期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 3, 页码 1623-1631出版社
AMER CHEMICAL SOC
DOI: 10.1021/am404484k
关键词
TiO2; mesoporous structure; film; photocatalyzed destruction
资金
- National Outstanding Young Investigator Grant of China [51225402]
- National Natural Science Foundation of China (NSFC) [51071005, 51002004]
- Beijing Municipal Commission of Education Foundation [KZ201010005001, KM201110005003]
- Beijing Innovation Talent Project
Ordered mesostructured TiO2 thin films were constructed through a method that combined sol-gel with evaporation-induced self-assembly (EISA). It was found that the calcination temperature, as well as the type of block copolymer, could vary the TiO2 mesoporous structure. Based on tension stress calculated by the surface energy of crystallites and the compression calculated by interface energy between the crystallites, the thermodynamic study for the sample had been carried out and the critical crystallite size expression of the mesoporous film was presented for the prediction of the thermal stability of the mesoporous structure at high temperature. It was also found that varying the mass ratio of templating agent to inorganic precursor could adjust the pore size of mesoporous TiO2. The pore size regulating mechanism had been discussed. The sample calcined at 450-500 degrees C, which had a higher specific surface area and larger pore size, exhibited higher photocatalyzed destruction capability of Methylene Blue.
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