Open Access Influence of Mo() Concentration in Precursors on Preparation and Photocatalytic Activity of h-MoO3 Crystallites

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Abstract:

The hexagonal h-MoO3 crystallines were synthesized by a hydrothermal method using analytical grade reagents ammonium molybdate ((NH4)6Mo7O244H2O) and nitric acid (HNO3) as raw materials. The phase and morphology of the samples prepared in ammonium molybdate solution with different Mo() concentrations were characterized by X-ray diffraction and scanning electron microscopy, respectively. The photocatalytic property of the h-MoO3 samples prepared at different Mo() concentrations was evaluated by using methylene blue dye as target degradation products. The results show that in the Mo() concentration range from 0.04 mol/L to 0.6 mol/L, the pure and hexagonal rod structured h-MoO3 microcrystalline is obtained without any template agent. The size of the rod increases with the increase of Mo() concentration. It is indicated that after the visible light irradiation, the samples prepared at Mo() concentration of 0.07 mol/L and the irradiation time of 100 min have the superior photocatalytic performance for the degradation of methylene blue, and the degradation rate reaches 99.7%.

Keywords: hexavalent molybdenum ion concentration; hydrothermal method; molybdenum trioxide microcrystalline; photocatalytic degradation rate

Document Type: Research Article

DOI: http://dx.doi.org/10.7521/j.issn.0454–5648.2013.06.27

Affiliations: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi′an 710021, China

Publication date: June 1, 2013

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  • Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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