Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 862, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.158271
Keywords
Si-alpha-Fe2O3 nanosheet; Si-alpha-Fe2O3/CdS; p-nitrophenol; Photocatalytic degradation
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Funding
- National Natural Science Foundation of China [21477032, 21277040]
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Si-alpha-Fe2O3/CdS composites with highly exposed (110) facets exhibited enhanced visible-light photocatalytic activity due to the construction of the heterojunction, which effectively inhibits the recombination of photogenerated electron-hole pairs.
Si-hematite (alpha-Fe2O3) nanosheets with highly exposed (110) facets were obtained first, and Si-alpha-Fe2O3/CdS composites were developed using a well-designed hydrothermal method. The prepared Si-alpha-Fe2O3/CdS composites showed enhanced visible-light photocatalytic activity compared with Si-alpha-Fe2O3 and CdS. The construction of the Si-alpha-Fe2O3/CdS heterojunction can inhibit the recombination of the photogenerated electron-hole pairs on the catalyst surface effectively. The synergistic effects of the photo-Fenton and the heterojunction promoted the production of the active species in the Si-alpha-Fe2O3/CdS system and enhanced the photocatalytic degradation activity under visible-light irradiation. The SFC-1:1 composite exhibited the highest photocatalytic activity toward p-nitrophenol degradation. The photocatalytic degradation mechanism was also investigated. (C) 2020 Elsevier B.V. All rights reserved.
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