期刊
CERAMICS INTERNATIONAL
卷 42, 期 15, 页码 16775-16781出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.07.161
关键词
Nanoporous; Photocatalysis; Graphene; ZnxCd1-xS; Nanocomposite
资金
- Key Project of Education Department of Henan Province [14B430010]
- Fundamental and Frontier Research Project of Henan Province [162300410040]
- National Natural Science Foundation of China [21371049, 51372070]
- Changjiang Scholars and Innovative Research Team in University [PCS IRT1126]
In this work, a novel in-situ solvothermal reduction route has been made to immobilize nanoporous ZnxCd1-xS aggregates on graphene nanoribbons by using PVP as a stabilizer and thiourea as a sulphur source. The nanoporous ZnxCd1-xS aggregates with diameters of 20-30 nm assembled from ZnxCd1-xS nanocrystals (3-5 nm) are homogeneously anchored on graphene nanoribbons and the unique structure of graphene-ZnxCd1-xS nanocomposites has contributed to large specific surface area (102.1 m(2)g(-1)). Despite the analogous size and configuration, the nanoporous graphene-ZnxCd1-xS hybrid nano composites exhibited composition-dependent photocatalytic performances for the degradation of methyl orange (MO) under visible light. In particular, graphene-Zn0.5Cd0.5S was capable of nearly completely degrading MO in 150 min. The excellent photocatalytic activity was proposed to arise from the synergy effect between nanoporous ZnxCd1-xS aggregates and graphene, the suitable band gap, intimate interfacial contact, and unique nanoporous structure. Moreover, the work provides a simple strategy to prepare various nanoporous graphene-semiconductor nanocomposites. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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