Journal
APPLIED SURFACE SCIENCE
Volume 556, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.149695
Keywords
ZnO/ZnS/MoS2; Piezoelectric; Photocatalysis; Dual heterojunction
Categories
Funding
- National Key R&D Program of China [2017YFA0304203]
- National Natural Science Foundation of China [61901249, 62020106014, 6201153004]
- PCSIRT [IRT_17R70]
- 111 Project [D18001]
- Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (OIT)
- Applied Basic Research Project of Shanxi Province, China [201901D211191, 201901D211188]
- Innovation Project of Graduate Education in Shanxi [2020SY058]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [2019L0002]
- Shanxi 1331 KSC
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A ternary piezoelectric photocatalyst consisting of ZnO, ZnS and MoS2 nanostructures has been synthesized, showing efficient degradation of pollutants and good stability during multiple cycles.
The recombination of photogenerated charge carriers hinder the application of photocatalyst. In this study, ternary piezoelectric photocatalyst consisting of ZnO, ZnS and MoS2 nanostructures has been synthesized by a two-step hydrothermal method, which exhibits excellent piezo-photocatalytic efficiency while degrading methylene blue (MB). The piezo-photocatalytic degradation efficiency of MB is similar to 2.5 times of that without piezoelectricity. Moreover, the ZnO/ZnS/MoS2 nanocomposites exhibit good piezo-photocatalytic stability; after 5 cycles, the efficiency remains at similar to 80% of the initial value. This mechanism can be attributed to the coupling effect of piezoelectricity, photocatalysis and dual heterojunctions, as verified by ESR and diagrammed by band energy structure.
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