中文摘要：

以钛酸正丁酯和无水氯化钙为原料,采用水热法制备了不同光催化特性的CaTiO3粉体。利用X射线衍射仪（XRD）和扫描电子显微镜（SEM）对样品的相结构和微观形貌进行了分析,并结合样品的紫外-可见吸收分光光谱吸收曲线表征了材料的吸收特性及带隙宽度。研究了添加不同含量的NaOH对CaTiO3物相结构、微观形貌、带隙宽度和光催化特性的影响。结果表明：NaOH的添加量从0.0315 mol至0.0615 mol时均可获得纯的CaTiO3正交相,粉体外观形貌历经了交错重叠块状到相互分离的方块柱状的转变。对其光学性能和光催化性能显示,NaOH添加量为0.0465 mol的CaTiO3粉体具有最小的带隙宽度,在紫外可见光3 h下对罗丹明B的光催化效率达到了42.7%。

英文摘要：

CaTiO3 powders with the different photocatalytic properties were prepared by hydrothermal method using TBOT and CaCl2 as starting materials. The phase, morphologies, and optical absorption properties of as-prepared samples were characterized by X-Ray Diffraction （XRD）, Field Emission Scanning Electron Microscope （FESEM） and UV-Vis absorption spectra （UV-Vis）. The phase, structure, band gap width and photocatalytic properties of CaTiO3 were studied by adding different NaOH contents. The results showed that CaTiO3 had an orthogonality phase structure and its morphologies changed from staggered overlapping bulk to the separated prisms, when NaOH varied from 0.0315 mol to 0.0615 mol. CaTiO3 power had a lowest band gap width when NaOH content was 0.0465 mol, and the photocatalytic rate degraded for rhodamine B reached 42.7% at the ultraviolet visible for 3 h.