Synthesis of Nanocrystalline TiO2 by NH4F-Assisted Low Temperature Hydrolysis Method and its Photocatalytic Ability for Rhodamine B

Bao Wei Cao; Jian Hong Peng; Yun Hua Xu

doi:10.4028/www.scientific.net/AMR.781-784.152

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 781-784Synthesis of Nanocrystalline TiO2 by NH4F-Assisted...

Synthesis of Nanocrystalline TiO₂ by NH₄F-Assisted Low Temperature Hydrolysis Method and its Photocatalytic Ability for Rhodamine B

Abstract:

Nanocrystalline TiO₂ powders were obtained at a low temperature between 50 and 80 °C by a hydrolysis of TiCl₄ in a mixed solution of distilled water and alcohol. The as-synthesized TiO₂ powders were characterized by X-ray diffraction analysis, transmission electron microscopy, and UVvisible absorption spectroscopy. Effects of the reaction temperature and the NH₄F concentration on the formation of the nanocrystalline TiO₂ powders were investigated. Results indicate that the reaction temperature greatly affects the particle size of the as-synthesized samples, and the NH₄F concentration has a great effect on the phase structure of the as-synthesized samples. In addition, the photocatalytic activities of the as-synthesized samples for rhodamine B were also measured, and it is found that the sample synthesized from the NH₄F concentration of 30 mM exhibits a higher photocatalytic activity than the P25 powder due to a high surface area and a pure anatase phase.

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Periodical:

Advanced Materials Research (Volumes 781-784)

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152-156

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https://doi.org/10.4028/www.scientific.net/AMR.781-784.152

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Online since:

September 2013

Authors:

Bao Wei Cao, Jian Hong Peng, Yun Hua Xu

Keywords:

Chemical Process, Hydrolysis Method, Nanocrystalline, Photocatalysis

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