Preparation of Ce-PbO(2) modified electrode and its application in detection of anilines.
Preparation of Ce-PbO(2) modified electrode and its application in detection of anilines.
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DOI：
10.1016/j.talanta.2003.08.019
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发表时间：
2004-02
期刊：
影响因子：
6.1
通讯作者：
S. Ai;M. Gao;Wen Zhang;Qingjiang Wang;Yunfengl Xie;L. Jin
中科院分区：
文献类型：
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作者：
S. Ai;M. Gao;Wen Zhang;Qingjiang Wang;Yunfengl Xie;L. Jin
研究了Ce(III)对二氧化铅(PbO2)修饰电极形貌和结构的影响。循环伏安、X射线衍射仪和扫描隧道显微镜测试结果表明，Ce掺杂PbO2薄膜由α-和β-PbO2两种晶相组成，且α相的含量高于未掺杂的PbO2薄膜。通过掺杂Ce，在电极表面形成了纳米尺寸的PbO2晶体。从而提高了修饰电极的比表面积和催化活性中心。因此，Ce-PbO2修饰电极的催化活性明显高于未掺杂PbO2修饰电极。将Ce-PbO2修饰电极作为分析传感器用于苯胺类化合物的测定，线性范围为5×10−5~1×10−3mol/L，检出限为1×10−5mol/L。
The effect of Ce(III) on the morphology and structure of lead dioxide (PbO2) modified electrode was studied in this paper. The results obtained by cyclic voltammetry (CV), X-ray diffractometion (XRD) and scanning tunneling micrograph (STM) indicated that the Ce-doped PbO2film consisted of a mixture of α- and β-PbO2crystallographic phases and the content of α-phase was higher than that in undoped PbO2film. PbO2crystal grains in nanometric size were formed on the electrode surface by doping with Ce. So that the specific surface areas and catalytic active sites of the modified electrode were increased. Hence the catalytic activity of the Ce-PbO2modified electrode was evidently greater than the undoped PbO2modified electrode. When the Ce-PbO2modified electrode was applied as an analytical sensor to determine aniline compounds, the linearity was in the range of 5×10−5to 1×10−3mol/l and the detection limit was 1×10−5mol/l.