Photocatalytic performance of combustion-synthesized β and γ-Ga2O3 in the degradation of 1,4-dioxane in aqueous solution

Photocatalytic performance of combustion-synthesized β and γ-Ga2O3 in the degradation of... Nanostructures of β and γ-Ga2O3 were prepared by the solution combustion route using urea as fuel. The synthesized nano photocatalysts were characterized by use of XRD, FT-IR, BET, TEM, TGA–DTA, DRS, and Raman spectroscopy. XRD and TEM investigations confirmed the nanostructures; particle size was in the range 3–5 nm for γ-Ga2O3 and 40–50 nm for β-Ga2O3. The specific surface area of γ-Ga2O3 was 91 m2 g−1 and that of β-Ga2O3 was 24.3 m2 g−1. The polymorphs of gallium oxide were used as photocatalysts for decomposition of 1,000 mg/l 1,4-dioxane. More than 90 % of the 1,4-dioxane could be degraded in less than 180 min by use of 10 mg/l photocatalyst + 0.5 ml H2O2. The efficiency of photocatalytic degradation of 1,4-dioxane by the synthesized photocatalysts was compared with that of P-25 TiO2 and followed the order γ-Ga2O3 ≥ β-Ga2O3 > P-25 TiO2. The degradation was found to follow pseudo first-order kinetics. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Photocatalytic performance of combustion-synthesized β and γ-Ga2O3 in the degradation of 1,4-dioxane in aqueous solution

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Publisher
Springer Netherlands
Copyright
Copyright © 2012 by Springer Science+Business Media B.V.
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0610-1
Publisher site
See Article on Publisher Site

Abstract

Nanostructures of β and γ-Ga2O3 were prepared by the solution combustion route using urea as fuel. The synthesized nano photocatalysts were characterized by use of XRD, FT-IR, BET, TEM, TGA–DTA, DRS, and Raman spectroscopy. XRD and TEM investigations confirmed the nanostructures; particle size was in the range 3–5 nm for γ-Ga2O3 and 40–50 nm for β-Ga2O3. The specific surface area of γ-Ga2O3 was 91 m2 g−1 and that of β-Ga2O3 was 24.3 m2 g−1. The polymorphs of gallium oxide were used as photocatalysts for decomposition of 1,000 mg/l 1,4-dioxane. More than 90 % of the 1,4-dioxane could be degraded in less than 180 min by use of 10 mg/l photocatalyst + 0.5 ml H2O2. The efficiency of photocatalytic degradation of 1,4-dioxane by the synthesized photocatalysts was compared with that of P-25 TiO2 and followed the order γ-Ga2O3 ≥ β-Ga2O3 > P-25 TiO2. The degradation was found to follow pseudo first-order kinetics.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jun 19, 2012

References

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