期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 265, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2021.118487
关键词
Type-II hybrid Z-scheme; In2O3; TiO2; Cu2O; Tetracycline degradation
资金
- National Natural Science Foundation of China [52072197, 51772162]
- Taishan Scholar Young Talent Program [tsqn201909114]
The ternary In2O3/TiO2/Cu2O photocatalyst prepared by annealing and electrodeposition exhibited high degradation efficiency towards tetracycline under visible light irradiation, showing excellent photocatalytic activity. It had n-n type-II hybrid Z-scheme electron transfer pathways, providing a mechanism foundation for its high photocatalytic performance.
In this work, a ternary In2O3/TiO2/Cu2O photocatalyst was prepared using simple annealing of In-MIL-68/TBOT, followed by electrodeposition of Cu2O. The prepared photocatalyst had a hollow structure and its components were in intimate contacts, which endow it with numerous catalytic active sites while facilitating the migration and separation of charge carriers. The In2O3/TiO2/Cu2O-600 had the highest photon fluence rate in degradation of tetracycline under visible light irradiation. Its apparent rate constant (k) was 0.0293 min(-1), 7.2 and 3.8 times higher than that of In2O3 and In2O3/TiO2, respectively. The photoelectrochemical measurements and radical (h(+) and center dot O-2(-)) trapping experiments revealed that the prepared photocatalyst had the n-n type-II hybrid Z-scheme electron transfer pathways, which was the mechanism responsible for its high photocatalytic activity. This study provides a new insight into synthesis of type-II hybrid Z-scheme ternary heterostructures which may have potential applications in environmental remediation.
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