A unique nanoporous graphene-ZnxCd1−xS hybrid nanocomposite for enhanced photocatalytic degradation of water pollutants. Issue 15 (15th November 2016)

• Record Type: Journal Article
• Authors: Lou, Shiyun; Wang, Wan; Jia, Xianbin; Wang, Yongqiang; Zhou, Shaomin
• Is Part Of: Ceramics international. Volume 42:Issue 15(2016)
• Page Start: 16775
• Page End: 16781
• Publication Date: 2016-11-15
• Subjects: Nanoporous -- Photocatalysis -- Graphene -- ZnxCd1−xS -- Nanocomposite; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.07.161
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, a novel in-situ solvothermal reduction route has been made to immobilize nanoporous Znx Cd1−x S aggregates on graphene nanoribbons by using PVP as a stabilizer and thiourea as a sulphur source. The nanoporous ZnxCd1−x S aggregates with diameters of 20–30 nm assembled from Znx Cd1−x S nanocrystals (3–5 nm) are homogeneously anchored on graphene nanoribbons and the unique structure of graphene-Znx Cd1−x S nanocomposites has contributed to large specific surface area (102.1 m 2 g -1 ). Despite the analogous size and configuration, the nanoporous graphene-Znx Cd1−x S hybrid nanocomposites exhibited composition-dependent photocatalytic performances for the degradation of methyl orange (MO) under visible light. In particular, graphene-Zn0.5 Cd0.5 S was capable of nearly completely degrading MO in 150 min. The excellent photocatalytic activity was proposed to arise from the synergy effect between nanoporous Znx Cd1−x S 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.