Design and preparation of SnO2/SnS2/conjugated polyvinyl chloride derivative ternary composite with enhanced visible-light photocatalytic activity. (October 2019)

• Record Type: Journal Article
• Authors: Su, Yan; Wang, Caixia; Zhang, Yongcai; Yang, Zhanjun; Dionysiou, Dionysios D.
• Is Part Of: Materials research bulletin. Volume 118(2019)
• Publication Date: 2019-10
• Subjects: A. Composites -- A. Nanostructures -- B. Chemical synthesis -- C. Raman spectroscopy -- D. Catalytic properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2019.110524
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Design and preparation of SnO2 /SnS2 /CPVC ternary composite as photocatalyst. SnO2 /SnS2 /CPVC shows synergistically enhanced photoinduced charge separation. SnO2 /SnS2 /CPVC has far higher visible-light photocatalytic activity. SnO2 /SnS2 /CPVC shows good photocatalytic reusability and stability. Useful for the development of new efficient ternary composite photocatalysts. Abstract: A new high-efficiency ternary composite photocatalyst (SnO2 /SnS2 /conjugated polyvinyl chloride derivative (CPVC)) was designed based on the hypothesis that any two of its components can constitute type-II heterojunction, and its three components should have synergistic effect on the enhancement of photoinduced charge separation. SnO2 /SnS2 /CPVC ternary composite was prepared adopting an easy-to-implement four-step synthesis method. Photoluminescence and electrochemical impedance spectra showed that SnO2 /SnS2 /CPVC is more efficient than SnO2 /SnS2, SnS2 /CPVC, SnO2 /CPVC and SnS2 in the separation and transfer of photoinduced charges. Results from their photocatalytic reduction of Cr(VI) under visible-light irradiation indicated that SnO2 /SnS2 /CPVC has significantly higher visible-light photocatalytic activity than SnO2 /SnS2, SnS2 /CPVC, SnO2 /CPVC, SnS2, CPVC and SnO2 . Moreover, SnO2 /SnS2 /CPVC also demonstrated good photocatalytic reusability and stability. This study not only has developed a new high-activity visible-light photocatalyst (SnO2 /SnS2 /CPVC), but is also useful for the design of other new ternary composite photocatalysts with synergistically enhanced visible-light photocatalysis.