碳酸锶复合物的可见光催化性能研究

Research on the visible light photocatalytic performance of strontium carbonate composite

以SrCl_2为原料,通过沉淀法制得Sr(OH)_2,后经高温煅烧得到SrCO_3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Sr CO3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SrCO_3复合物对亚甲基蓝的降解率分别为98.7%,96.3%,96.0%和95.2%。

SrCO_3 composite photocatalyst was prepared in air by calcinations of Sr(OH)_2,which was synthesized via a method of precipitation by SrCl_2. 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 composition were analyszed by Xray photoelectron spectroscopy(XPS) and the samples' light absorption and fluorescence properties were characterized by UV-vis diffuse reflection absorption spectrum and photoluminescence spectra(PL). The photocatalytic property of SrCO_3 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 SrCO_3 composite photocatalyst,which was calcined under 500,600,700 and 800 ℃,reached 98.7%,96.3%,96.0% and 95.2% respectively.