期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 3, 页码 1608-1615出版社
AMER CHEMICAL SOC
DOI: 10.1021/am404457u
关键词
TiO2; nanocrystals with internal pores; photocatalytic
资金
- National Natural Science Foundation of China [21273169, 51032005]
- Research and Development Project of Hubei Province [2013BAA045]
- National Basic Research Program of China [2009CB939704]
Anatase TiO2 nanocrystals with internal pores are prepared by a novel facile microwave-assisted hydrolysis of a mixture of TiOCl2 and HF aqueous solutions, followed by calcination at 400 degrees C. The TiO2 nanocrystals with internal pores are characterized by XRD, TEM, SEM, BET, EDS, and XPS. The formation mechanism of the TiO2 nanocrystals with internal pores is discussed by investigating the role of fluorine and the calcination. The photocatalytic measurement shows that the TiO2 nanocrystals with internal pores exhibit much higher photocatalytic activity for the photodegradation of crystal violet, methyl orange, and 4-chlorophenol than the TiO2 solid nanocrystals. The photocatalytic enhancement is due to the fluorination of TiO2 nanocrystals as well as its unique hollow nanostructure, which results in the higher separation efficiency of photogenerated electrons and holes in the TiO2 nanocrystals with internal pores than in its solid counterpart.
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