Thin film trichloroethylene electrochemical sensor

被引:11
作者
Chen, MH
Liu, CC
Chou, TC [1 ]
机构
[1] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan
[2] Case Western Reserve Univ, Ctr Elect Design, Cleveland, OH 44106 USA
关键词
trichloroethylene; sensor; electrodeposited Pb-modified Pt-Ti thin film;
D O I
10.1016/j.bios.2004.01.017
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Pt-Ti and Pb-Pt-Ti thin films were deposited on alumina substrates by sputtering in Ar gas. In this study, an electrodeposited Pb-modified Pt-Ti thin film working electrode was prepared. Optimal sensing conditions were found to be -2.10 V (versus Ag/Ag+ with 0.1 M tetrabutylammonium perchlorate (TBAP) in acetonitrile (AN) solution) sensing potential, 250 rpm agitation rate. At room temperature, the response time was 15 s (90% response time). The correlation of sensing response current, id, and trichloroethylene (TCE) concentration, C-L, is i(d) = 2.86C(L) in the range from 100 to 700 ppm TCE. Additionally, the rate constant of (TCE) cathodic reduction was found to be 2.434 x 10(-3) cm(-3) s(-1). (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:25 / 32
页数:8
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