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Nanoscale calcium bismuth mixed oxide with enhanced photocatalytic performance under visible light

Paper ID Volume ID Publish Year Pages File Format Full-Text
42083 45910 2010 7 PDF Available
Title
Nanoscale calcium bismuth mixed oxide with enhanced photocatalytic performance under visible light
Abstract

The objective of materials research is the development of economical, safe and efficient synthesis routes that lead to the formation of a photocatalyst which is able to overcome performance problems related to particle size, crystallinity, or low surface area. Here, we report high-quality functional nanoparticles of calcium bismuth mixed oxide with 15 nm nominal size corresponding to a specific surface area of 41 m2/g which were produced by single-step flame spray synthesis (FSS). The high temperature of the flame afforded creation of oxygen vacancies which were quantified by near edge X-ray absorption fine structure (NEXAFS) spectra. These two parameters, developed active surface area and created in the flame oxygen vacancies, allowed to enhance the photocatalytic activity of calcium bismuth oxide by a factor of 6, in comparison to previously reported calcium bismuth mixed oxide produced by conventional methods which required additional temperature treatment steps.

Graphical abstractA significant decrease in particle size of calcium bismuth mixed oxide, a promising photocatalyst has been achieved by a single-step flame spray synthesis. This provided high-quality functional nanoparticles nominally 15 nm in size, with a specific surface area of 41 m2/g. The preparation route afforded oxygen vacancies which enhanced the photocatalytic activity of calcium bismuth oxide and extended the absorption spectrum to the visible region.Figure optionsDownload full-size imageDownload high-quality image (35 K)Download as PowerPoint slide

Keywords
FSS, flame spray synthesis; RDOC, relative degree of crystallinity; SSA, specific surface area; FWHM, full width at half maximum; NEXAFS, near edge X-ray absorption fine structure; MB, methylene blue; MeOH, methanolFlame spray synthesis; Mixed oxide; Nano
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Nanoscale calcium bismuth mixed oxide with enhanced photocatalytic performance under visible light
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 382, Issue 2, 15 July 2010, Pages 190–196
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