期刊
MATERIALS LETTERS
卷 158, 期 -, 页码 174-177出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.05.131
关键词
Solvothermal; Structural; Hierarchical TiO2; Photodegradation
资金
- National Natural Science Foundation of China [51202156]
Hierarchically structured spherical TiO2 particles were synthesized in a two-step process. Firstly, amorphous spherical TiO2 precursor particles with narrow size distribution and good dispersibility were obtained by hydrolysis from Ti(SO4)(2) using polyvinylpyrrolidone (PVP) as surfactants. The surface microstructures of the TiO2 precursors were modified in different solvothermal conditions. The results showed that lychee-like TiO2 crystals were formed using dimethylformamide (DMF) and Ethylene glycol (EG) solvents by solvothermal treatment at 180 degrees C for 2 h. When choosing cetyltrimethylammonium bromide (CTAB) as the surfactant, TiO2 crystals with an orange peel-like surface were obtained. The hierarchically spherical TiO2 showed good photodegradation rate in methylene blue (MB) solution under UV irradiation. These amorphous spherical TiO2 particles are also the precursors to form the similarly shaped perovskite titanate through A-site ion-exchange reactions. (C) 2015 Elsevier B.V. All rights reserved.
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