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Crystalline and narrow band gap semiconductor BaZrO3: Bi–Si synthesized by microwave–hydrothermal synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
53921 46989 2015 7 PDF Available
Title
Crystalline and narrow band gap semiconductor BaZrO3: Bi–Si synthesized by microwave–hydrothermal synthesis
Abstract

•Cubic perovskyte phase without second phase segregation up to 30 mol% bismuth substitution.•Nanometer sphere-like nanoparticles.•Microwave-hydrothermal synthesis parameters 2 h at 170 °C.

Necessity-oriented materials design has become a priority for every nation conscious of the well-being of the environment. A suitable environmentally friendly microwave-hydrothermal reaction was used to synthesize BaZrO3. A study of the properties of pure Si doped, and Bi–Si co-doped BaZrO3 semiconductors is presented. Crystalline structure, morphology and optical properties were dependent on the concentration of bismuth. Well faceted and spherical particles with increasing sizes from 90 up to 500 nm were obtained as the bismuth concentration increased. The highly crystalline compounds produced, maintain the BaZrO3 cubic perovskite phase even at bismuth–silicon concentrations as high as 50 and 1.5 mol%, respectively. The optical absorption edge shifts into the visible-light region and the band gap narrows as the bismuth concentration increases. Suitable compounds were obtained at reaction times of 1 and 4 h at 170 °C in water–ethanol solvent for non-doped BaZrO3 and doped BaZrO3, respectively. Since similar properties of other semiconductor materials have practical application as visible light-active photocatalysts, we propose the potential use of nanocomposite BaZrO3 as a green photocatalyst. The effects of bismuth–silicon inclusions on the properties of BaZrO3 and its relation with photocatalytic properties are exposed. HREM, HAADF and dopant distributions inside the perovskite structure are presented.

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Keywords
Photocatalyst; Nanomaterial; BaZrO3; Microwave synthesis
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Crystalline and narrow band gap semiconductor BaZrO3: Bi–Si synthesized by microwave–hydrothermal synthesis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 250, 15 July 2015, Pages 95–101
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