期刊
ELECTROCHIMICA ACTA
卷 319, 期 -, 页码 10-17出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.06.146
关键词
Bi microspheres; Carbon nitride; SPR; PEC; Bisphenol A
资金
- National Natural Science Foundation of China [21705058, 21703086]
- Provincial Natural Science Foundation of Jiangsu [BK20170524]
- Six Talent Peaks Project of Jiangsu Province [XNY-009]
- China Postdoctoral Science Foundation [2018T110450]
- High-tech Research Key laboratory of Zhenjiang [SS2018002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Research Foundation of Jiangsu University [17JDG007]
Considering severe threat of bisphenol A (BPA) to environment and human health, it is urgent to develop a convenient and specific method for accurately detecting BPA. An efficient photoelectrochemical (PEC) aptasensor for determining BPA in water is constructed using Bi microspheres/carbon nitride (Bi/CN) heterojunction as a PEC material. The promoting effect of Bi on the enhanced PEC performance of Bi/CN heterojunction is initiated by two unique effects: the construction of heterojunction (heterojunction effect) and surface plasmon resonance (SPR) effect. For heterojunction effect, a metal-semiconductor heterojunction of Bi/CN is constructed, which increases the light absorption of CN, generates more electron-hole pairs and accelerates the separation of carriers. Simultaneously, as a plasmonic metal, Bi microspheres accelerate charge transfer generated from the heterojunction. This function of Bi is of high benefit to suppress the electron-hole recombination, leading to an enhanced PEC performance. Benefiting from enhanced PEC performance of the heterojunction, a sensitive PEC aptasensor for detecting BPA is realized. This work demonstrates that the Bi/CN heterojunction amplified photoelectric conversion strategy can be used as an efficient method for Bi-based materials to significantly enhance the PEC performance and also provides more opportunities for application of Bi-based materials in PEC field. (C) 2019 Elsevier Ltd. All rights reserved.
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