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Facile composition-controlled preparation and photocatalytic application of BiOCl/Bi2O2CO3 nanosheets

Paper ID Volume ID Publish Year Pages File Format Full-Text
45956 46427 2014 10 PDF Available
Title
Facile composition-controlled preparation and photocatalytic application of BiOCl/Bi2O2CO3 nanosheets
Abstract

•A facile composition-controlled preparation method of BiOCl/Bi2O2CO3 was presented.•BiOCl/Bi2O2CO3 shows excellent photocatalytic activity under simulated sunlight.•Synergistic effect of BiOCl and Bi2O2CO3 enhances efficient separation of carriers.•Separation mechanism of photo-induced carriers over BiOCl/Bi2O2CO3 was investigated.•Such Bi-based composite has a promising practical application in photocatalysis.

The BiOCl, BiOCl/Bi2O2CO3 composites and Bi2O2CO3 were successfully fabricated by a facile composition-controlled preparation technology at room temperature for the first time. The X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) adsorption isotherm, UV–vis diffuse reflectance spectra (UV–vis DRS) and first-principles methods were employed to characterize the phase structures, morphologies, surface areas, optical properties, and photocatalytic mechanism of as-prepared samples. The BiOCl/Bi2O2CO3 composites exhibited the higher photocatalytic activity than individual BiOCl and Bi2O2CO3 for the degradation of MO under simulated sunlight irradiation. The COD removal efficiency of MO solution over BiOCl/Bi2O2CO3 composite achieved 95% after 8 h reaction time. In addition, the formation mechanism and excellent photocatalytic activity of BiOCl/Bi2O2CO3 composite have been investigated and discussed in detail. The enhanced photocatalytic performance of BiOCl/Bi2O2CO3 composites is closely related to the suitable conduction band (CB) interaction and efficient separation of photo-induced electron-hole pairs by the synergistic effect of BiOCl and Bi2O2CO3 under the simulated sunlight irradiation. Combined with the theoretical and experimental findings, the photocatalytic mechanism of BiOCl/Bi2O2CO3 composite and the charge carrier transfer process between Bi2O2CO3 and BiOCl semiconductors have been proposed and investigated.

Graphical abstractThe schematic diagram for preparing BiOCl, BiOCl/Bi2O2CO3, and Bi2O2CO3 samples by a facile method with controlling the concentration of NaOH.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Composition-controlled synthesis; BiOCl/Bi2O2CO3; Photocatalytic activity; Electron-hole separation; First-principles calculation
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Facile composition-controlled preparation and photocatalytic application of BiOCl/Bi2O2CO3 nanosheets
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 150–151, 5 May 2014, Pages 486–495
Authors
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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