CHEN Xin, DONG Weixia, GU Xing-yong, LUO Ting

(School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: 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.

Key words: hydrothermal method; CaTiO₃; band gap width; photocatalytic properties