中文摘要：

采用先水热处理法制得钛酸盐纳米管再进行离子交换的两步工艺合成钙钛矿型ZnTiO3。钛酸盐纳米管成分为H2Ti3O7·3H2O。XRD测试结果表明,ZnTiO3具有立方相钙钛矿结构。SEM和TEM观察到ZnTiO3具有独特的串珠状微观形貌结构。紫外-可见漫反射光谱表明,ZnTiO3在可见光区吸收率明显增强。当溶液中ZnTiO3质量浓度为0.3g/L时,在氙灯下照射20min,浓度为15mg/L的甲基橙溶液降解率达95.3%,所得ZnTiO3显示出比相同反应条件下标准催化剂P25更高的催化活性。甲基橙的降解动力学符合一级动力学方程,降解反应的速率常数为0.1020。

英文摘要：

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 ZnTiO3indicated 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.