an efficient electrode material for electrochemical capacitors.

Facile Synthesis of Molecularly Imprinted Graphene Quantum Dots for the Determination of Dopamine with Affinity-Adjustable

Co-reporter:Xi Zhou, Anqi Wang, Chenfei Yu, Shishan Wu, and Jian Shen

ACS Applied Materials & Interfaces 2015 Volume 7(Issue 22) pp:11741

Publication Date(Web):January 20, 2015

DOI:10.1021/am5078478

A facilely prepared fluorescence sensor was developed for dopamine (DA) determination based on polyindole/graphene quantum dots molecularly imprinted polymers (PIn/GQDs@MIPs). The proposed sensor exhibits a high sensitivity with a linear range of 5 × 10–10 to 1.2 × 10–6 M and the limit of detection as low as 1 × 10–10 M in the determination of DA, which is probably due to the tailor-made imprinted cavities for binding DA thought hydrogen bonds between amine groups of DA and oxygen-containing groups of the novel composite. Furthermore, the prepared sensor can rebind DA in dual-type: a low affinity type (noncovalent interaction is off) and a high affinity type (noncovalent interaction is on), and the rebinding interaction can be adjusted by tuning the pH, which shows a unique potential for adjusting the binding interaction while keeping the specificity, allowing for wider applications.Keywords: affinity-adjustable; dopamine; fluorescence; graphene quantum dots; molecularly imprinted polymer; polyindole;

The carbonization of polyethyleneimine: facile fabrication of N-doped graphene oxide and graphene quantum dots

Co-reporter:Xi Zhou, Yumei Pan, Jian Xu, Anqi Wang, Shishan Wu and Jian Shen

RSC Advances 2015 vol. 5(Issue 128) pp:105855-105861

Publication Date(Web):03 Dec 2015

DOI:10.1039/C5RA25173G

In this study, N-doped graphene oxide (N-GO) and graphene quantum dots (N-GQDs) were synthesized by the carbonization of branched polyethyleneimine (PEI) in the presence of H2O2. The prepared N-GO has plenty of small sp2 clusters, which are non-uniform in size and poorly passivated, leading to a weak and an excitation-dependent photoluminescent (PL) performance. Whereas N-GQDs exhibit a strong and excitation-independent PL property because of the sp2 clusters uniform in size and well passivated by the partially carbonized PEI. Furthermore, the obtained N-GQDs show little cytotoxicity and promise in Pb2+ recognition as well as cell imaging.

Improved dispersibility of multi-wall carbon nanotubes with reversible additionfragmentation chain transfer polymer modification

Co-reporter:Chenfei Yu;Qiang Chen;Anqi Wang;Xi Zhou;Qianping Ran

Polymer International 2015 Volume 64( Issue 9) pp:1219-1224

Publication Date(Web):

DOI:10.1002/pi.4902

Abstract

A non-covalent approach is used to modify multi-wall carbon nanotubes (MWCNTs) via a block polymer that can be synthesized in aqueous solvent through reversible addition–fragmentation chain transfer polymerization. The block polymer consists of oligo(ethylene glycol) methyl ether acrylate and acrylic acid. The hydrophobic backbone is significantly adsorbed on hydrophobic MWCNT surfaces, which is verified using transmission electron microscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy. The coated block polymer can prevent the aggregation of MWCNTs and improve their dispersibility in water. The MWCNTs after modification are stable in water even after standing in a long-term test. © 2015 Society of Chemical Industry

Dopamine fluorescent sensors based on polypyrrole/graphene quantum dots core/shell hybrids

Co-reporter:Xi Zhou, Peipei Ma, Anqi Wang, Chenfei Yu, Tao Qian, Shishan Wu, Jian Shen

Biosensors and Bioelectronics 2015 Volume 64() pp:404-410

Publication Date(Web):15 February 2015

DOI:10.1016/j.bios.2014.09.038

•Novel strategy to improve the sensitivity of GQDs polymer composite sensors was developed.•PPy/GQDs with plenty oxygen-containing groups was facilely synthesized.•PPy/GQDs exhibited strong fluorescence emission intensity, which was dramatically enhanced as high as three times than pristine GQDs.•Oxygen-containing groups of PPy could adsorb the DA molecules by interaction with amine and hydroxyl functional groups in DA through hydrogen bonds.•PPy/GQDs sensor offered a nanomole level detection for DA in biological systems.A facilely prepared fluorescent sensor was developed for dopamine (DA) detection with high sensitivity and selectivity based on polypyrrole/graphene quantum dots (PPy/GQDs) core/shell hybrids. The composites exhibit strong fluorescence emission, which is dramatically enhanced as high as three times than pristine GQDs. The prepared sensor allows a highly sensitive determination of DA by fluorescent intensity decreasing with the addition of DA and presents a good linearity in range of 5–8000 nM with the detection limit of 10 pM (S/N=3). Furthermore, the application of the proposed approach have been demonstrated in real samples and showed promise in diagnostic purposes.

