Investigation of structural and textural properties of Ge x MoO3 system, promising catalyst for photocatalytic applications
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- 作者：Mohamad Kassem
- 关键词：molybdenum oxide catalysts ; germanium and molybdenum oxide composite materials ; photodegradation ; methyl red
- 刊名：Kinetics and Catalysis
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：57
- 期：1
- 页码：26-31
- 全文大小：504 KB
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1. Atomic Energy Commission of Syria, Chemistry Department, P.O. Box 6091, Damascus, Syria - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Catalysis
Physical Chemistry
Russian Library of Science - 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
- ISSN：1608-3210
文摘
The main objective of this work is to control the structural, textural and electrical properties of the system prepared by mixing molybdenum oxide with different amounts of germanium. The system is expected to be suitable as a catalyst for the photodegradation of methyl red (one of the dyes group) and the results of this study can throw some light on the relationship between the properties of this system and the extent of the dye degradation as indicated by the measurements of the photocatalytic activity. The composite materials (Ge x MoO3) were prepared by solid-state reaction between germanium and molybdenum oxide. The mixtures were made in Ge/MoO3 molar ratios of 0.01, 0.05, 0.1, 0.2, 0.5, and 1.0. The reaction was conducted in air at 700°C. The prepared samples were characterized by X-ray powder diffraction, micro-Raman spectroscopy, nitrogen adsorption measurements, diffuse reflectance spectrometry and UV-Vis absorption spectrophotometry. The addition of germanium has affected the photocatalytic activity of MoO3 as evidenced by an increase in the degradation extent of methyl red from about 14% (for pure oxide) to about 97% for Ge x MoO3 (x = 1). An enhancement in the photocatalytic activity was attributed to the change in the band gap and modification of the textural properties associated with the formation of Ge x MoO3 composites.