期刊
ELECTROCHIMICA ACTA
卷 83, 期 -, 页码 478-484出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.08.008
关键词
SnO2; High-index facet; 1-Naphthol
资金
- National Natural Science Foundations of China (NSFC) [21077077, 21107081]
- 863 Program [2008AA06Z329]
- Sino-America International Science and Technology Cooperation Fund [S2010GR0331]
- Fundamental Research Funds for the Central Universities
SnO2 nanooctahedron with {2 2 1} high-index facet (HIF) was synthesized by a simple hydrothermal method, and was firstly employed to sensitive electrochemical sensing of a typical organic pollutant, 1-naphthol (1-NAP). The constructed HIF SnO2 modified glassy carbon electrode (HIF SnO2/GCE) possessed advantages of large effective electrode area, high electron transfer rate, and low charge transfer resistance. These improved electrochemical properties allowed the high electrocatalytic performance, high effective active sites and high adsorption capacity of 1-NAP on HIF SnO2/GCE. Cyclic voltammetry (CV) results showed that the electrochemical oxidation of 1-NAP obeyed a two-electron transfer process and the electrode reaction was under diffusion control on HIF SnO2/GCE. By adopting differential pulse voltammetry (DPV), electrochemical detection of 1-NAP was conducted on HIF SnO2/GCE with a limit of detection as low as 5 nM, which was relatively low compared to the literatures. The electrode also illustrated good stability in comparison with those reported value. Satisfactory results were obtained with average recoveries in the range of 99.7-103.6% in the real water sample detection. A promising device for the electrochemical detection of 1-NAP with high sensitivity has therefore been provided. (C) 2012 Elsevier Ltd. All rights reserved.
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