Journal
ELECTROCHIMICA ACTA
Volume 367, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.137453
Keywords
Photoelectrochemical sensor; 4-NP; Ni/Cu2O; Photocathode
Categories
Funding
- National Natural Science Foundation of China [21671083, 21701056]
- Open Project of State Key Laboratory of Rare Earth Resource Utilizations [RERU2018011]
- Jiangsu Provincial Six Talent Peaks [XCL-019]
- Youth Foundation of Jiangsu Scientific Committee [BK20170531]
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A sensitive/visible light-driven PEC sensor system was established for selectively detecting 4-NP using a Ni/Cu2O photocathode. The Ni/Cu2O photocathode exhibited excellent PEC reduction capacity for ultra-sensitive sensing of trace amounts of 4-NP under illumination.
As a typical toxic pollutant, 4-nitrophenol (4-NP) has caused a serious threat to environment. Therefore, rapid and selective detection of 4-NP, especially designing a simple and portable instrument, is significant for environmental protection and remediation. Herein, a sensitive/visible light-driven photoelectrochemical (PEC) sensor system was reasonably established for selectively detecting 4-NP via a simple Ni/Cu2O photocathode. The Ni/Cu2O photocathode exhibits the excellent PEC reduction capacity for ultra-sensitive sensing the trace 4-NP under illumination. Under optimized conditions of PEC determination, the photocurrent could be well linear with 4-NP concentration in the range of 0 to 37.5 mu M, with a low detection limit of 16.0 M. More importantly, the proposed cheap and easily recoverable Ni/Cu2O photocathode would be potentially applied for practical cathodic PEC detection of 4-NP in water samples, and act as a feasible platform for PEC degradation and mechanism analysis of other toxic chemical pollutants. (C) 2020 Elsevier Ltd. All rights reserved.
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