Guo Yaxin, Wei Jie, Liu Yalong, Yang Tiantian, Xu Zhuo
Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education & International Center for Dielectric Research, Xi'an Jiaotong University, 710049, Xi'an, People's Republic of China.
Nanoscale Res Lett. 2017 Dec;12(1):181. doi: 10.1186/s11671-017-1868-4. Epub 2017 Mar 9.
CuZnSnS (CZTS) hierarchical microstructures were synthesized by using a facile and nontoxic hydrothermal route, which were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), Raman spectra, and UV-Vis absorption spectra. The results and analysis show that surfactants used in the hydrothermal process have significant effect on the phase structures, morphologies, and photocatalytic activities of CZTS powders. Especially, the well-crystallized and pure kesterite CZTS hierarchical microstructures were synthesized with the addition of high-concentration tartaric acid (TA) in the hydrothermal process. A nucleation-dissolution-recrystallization mechanism was discussed, and the photocatalytic activities of CZTS hierarchical microstructures for the degradation of rhodamine B (RhB) were also evaluated. We argue that the crystalline structure and particle morphology have played key roles on the photocatalytic properties of CZTS crystals. A considerably high photocatalytic efficiency of 51.66% after 4 h irradiation was obtained in pure kesterite CZTS hierarchical microstructures, which suggests that CZTS would be a promising candidate of photocatalyst.
采用简便无毒的水热法合成了CuZnSnS（CZTS）分级微结构，并用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、拉曼光谱和紫外-可见吸收光谱对其进行了表征。结果与分析表明，水热过程中使用的表面活性剂对CZTS粉末的相结构、形貌和光催化活性有显著影响。特别是，在水热过程中加入高浓度酒石酸（TA）合成了结晶良好的纯硫锡铜矿CZTS分级微结构。讨论了成核-溶解-再结晶机理，并评估了CZTS分级微结构对罗丹明B（RhB）降解的光催化活性。我们认为晶体结构和颗粒形态对CZTS晶体的光催化性能起关键作用。在纯硫锡铜矿CZTS分级微结构中，光照4小时后获得了相当高的51.66%的光催化效率，这表明CZTS将是一种很有前途的光催化剂候选材料。
