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Novel photocatalyst, Bi2Sn2O7, for photooxidation of As(III) under visible-light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
40927 45871 2012 5 PDF Available
Title
Novel photocatalyst, Bi2Sn2O7, for photooxidation of As(III) under visible-light irradiation
Abstract

Nanocrystalline Bi2Sn2O7, a visible-light photocatalyst synthesized via a facile hydrothermal route, is used to remove arsenite from aqueous solution for the first time. The as-synthesized Bi2Sn2O7 product is characterized by X-ray diffraction, N2 sorption–desorption, UV–vis diffuse reflectance spectroscopy, transmission electron microscopy, electron spin resonance, X-ray photoelectron spectra, and electrochemistry technology. The results reveal that the sample has an average particle size of approximately 10 nm, a specific surface area of 51.3 m2/g, and a band gap of 2.88 eV. Moreover, the Bi2Sn2O7 nanoparticles exhibit a high photocatalytic activity in the oxidation of As(III) (up to 96.8%) under visible-light irradiation. O2− and h+ are recognized as the primary active species responsible for As(III) oxidation. Meanwhile, a possible mechanism for the photo-oxidation of As(III) over Bi2Sn2O7 is also proposed.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (89 K)Download as PowerPoint slideHighlights► Bi2Sn2O7 is a promising photocatalyst for As(III) oxidation under visible-light. ► O2− and h+ are recognized to be the main active species in As(III) oxidization. ► A band-gap model is proposed to explain the generation mechanism of active species.

Keywords
Bi2Sn2O7; Visible-light photocatalyst; As(III) removal; Hydrothermal process
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Novel photocatalyst, Bi2Sn2O7, for photooxidation of As(III) under visible-light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 425–426, 28 May 2012, Pages 74–78
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