以SrCl2为原料,通过沉淀法制得Sr(OH)2,后经高温煅烧得到SrCO3复合物光催化剂.采用 X射线衍射(XRD)、傅里叶红外光谱(FT-IR)分析产物的物相和结构,通过光电子能谱(XPS)对材料表面结构和成分进行分析,利用紫外-可见漫反射吸收光谱(UV-Vis)和光致发光谱(PL)表征样品的光吸收和荧光性质.以亚甲基蓝为目标物,在可见光下考察了SrCO3复合物的光催化性能.结果表明,在可见光照射150 min后,在500,600,700和800℃下煅烧得到的SrCO3复合物对亚甲基蓝的降解率分别为98．7％,96．3％,96．0％和95．2％.
SrCO3 composite photocatalyst was prepared in air by calcinations of Sr(OH)2 ,which was synthesized via a method of precipitation by SrCl2 .The phases and structures of the products were investigated by powder X-ray diffraction (XRD)and Fourier transform infrared spectroscopy(FT-IR),surface structure and composi-tion were analyszed by X-ray photoelectron spectroscopy (XPS)and the samples’light absorption and fluores-cence properties were characterized by UV-vis diffuse reflection absorption spectrum and photoluminescence spectra (PL).The photocatalytic property of SrCO3 composite photocatalysts was evaluated by photocatalytic oxidation of methylene blue (MB)under visible-light irradiation.Results showed that with the irradiation time of 150 min,the photodegradation efficiency of MB by the SrCO3 composite photocatalyst,which was calcined under 500,600,700 and 800 ℃,reached 98.7%,96.3%,96.0% and 95.2% respectively.
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