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Fabrication of novel heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composites with enhanced photocatalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
45452 46412 2015 9 PDF Available
Title
Fabrication of novel heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composites with enhanced photocatalytic performance
Abstract

•The few-layered WS2 firstly combine with composites to prepare heterostructured catalysts.•Ternary heterostructured composite containing mixed-phase bismuth tungstate was studied.•The few-layer WS2-BWO exhibits good photocatalytic activity for RhB degradation.•Formation and photocatalytic mechanisms of the WS2-BWO are well proposed.

Novel heterostructured composite of few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 has been synthesized via a facile hydrothermal method for the first time. The obtained catalysts were systematically characterized by X-ray diffraction (XRD), SEM, TEM, EDS, Raman spectroscopy, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) to certify the existence of WS2 with a few-layered structure among the heterostructured composite, and to illuminate the relationship of its performance and the structural features. Among the as-prepared catalysts, the few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composite show the best photocatalytic degradation of RhB under visible light irradiation. The enhanced photocatalytic performance of the heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composite is attributed to the two-dimensional structure of WS2 with special properties and the matching energy band structure for efficient separation of photogenerated electron–hole pairs. The formation mechanism and photocatalytic mechanism were proposed. The present work firstly combined layered TMDs with composites to prepare ternary heterostructured catalysts, which provide new ideas for obtaining novel layered TMDs-based composites with excellent performance.

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Keywords
Bismuth tungstates; Few layered WS2; Heterostructured; Photocatalysis; Transition metal dichalcogenides
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Fabrication of novel heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composites with enhanced photocatalytic performance
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 220–228
Authors
, , , , , , , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us