期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 828, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154449
关键词
ZnO/ZnFe2O4/PbS; Core/shell heterostructure; Nanoarray film; Photoanode; Photoelectrochemical water splitting
资金
- National Natural Science Foundation of China [51772079]
- Natural Science Foundation of Heilongjiang Province of China [B2017009]
The construction of a uniform heterojunction photoelectrode with rational band alignment and component control has been proved to improve the performance of photoelectrochemical water splitting. Here we prepared ZnO nanorod/ZnFe2O4 nanosheet core/shell nanoarray photoanodes, and PbS quantum dots were further decorated to promote charge transport and act as light absorber. The optimized ZnO/ZnFe2O4/PbS photoanode displays a significantly enhanced photocurrent density and excellent photoelectrochemical stability, and its photoconvertion efficiency is 1.34 and 3.54 times higher than that of ZnO/ZnFe2O4 and ZnO nanorod array photoanodes, respectively, and 87.4% of the initial photocurrent density is obtained after 2 h light irradiation. This work provides a facile strategy for the design of highly efficient and stable photoelectrodes in photoelectrochemical water splitting. (c) 2020 Elsevier B.V. All rights reserved.
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