期刊
ANALYST
卷 138, 期 4, 页码 1167-1173出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an36605c
关键词
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资金
- Natural Science Foundation of China [20875080, 21075107, 21005070, 21275124, 21275125]
- Natural Science Foundation of Jiangsu Province [BK2012247]
- Foundation of International Cooperation of Jiangsu Province [BZ2010053]
- Foundation of Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province [AE201017, AE201162]
- Talent Introduction Foundation of Yancheng Institute of Technology [kjc2012051]
An indirect photoelectrochemical sensing platform for toxic hexavalent chromium was for the first time constructed based on its redox reaction with quercetin as both the electron donor and photosensitizer on a TiO2 photoanode, and thus inhibiting the photocurrent quantitatively and selectively. The presence of even 500-fold coexisting Cr(III) does not interfere in the detection of Cr(VI). Under the optimum conditions, the electrode displayed a linear decrease response as the Cr(VI) concentration increased from 1 to 10 nmol L-1 and from 20 to 140 nmol L-1 with a detection limit of 0.24 nmol L-1. Many possible ions in drinking water did not interfere with the detection, and the real sample detection results agreed well with those obtained by GFAAS. This work provide a novel methodology for the simple, low-cost photoelectrochemical detection of Cr(VI) in drinking water.
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