期刊论文

Detection of Tartrazine Based on TiO2/Electrochemically Reduced Graphene Composites Modified Electrode

中文

湖南工业大学学报

1673-9833

2018

10

3

25-33

10.3969/j.issn.1674-7100.2018.03.004

61703152:国家自然科学基金 2016JJ4010:湖南省自然科学基金 2018JJ3134:湖南省自然科学基金 201707-201806:科技计划 GD16K02:衡阳师范学院省级平台开放基金资助项目

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为了检测食品中柠檬黄的含量,利用滴涂法和电化学还原法制备纳米TiO2/还原石墨烯复合修饰玻碳电极（TiO2-Er GO/GCE）。采用透射电子显微镜和X射线粉末衍射仪对TiO2和TiO2-GO两种修饰电极材料进行表征;通过循环伏安法观察了柠檬黄在不同电极上的电化学行为,并对检测条件如p H值、富集电位、富集时间进行了优化。实验结果表明:TiO2-Er GO/GCE增大了电极的电化学活性面积,提高了柠檬黄的电化学氧化响应;最优的检测条件为p H值为3.7、富集电位为-0.20 V、富集时间为180 s;在最优的检测条件下,采用线性扫描伏安法检测柠檬黄的线性范围为2.0×10-82.0×10-5 mol/L,检测限为8.0×10-9 mol/L（信噪比为...

TiO2/electrochemically reduced graphene composite modified glassy carbon electrode(TiO2-ErGO/GCE)for the purpose of sensitive detection of Tartrazine was prepared by dropping-casting followed by an electrochemical reduction method.The prepared material was characterized by transmission electron microscopy(TEM)and X-ray diffraction(XRD).Cyclic voltammetry and second-order derivative linear scan voltammetry were performed for analyzing the electrochemical sensing of tartrazine on different electrodes.The determination conditions(including pH valu...