All-Solid-State Flexible Supercapacitors Based on Highly Dispersed Polypyrrole Nanowire and Reduced Graphene Oxide Composites

Co-reporter:Chenfei Yu, Peipei Ma, Xi Zhou, Anqi Wang, Tao Qian, Shishan Wu, and Qiang Chen

ACS Applied Materials & Interfaces 2014 Volume 6(Issue 20) pp:17937

Publication Date(Web):September 23, 2014

DOI:10.1021/am5059603

Highly dispersed polypyrrole nanowires are decorated on reduced graphene oxide sheets using a facile in situ synthesis route. The prepared composites exhibit high dispersibility, large effective surface area, and high electric conductivity. All-solid-state flexible supercapacitors are assembled based on the prepared composites, which show excellent electrochemical performances with a specific capacitance of 434.7 F g–1 at a current density of 1 A g–1. The as-fabricated supercapacitor also exhibits excellent cycling stability (88.1% capacitance retention after 5000 cycles) and exceptional mechanical flexibility. In addition, outstanding power and energy densities were obtained, demonstrating the significant potential of prepared material for flexible and portable energy storage devices.Keywords: energy storage; flexible; highly dispersed; polypyrrole nanowire; reduced graphene oxide; supercapacitors

Ultrasensitive dopamine sensor based on novel molecularly imprinted polypyrrole coated carbon nanotubes

Co-reporter:Tao Qian, Chenfei Yu, Xi Zhou, Peipei Ma, Shishan Wu, Lina Xu, Jian Shen

Biosensors and Bioelectronics 2014 Volume 58() pp:237-241

Publication Date(Web):15 August 2014

DOI:10.1016/j.bios.2014.02.081

•Novel strategy to improve the sensitivity of CNTs polymer composite sensors was proposed.•PPy/CNTs-MIPs with plenty oxygen-containing groups was facilely synthesized.•Oxygen-containing groups of PPy could establish strong hydrogen bonds with amino groups of DA.•PPy/CNTs-MIPs sensor offered a nanomole level detection for DA in biological systems.A novel electrochemical sensor using the molecularly imprinted (MIP) oxygen-containing polypyrrole (PPy) decorated carbon nanotubes (CNTs) composite was proposed for in vivo detection of dopamine (DA). The prepared sensor exhibits a remarkable sensitivity of (16.18 μA/μM) with a linear range of 5.0×10−11–5.0×10−6 M and limit of detection as low as 1.0×10−11 M in the detection of DA, which might be due to the plenty cavities for binding DA through π–π stacking between aromatic rings and hydrogen bonds between amino groups of DA and oxygen-containing groups of the novel PPy.

Highly dispersed carbon nanotube/polypyrrole core/shell composites with improved electrochemical capacitive performance

Co-reporter:Tao Qian, Xi Zhou, Chenfei Yu, Shishan Wu and Jian Shen

Journal of Materials Chemistry A 2013 vol. 1(Issue 48) pp:15230-15234

Publication Date(Web):23 Oct 2013

DOI:10.1039/C3TA13624H

Highly dispersed polypyrrole (PPy) is firstly designed for decorating onto the surface of pristine multiwalled carbon nanotubes (CNTs), then used in the facile synthesis of a CNT/PPy core/shell composite, which provides a potential application for further modification as a base-material due to its high dispersibility. The hybrid material with a PPy shell thickness of 1.61 nm displayed a high specific capacitance of 276.3 F g−1 in 1 M KCl electrolyte, four times higher than pristine CNT. Such an improvement in performance is closely correlated with the integrated advantage of the decorated PPy shell, which enhanced the dispersibility and active surface area.

