Citation: ZHONG Yong-Hui, ZHOU Qi, LIU Jia-Qin, WANG Yan, CHEN Xing, WU Yu-Cheng. Preparation of Fluorizated TiO₂ Hollow Microspheres and Their Photocatalytic Activity[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(10): 2133-2139. doi: 10.3969/j.issn.1001-4861.2013.00.238 shu

Preparation of Fluorizated TiO₂ Hollow Microspheres and Their Photocatalytic Activity

ZHONG Yong-Hui ^1,2 ,
ZHOU Qi ¹ ,
LIU Jia-Qin ^1,2 ,
WANG Yan ^1,2 ,
CHEN Xing ³ ,
WU Yu-Cheng ^1,2

1.
1 School of Materials Science and Engieering, Hefei University of Technology, Hefei 230009, China;

Received Date: 27 February 2013
Available Online: 9 April 2013
Fund Project: 国家自然科学基金(No.51202052,No.91023030) (No.51202052,No.91023030)安徽省国际科技合作计划(No.10080703017)资助项目 (No.10080703017)

Using tetrabutyl orthotitanate as Ti source, hydrofluoric acid as Fsource and ethanol as solvent, well crystallized anatase-phase F-modified TiO₂ hollow microspheres have been synthesized via a solvothermal process. The structure and properties of the resulting samples were characterized by XRD, SEM, FTIR, XPS. The results indicated that the fluorizated TiO₂ hollow microspheres had an anatase phase, the fluorine atoms were mainly distributed on the surface of TiO₂, and existed in forms of chemical-adsorption. Hollow anatase TiO₂ microspheres were achieved by Ostwald ripening under solvothermal conditions. Compared to pure titania, the fluorizated TiO₂ hollow microspheres showed a much higher degradation efficiency, and degradation rate of which can be up to 98% during the photodegradation of methyl orange with the initial concentration of 20 mg·L^-1 for 30 minutes. The mechanism for the great improvement for photocatalytic activity can be attributed to the unique structure of hollow microsphere and the fluorine modification, because the strong electron withdrawing ability of the surface ≡Ti-Fgroups reduces the recombination of photogenerated electrons and holes, and enhances the formation of free OHradicals.
- titanium dioxide; fluorine-modification; hollow microspheres; photocatalysis
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Preparation of Fluorizated TiO2 Hollow Microspheres and Their Photocatalytic Activity

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Preparation of Fluorizated TiO₂ Hollow Microspheres and Their Photocatalytic Activity