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Highly efficient Bi2O2CO3/BiOCl photocatalyst based on heterojunction with enhanced dye-sensitization under visible light

Paper ID Volume ID Publish Year Pages File Format Full-Text
45112 46396 2016 9 PDF Available
Title
Highly efficient Bi2O2CO3/BiOCl photocatalyst based on heterojunction with enhanced dye-sensitization under visible light
Abstract

•This is one of the few researches on photocatalytic property of Bi2O2CO3/BiOCl.•A facial approach is developed to synthesis Bi2O2CO3/BiOCl heterostructure.•The role of H2O2 in the process of dye sensitization is revealed.•This paper takes new sight on the mechanism of the photocatalytic process.

A facile approach is developed to synthesis the highly efficient photocatalyst of Bi2O2CO3/BiOCl. The composite of Bi2O2CO3/BiOCl exhibits excellent photocatalytic activity toward Rhodamine B (RhB) under visible light, which is even better than that of P25 (commercial TiO2) under UV light. The role of the active species in the process of the degradation is evaluated by using different types of active species scavengers and measurement of electron spin resonance (ESR). The relative band structures of the Bi2O2CO3 and BiOCl are determined combined with the flat potential (Vfb) and bandgap energy (Eg) evaluated by UV–vis diffuse reflectance spectra. The results show that the composite of the two semiconductors facilitates the photosensitized degradation of RhB under visible light (420 nm < λ < 800 nm). And the essence of RhB photosensitization is revealed to be the increase of H2O2 in the reaction system. The photocatalytic mechanism is further proposed, which unfolds the charge transfer and the active species formed in the photcatalytic process. The work may set foundation for application of the new photocatalyst of Bi2O2CO3-based heterostructure.

Graphical abstractHeterostructure of Bi2O2CO3/BiOCl with excellent photocatalytic activity under visible light which is even better than that of P25 under UV light.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Bi2O2CO3/BiOCl; Photocatalyst; Heterostructure; Dye-sensitization; Visible light
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Highly efficient Bi2O2CO3/BiOCl photocatalyst based on heterojunction with enhanced dye-sensitization under visible light
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 187, 15 June 2016, Pages 301–309
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