A facilely prepared polypyrrole–reduced graphene oxide composite with a crumpled surface for high performance supercapacitor electrodes

Co-reporter:Tao Qian, Chenfei Yu, Shishan Wu and Jian Shen

Journal of Materials Chemistry A 2013 vol. 1(Issue 22) pp:6539-6542

Publication Date(Web):18 Apr 2013

DOI:10.1039/C3TA11146F

A polypyrrole–reduced graphite oxide core–shell composite was facilely fabricated through electrostatic interactions and π–π accumulation. This novel composite shows remarkable performance as an electrode material for supercapacitors, with a high specific capacitance of 557 F g−1 at a current density of 0.5 A g−1, and retains a high value after 1000 charge–discharge processes. The maximum energy density of the fabricated supercapacitor based on the mass of active electrodes is calculated to be 49.5 W h kg−1 and 33.3 W h kg−1 at a power density of 0.22 kW kg−1 and 6.06 kW kg−1, the improved capacitance might be mainly ascribed to higher conductivity and more crumpled surface of the composite.

Facilely prepared polypyrrole-reduced graphite oxide core–shell microspheres with high dispersibility for electrochemical detection of dopamine

Co-reporter:Tao Qian, Shishan Wu and Jian Shen

Chemical Communications 2013 vol. 49(Issue 41) pp:4610-4612

Publication Date(Web):14 Mar 2013

DOI:10.1039/C3CC00276D

Polypyrrole-reduced graphite oxide core–shell microspheres with high dispersibility were facilely fabricated and were demonstrated to be excellently sensitive for electrochemical detection of nanomolar concentrations of dopamine in the presence of a large excess of uric acid and ascorbic acid.

In situ polymerization of highly dispersed polypyrrole on reduced graphite oxide for dopamine detection

Co-reporter:Tao Qian, Chenfei Yu, Shishan Wu, Jian Shen

Biosensors and Bioelectronics 2013 50() pp: 157-160

Publication Date(Web):

DOI:10.1016/j.bios.2013.06.027

Gold nanoparticles coated polystyrene/reduced graphite oxide microspheres with improved dispersibility and electrical conductivity for dopamine detection

Co-reporter:Tao Qian, Chenfei Yu, Shishan Wu, Jian Shen

Colloids and Surfaces B: Biointerfaces 2013 Volume 112() pp:310-314

Publication Date(Web):1 December 2013

DOI:10.1016/j.colsurfb.2013.08.005

•A novel strategy to improve the sensitivity of graphene polymer composite sensors was proposed.•Gold nanoparticles coated PS/reduced graphite oxide (AuNPs@PS/RGO) microspheres were facilely prepared.•AuNPs@PS/RGO microspheres offered a nanomole level detection limit for DA with excellent sensitive and selective.•AuNPs@PS/RGO microspheres dispersed more homogeneously and stably in water comparing with graphene sheets and PS/graphene microspheres.Gold nanoparticles coated polystyrene/reduced graphite oxide (AuNPs@PS/RGO) microspheres have been successfully prepared via a facile process, and the decorative gold nanoparticles could prevent the aggregation of RGO by electrostatic repulsive interaction, and lead to high dispersibility of the composite. The prepared composite has a highly increased conductivity of 129 S m−1 due to the unique electrical properties of citrate reduced gold nanoparticles. Being employed as an electrochemical sensor for detection of dopamine, the modified electrode exhibits remarkable sensitivity (3.44 μA/μM) and lower detection limit (5 nM), with linear response in a range of 0.05–20 μM. Moreover, valid response to dopamine obtained in present work also indicates the prospective performances of AuNPs@PS/RGO microspheres to other biological molecules, such as nucleic acids, proteins and enzymes.

A facile, controllable fabrication of polystyrene/graphene core-shell microspheres and its application in high-performance electrocatalysis

Co-reporter:Shuya Li, Tao Qian, Shishan Wu and Jian Shen

Chemical Communications 2012 vol. 48(Issue 64) pp:7997-7999

Publication Date(Web):26 Jun 2012

DOI:10.1039/C2CC34411D

Polystyrene/graphene (PS/GP) core-shell microspheres which are demonstrated to be highly sensitive for dopamine (DA) detection with excellent morphology were prepared via electrostatic interactions and π–π accumulation. This interesting discovery is practical to utilise compared to traditional biotechniques and surface functionalization methods.

