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標題: Photoelectrochernical oxygen copper-plated screen-printed sensor using carbon electrodes
作者: Zen, J.M.
Song, Y.S.
Chung, H.H.
Hsu, C.T.
Kumar, A.S.
關鍵字: flow-injection analysis;oxide thin-films;dissolved-oxygen;hydrogen-peroxide;reduction;cu2o
Project: Analytical Chemistry
期刊/報告no:: Analytical Chemistry, Volume 74, Issue 23, Page(s) 6126-6130.
We report here an efficient photocatalytic amperometric sensor for the determination of dissolved oxygen (DO) in phosphate buffer solution using a disposable copper-plated screen-printed carbon electrode (CuSPE). The photoelectrochemical activity toward DO of the CuSPE was related to the formation of a p-type semiconductor (Cu2O)-O-I The solution pH and biased potential (E-bias) were systematically optimized as pH 8 PBS and -0.7 V vs Ag/ AgCl, respectively. Under optimized conditions, the calibration plot was linear in the range of 1-8 ppm with sensitivity and regression coefficient of 23.51 (muA cm(2))(-1) ppm(-1) and 0.9982, respectively. The reproducibility of the system was good with seven successive measurements of DO yielding a RSD value of 1.87%. Real sample assays for groundwater and tap water were also consistent with those measured by a commercial DO meter. The principle used in DO measurement has an opportunity to extend into various research fields.
ISSN: 0003-2700
DOI: 10.1021/ac020058r
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