Meiye Li

Publications (3)0 Total impact

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  Available from: Yuanjian Zhang

  Article: Direct electron transfer of horseradish peroxidase and its electrocatalysis based on carbon nanotube/thionine/gold composites

  Zhijuan Wang, Meiye Li, Pingping Su, Yuanjian Zhang, Yanfei Shen, Dongxue Han, Ari Ivaska, Li Niu
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  ABSTRACT: Horseradish peroxidase (HRP) was incorporated into multiwalled carbon nanotube/thionine/Au (MTAu) composite film by electro-static interactions between positively charged HRP and negatively charged MTAu composite. The results of electrochemical impedance spectroscopy (EIS) confirmed adsorption of HRP on the surface of MTAu modified GC electrode. Moreover, the electrochemical results showed that HRP retained its bioactivity and bioelectrocatalytical activity, and also showed good direct electron transfer behavior on such a composite film.
  01/2008;
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  Available from: Yuanjian Zhang

  Article: Thionine-interlinked multi-walled carbon nanotube/gold nanoparticle composites

  Zhijuan Wang, Meiye Li, Yuanjian Zhang, Junhua Yuan, Yanfei Shen, Li Niu, Ari Ivaska
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  ABSTRACT: Multi-walled carbon nanotube (MWCNT)/thionine/gold nanoparticle composites were prepared by binding gold nanoparticles to the surfaces of thionine-coated carbon nanotubes. TEM images show gold nanoparticles distributed uniformly on nanotube walls and ends. UV–Vis, Raman, FT-IR, and zeta potential measurements were used to examine the properties of the resulting products. The composites demonstrate significant electrocatalytic activity for oxygen reduction. Although only gold nanoparticles were investigated here, the method could be easily extended to attach other metallic nanoparticles to the sidewalls of carbon nanotubes.
  Carbon.
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  Available from: Yuanjian Zhang

  Article: Electropolymerization and catalysis of well-dispersed polyaniline/carbon nanotube/gold composite

  Zhijuan Wang, Junhua Yuan, Meiye Li, Dongxue Han, Yuanjian Zhang, Yanfei Shen, Li Niu, Ari Ivaska
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  ABSTRACT: Polyaniline/multi-walled carbon nanotube/gold (PANI/MWNT/Au) composite film was synthesized via a two-step electrochemical process. First the mixture of aniline and MWNT was heated at refluxing and was electropolymerized. Then, the Au nanoparticles were dispersed into the film of PANI/MWNT by electrochemical reduction of HAuCl4. The morphology of sample was analyzed by scanning electron microscopy (SEM). Raman measurement indicates a well electrochemical deposition of PANI on MWNT, and XPS result confirms the formation of Au0 nanoparticles. Further, cyclic voltammograms show that the film exhibits a good electrochemical activity and electrocatalysis towards ascorbic acid. Based on these investigations, a formation mechanism of the PANI/MWNT composite film was proposed.
  Journal of Electroanalytical Chemistry.