Electrochemistry and voltammetric determination of L-tryptophan and L-tyrosine using a glassy carbon electrode modified with a Nafion/TiO2-graphene composite film

被引：1
|
作者：
Yang Fan
Jin-Hang Liu
Hai-Ting Lu
Qin Zhang
机构：
[1] Xinyang Normal University,College of Chemistry and Chemical Engineering
来源：
Microchimica Acta | 2011年 / 173卷
关键词：
Graphene; TiO; -graphene nanocomposite; Electrochemical sensor; Tryptophan; Tyrosine;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We describe a glassy carbon electrode (GCE) modified with a film composed of Nafion and TiO2-graphene (TiO2-GR) nanocomposite, and its voltammetric response to the amino acids L-tryptophane (Trp) and L-tyrosine (Tyr). The incorporation of TiO2 nanoparticles with graphene significantly improves the electrocatalytic activity and voltammetric response compared to electrodes modified with Nafion/graphene only. The Nafion/TiO2-GR modified electrode was used to determine Trp and Tyr with detection limits of 0.7 and 2.3 μM, and a sensitivity of 75.9 and 22.8 μA mM−1 for Trp and Tyr, respectively.
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页码：241 / 247
页数：6
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