文献类型：期刊文献

英文题名：Porous TiO₂ hollow nanospheres: synthesis, characterization and enhanced photocatalytic properties

作者：Zhang, Haijiao[2];Du, Guidong[2];Lu, Wenqi[3];Cheng, Lingli[2];Zhu, Xuedong[1];Jiao, Zheng[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Sch Environm & Chem Engn, Inst Nanochem & Nanobiol, Shanghai 200444, Peoples R China;[3]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China

年份：2012

卷号：14

期号：10

起止页码：3793

外文期刊名：CRYSTENGCOMM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000303168700062)】；

基金：The work was supported by the Natural Science Foundation of China (61174011), Science and Technology Commission of Shanghai Municipality (10DZ0500100, 11DZ2272100), Specialized Research Fund for the Doctoral Program of Higher Education (20103108120021), Innovation Program of Shanghai Municipal Education Commission (12YZ013), Shanghai Leading Academic Disciplines (S30109), Research Funding of State Key Laboratory of Chemical Engineering (ECUST), and State Key Laboratory of Molecular Engineering of Polymers (Fudan University).

语种：英文

摘要：A facile solvothermal process combined with a precursor thermal transformation method has been developed for preparing porous TiO2 hollow nanospheres with a high surface area and a good thermal stability. The porous TiO2 hollow spheres were obtained by using TiOSO4 as a titanium source and carbon nanospheres as a sacrificial template. Their particle size, diameter and morphology can be readily controlled by varying growth parameters, including reaction temperature, time and reagent concentration. The calcination temperature of TiO2-C core-shell nanospheres was found to have a profound effect on the structure and properties of the final products. The photocatalytic activities of the products were evaluated by the photodegradation of methyl orange (MO). The TiO2 hollow spheres obtained from 450 degrees C thermal treatment exhibited higher photocatalytic activity than commercial Degussa P25 in the presence of Cr(VI). The possible photodegradation mechanism was also investigated.