fulltext.study @t Gmail

The development of highly crystalline single-phase Bi20TiO32 nanoparticles for light driven oxygen evolution

Paper ID Volume ID Publish Year Pages File Format Full-Text
45941 46427 2014 7 PDF Available
Title
The development of highly crystalline single-phase Bi20TiO32 nanoparticles for light driven oxygen evolution
Abstract

•Visible light responsive and pure phase Bi20TiO32 has been successfully synthesized.•Chelating agent and precursors have an effect on the material properties.•The grain size of Bi20TiO32 depends on the ratio of citric acid to metal ions.•Photocatalytic activity of Bi20TiO32 for O2 evolution can be enhanced by co-catalysts.•The as-prepared Bi20TiO32 sample shows excellent stability during oxygen evolution.

The oxygen-producing photocatalysts play a critical role in the development of the artificial Z-scheme photocatalysis. Bismuth titanates have various complex forms, among which Bi20TiO32 could be an ideal oxygen evolution photocatalyst, but one has been suffering from its metastable structure and the complicate preparation. Herein, pure phase Bi20TiO32 samples were successfully synthesized by a simple sol–gel method followed by calcination of precursors. The effects of chelating agent, source of Bi and Ti precursor's composition have been studied. By combining bismuth nitrate, titanium isopropoxide, and citric acid, highly crystalline Bi20TiO32 was obtained after calcination since citric acid helps the formation of a stable complex in the sol–gel preparation with slow hydrolysis reactions due to highly steric hindrance in titanium isopropoxide. The effect of citric acid to metal ion ratio in this synthesis has been studied and optimized. It was found that only calcinations at 375 °C produced a pure phase while others did not. Here we first reported that pure Bi20TiO32 with high crystallinity was obtained with 1:1 ratio of citric acid to metal ions and it showed the highest photocatalytic activity of oxygen evolution under the illumination. The effects of grain size and co-catalyst on Bi20TiO32 photocatalytic activity of the as-prepared samples have been studied. More generally, it suggests the incorporation of bismuth into a simple oxide of wide band gap via the simple sol–gel method as a strategy to design photocatalysts with excellent properties.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Bismuth titanates; Photocatalytic activity; Sol–gel; Oxygen production; Single phase
First Page Preview
The development of highly crystalline single-phase Bi20TiO32 nanoparticles for light driven oxygen evolution
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 150–151, 5 May 2014, Pages 363–369
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