不同比表面积铜锌锡硫纳米结构的合成及其光催化性能研究

Synthesis and photocatalytic activity of Cu_2ZnSnS_4 hierarchical nanostructures with different surface areas

通过简单的溶剂热法合成了具有不同比表面积的铜锌锡硫(CZTS)花状纳米结构.采用X射线粉末衍射、扫描电子显微镜、紫外可见分光光度计对纳米结构进行了表征.通过控制合成条件,成功制备出比表面积分别为115.3 m2/g和63.4 m2/g的CZTS花状纳米结构.研究了CZTS花状纳米结构对有机染料分子亚甲基蓝的可见光催化性能,经过7小时的可见光催化降解,比表面积为115.3 m2/g和63.4 m2/g CZTS花状纳米结构对亚甲基蓝的降解率分别为78.6%和58.8%.结果表明,CZTS花状纳米结构的比表面积对其可见光催化性能有显著影响.

Cu2ZnSnS4 （CZTS） hierarchical nanostructures with different surface areas were synthesized via a facile solvothermal method in large quantity. The morphology, size, structure, composition and optical properties of the as-obtained CZTS were characterized by XRD, SEM and Uv-vis spectra. The CZTS nanostructures with surface areas of 115.3 m2/g and 63.4 m2/g were obtained by controlling the experimental conditions. The visible light photocatalytic activity of the as-synthesized CZTS was investigated by degradation of methylene blue （MB）. The results indicate that the as-prepared CZTS hierarchical nanostructures with surface areas of 115.3 m2/g and 63.4 m2/g exhibit photocatalytic activity with 78.6% and 58.8% degradation of MB after 7 h reaction under visible light irradiation. The results demonstrate that the surface area of CZTS nanostructures with flower-like morphology has a great effect on their visible light photocatalystic activity.