Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 48, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1007/s11664-019-07553-4
Keywords
ZnO; ZnIn2S4; photoelectrochemical; heterojunction; nanorod
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Funding
- Natural Science Foundation of Jiangsu Province [BK20160262]
- Natural Science Foundation of Jiangsu Higher Eduction Institutions [18KJD430009]
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Highly ordered ZnO nanorod arrays (NRAs) were prepared via a facile ion-exchange route for the photoelectrochemical (PEC) application. Then, ZnO NRAs were modified with ZnS and ZnIn2S4, respectively, through using a hydrothermal treatment method again. It was found that both the ZnS and ZnIn2S4 modifications were in favor of enhancing the PEC activity of ZnO NRAs, although there were no obvious enhancements in the visible-light absorption. Thus, the enhancement was attributed to both the efficient charge separation and excellent electrocatalytic activity of ZnIn2S4. The Mott-Schottky (M-S) plots of two samples were compared and analyzed for clarifying the intrinsic mechanism. A schematic band model has also been proposed for clarifying the charge transfer process in a heterojunction.
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