文献类型：期刊文献

英文题名：Bismuth-based porous screen-printed carbon electrode with enhanced sensitivity for trace heavy metal detection by stripping voltammetry

作者：Chen, Chen[1,2];Niu, Xiangheng[1,2];Chai, Yan[1,2];Zhao, Hongli[4];Lan, Minbo[1,2,3]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, Inst Appl Chem, Shanghai 200237, Peoples R China

年份：2013

卷号：178

起止页码：339

外文期刊名：SENSORS AND ACTUATORS B-CHEMICAL

收录：;EI(收录号：20130515972803);WOS:【SCI-EXPANDED(收录号:WOS:000315751100045)】；

基金：Research grant provided by Science and Technology Commission of Shanghai Municipality (STCSM, contract no. 10391901600) and Ministry of Education of the People's Republic of China (contract no. WK1014051) are acknowledged.

语种：英文

外文关键词：Porous screen-printed carbon electrode; Bismuth film; Stripping voltammetry; Lead(II); Cadmium(II)

摘要：Here we report a new disposable bismuth-coated porous screen-printed carbon electrode (Bi-P-SPCE) for trace heavy metal ions detection. The Bi-P-SPCE was fabricated by two processes: firstly, the porous screen-printed carbon electrode (P-SPCE) was prepared by combing a printing procedure of a graphite-based layer doped with CaCO3 powders with a subsequent dissolution of these powders; secondly, a Bi film layer was formed on the P-SPCE by in situ electrodepositing Bi(III) along with accumulating analytes. Due to the rough surface, large active area and low background noise of P-SPCE, the electrode exhibited significantly enhanced sensitivity, for lead(II) and cadmium(II) detection compared to screen-printed carbon electrode (SPCE) and glassy carbon electrode (GCE). With a preconcentration at -1.2 V (vs. Ag/AgCl) for 300 s, the detection limits obtained on the proposed Bi-P-SPCE are 0.03 mu g/L and 0.34 mu g/L (S/N = 3) for lead(II) and cadmium(II), respectively. This easy-to-prepare and low-cost electrode was also successfully applied to real water sample analysis. (c) 2013 Elsevier B.V. All rights reserved.