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European Journal of Inorganic Chemistry
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Non‐Aqueous Preparation of High‐Crystallinity Hierarchical TiO2 Hollow Spheres with Excellent Photocatalytic Efficiency

Xujie Lü

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China, Fax: +86‐21‐5241‐6360

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Shangjun Ding

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China, Fax: +86‐21‐5241‐6360

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Yian Xie

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China, Fax: +86‐21‐5241‐6360

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Fuqiang Huang

E-mail address: huangfq@mail.sic.ac.cn

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China, Fax: +86‐21‐5241‐6360

College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China

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First published: 17 May 2011
https://doi.org/10.1002/ejic.201100151
Citations: 24
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Abstract

High‐crystallinity hierarchical anatase TiO2 hollow spheres were prepared by a high‐temperature (350 °C) and non‐aqueous solvothermal method in the absence of water, templates, or additives. The hollow structures were assembled from highly crystallized TiO2 nanoparticles and exhibit superior photocatalytic properties relative to those of Degussa P25 TiO2 under irradiation with UV light. The influence of reaction temperature on the crystallinity, morphology, crystallite shape and size, band gap, specific surface area, and pore size distribution of TiO2 has been studied in detail. It is evident that reaction temperature is the most important factor to increase the crystallinity of TiO2 in order to improve its charge transfer and transport properties, which are important in photocatalysis.