Facilely prepared polypyrrole-reduced graphite oxide core–shell microspheres with high dispersibility for electrochemical detection of dopamine

Co-reporter:Tao Qian, Shishan Wu and Jian Shen

Chemical Communications 2013 - vol. 49(Issue 41) pp:NaN4612-4612

Publication Date(Web):2013/03/14

DOI:10.1039/C3CC00276D

Polypyrrole-reduced graphite oxide core–shell microspheres with high dispersibility were facilely fabricated and were demonstrated to be excellently sensitive for electrochemical detection of nanomolar concentrations of dopamine in the presence of a large excess of uric acid and ascorbic acid.

Highly dispersed carbon nanotube/polypyrrole core/shell composites with improved electrochemical capacitive performance

Co-reporter:Tao Qian, Xi Zhou, Chenfei Yu, Shishan Wu and Jian Shen

Journal of Materials Chemistry A 2013 - vol. 1(Issue 48) pp:NaN15234-15234

Publication Date(Web):2013/10/23

DOI:10.1039/C3TA13624H

Highly dispersed polypyrrole (PPy) is firstly designed for decorating onto the surface of pristine multiwalled carbon nanotubes (CNTs), then used in the facile synthesis of a CNT/PPy core/shell composite, which provides a potential application for further modification as a base-material due to its high dispersibility. The hybrid material with a PPy shell thickness of 1.61 nm displayed a high specific capacitance of 276.3 F g−1 in 1 M KCl electrolyte, four times higher than pristine CNT. Such an improvement in performance is closely correlated with the integrated advantage of the decorated PPy shell, which enhanced the dispersibility and active surface area.

A facilely prepared polypyrrole–reduced graphene oxide composite with a crumpled surface for high performance supercapacitor electrodes

Co-reporter:Tao Qian, Chenfei Yu, Shishan Wu and Jian Shen

Journal of Materials Chemistry A 2013 - vol. 1(Issue 22) pp:NaN6542-6542

Publication Date(Web):2013/04/18

DOI:10.1039/C3TA11146F

A polypyrrole–reduced graphite oxide core–shell composite was facilely fabricated through electrostatic interactions and π–π accumulation. This novel composite shows remarkable performance as an electrode material for supercapacitors, with a high specific capacitance of 557 F g−1 at a current density of 0.5 A g−1, and retains a high value after 1000 charge–discharge processes. The maximum energy density of the fabricated supercapacitor based on the mass of active electrodes is calculated to be 49.5 W h kg−1 and 33.3 W h kg−1 at a power density of 0.22 kW kg−1 and 6.06 kW kg−1, the improved capacitance might be mainly ascribed to higher conductivity and more crumpled surface of the composite.

Facile synthesis of a Co3O4@carbon nanotubes/polyindole composite and its application in all-solid-state flexible supercapacitors

Co-reporter:Xi Zhou, Anqi Wang, Yumei Pan, Chenfei Yu, Yun Zou, Yang Zhou, Qiang Chen and Shishan Wu

Journal of Materials Chemistry A 2015 - vol. 3(Issue 24) pp:NaN13015-13015

Publication Date(Web):2015/05/13

DOI:10.1039/C5TA01906K

A supercapacitor electrode composed of a polyindole (PIn)-modified carbon nanotubes (CNTs) composite (CNTs/PIn) decorated with Co3O4 nanoparticles was synthesized to enhance the electrochemical performance. The PIn shell could improve the electric conductivity and the dispersion of CNTs, and the functional groups of PIn are conducive to anchoring the Co3O4 particles on the CNTs/PIn composite with large effective surface area, leading to a high specific capacitance of 442.5 F g−1. Moreover, the all-solid-state supercapacitor exhibits a high energy density (42.9 W h kg−1) at a power density of 0.4 kW kg−1 and excellent cycling performance (90.2% capacitance retention after 5000 cycles), demonstrating its promising application as an efficient electrode material for electrochemical capacitors.

A facile, controllable fabrication of polystyrene/graphene core-shell microspheres and its application in high-performance electrocatalysis

Co-reporter:Shuya Li, Tao Qian, Shishan Wu and Jian Shen

Chemical Communications 2012 - vol. 48(Issue 64) pp:NaN7999-7999

Publication Date(Web):2012/06/26

DOI:10.1039/C2CC34411D

Polystyrene/graphene (PS/GP) core-shell microspheres which are demonstrated to be highly sensitive for dopamine (DA) detection with excellent morphology were prepared via electrostatic interactions and π–π accumulation. This interesting discovery is practical to utilise compared to traditional biotechniques and surface functionalization methods.

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ABSTRACT

Abstract