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›› 2002, Vol. 2 ›› Issue (4): 0-0.

• 4 •    

含超细Au颗粒的乳酸氧化酶和葡萄糖氧化酶生物传感器

孟宪伟，高凤堂，任湘菱，韦正，唐芳琼   

  1. 中国科学院理化技术研究所, 北京 100101
  • 出版日期:2002-08-20 发布日期:2002-08-20

Electrocatalytic Activity of Ti/TiO2 Electrodes in H2SO4 Solution

WANG Ya-qiong(王雅琼),TONG Hong-yang(童宏扬),XU Wen-lin(许文林)   

  1. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
  • Online:2002-08-20 Published:2002-08-20

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被引次数

80

摘要： 制备了小于10 nm的金颗粒，并利用其进行固定化葡萄糖氧化酶和乳酸氧化酶的研究. 实验发现，金纳米颗粒可以大幅度提高葡萄糖氧化酶电极和乳酸氧化酶电极的电流响应，响应电流从相应浓度的几十纳安增强到几千纳安. 探讨了金纳米颗粒在固定化酶中所起的作用.

关键词: 固定化酶, 葡萄糖氧化酶, 乳酸氧化酶, 金纳米颗粒

Abstract: Ti/TiO2 electrodes were prepared with the polymeric precursor method (PPM). The structure and morphology of Ti/TiO2 electrodes were examined with XRD and ESEM. The voltammetric charge (q*) of Ti/TiO2 electrodes as cathode in 0.5 mol/L H2SO4 solution was investigated with cyclic voltammetry. It was found that the electrocatalytic activity of the Ti/TiO2 electrodes was affected by the structure and morphology of the Ti/TiO2 electrodes, in other words, was affected by the calcination conditions of preparing the electrodes. The value of q*in was considerably larger than that of q*out, which means that the ‘inner’ active surface area was much larger than the ‘outer’ active surface area, and ‘inner’ active surface played a main role in the electrocatalytic activity of the Ti/TiO2 electrodes.

Key words: voltammetric charge, active surface, TiO2 electrode, electrochemistry

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