Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 200, Issue -, Pages 19-30Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2016.06.070
Keywords
Photocatalysis; SnOx/Zn2SnO4; Heterojunction; Benzene degradation
Funding
- Natural Science Foundation of China (NSFC) [21473066, 51472005, 51272081]
- Natural Science Foundation of Anhui Province [1408085QB38, 1608085QB37]
- High Education Revitalization Plan of Anhui Province
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Zn2SnO4 (ZTO) based composites have a promising application in photocatalysis. Developing a facile route to prepare high performance ZTO based photocatalyst is still required. A one-pot hydrothermal method was developed in this work to prepare SnOx/ZTO (SZTO-H) for the first time. Several characterization techniques were used to investigate its composition, structure, optical property, and morphology. The results indicated that SnOx component is SnO2 accompanied by a trace amount of Sn2O3. A type-II heterojunction is formed at the interface of SnOx, and ZTO, which leads to a wide separation of photo induced electrons (e(-)) and holes (h(+)). Thus, compared to pristine SnO2 and ZTO, a higher and more stable photocatalytic activity was observed on SZTO-H. Although similar SnO2/ZTO composites could be prepared by solid-state reaction routes (SSRs), their activities are substantially lower than SZTO-H as the surface areas were significantly reduced and some surface defects were introduced. The photocatalytic performance of SZTO-H is even superior to P25. Besides ZTO, we believe that the developed synthesis strategy is also applicable to the preparation of other ternary oxides based composites like SnOx/ZnGa2O4 and SnO2/Mg2SnO4. (C) 2016 Elsevier B.V. All rights reserved.
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