Preparation and Characterization of Buoyant Nitrogen-doped TiO2 Composites Supported by Fly Ash Cenospheres for Photocatalytic Applications

doi:10.1016/j.jmst.2013.04.027

J. Mater. Sci. Technol.

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Preparation and Characterization of Buoyant Nitrogen-doped TiO₂ Composites Supported by Fly Ash Cenospheres for Photocatalytic Applications

Chuang Li, Bing Wang, Hao Cui, Jianping Zhai, Qin Li

State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Nanjing 210046, China

Received:2012-09-10 Revised:2012-10-08 Online:2013-09-30 Published:2013-08-22
Contact: Qin Li
Supported by:
National Natural Science Foundation of China (No. 51008154), the Jiangsu Natural Science Foundation (No. SBK201022682), the Research Fund for the Doctoral Program of Higher Education of China (No. 20090091120007), the Fundamental Research Funds for the Central University (No.1112021101), the Jiangsu Cultivate the Innovative Engineering for Graduate Student (No. CXZZ12_0063), the China Postdoctoral Science Foundation funded project (No. 2012M511254), as well as the Scientific Research Foundation of Graduate School of Nanjing University (No. 2012CL10).

Abstract

Abstract:

Fly ash cenospheres (FACs) coated with nitrogen-doped TiO₂ (N-TiO₂) composites were prepared by the sol–gel method for use as photocatalysts. The photocatalytic activity and kinetics of the composites produced at different calcination temperatures and with different nitrogen doping contents were studied under visible light irradiation by monitoring the environmental degradation of methylene blue (MB). The MB degradation ratio of N-TiO₂/FAC (25%, 450 °C) was 10% higher than that of N-TiO₂ and 40% higher than that of TiO₂/FAC. These N-TiO₂/FAC composites floated in water and could be recovered after the photocatalytic reaction by phase separation.

Key words: Nitrogen, Photocatalyst, Solegel coreeshell particle, Composite

Chuang Li, Bing Wang, Hao Cui, Jianping Zhai, Qin Li. Preparation and Characterization of Buoyant Nitrogen-doped TiO₂ Composites Supported by Fly Ash Cenospheres for Photocatalytic Applications[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.04.027.

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Preparation and Characterization of Buoyant Nitrogen-doped TiO₂ Composites Supported by Fly Ash Cenospheres for Photocatalytic Applications

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