中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 25 No. 7 July 2015 |
（1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. College of Materials Science and Engineering, Hunan University, Changsha 410082, China）
Abstract:Perovskite ZnTiO3 was prepared through a new method which contained a hydrothermal process for the preparation of titanate nanotubes and an ion-exchange process. The titanate nanotubes were inferred to be H2Ti3O7·3H2O. X-ray diffraction (XRD) result revealed the presence of cubic perovskite phase of ZnTiO3. The unique chain-like morphology of ZnTiO3 was observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). UV-Vis diffusive reflection spectra of ZnTiO3 indicated that the absorbance obviously increased in the visible light region. The degradation rate of methyl orange solution (15 mg/L) reached 95.3% over ZnTiO3 (0.3 g/L) after 20 min xenon light irradiation, which was higher than that using the commercial catalyst P25 under the same reaction condition. The degradation kinetic results follow the first-order equation and the rate constant is 0.1020.
Key words: ZnTiO3; ion-exchange; photocatalysis; perovskite; synthesis; characterization
