摘要
铜锌锡硫Cu_2ZnSnS_4(CZTS)在光解水制氢气、薄膜太阳能电池吸收层领域都有广泛的应用前景,目前该类金属硫化物的合成方法仍然存在着步骤多、反应条件苛刻等问题,因此开发低成本一步合成CZTS材料的方法具有重要的意义。本文探讨了CZTS的微波合成方法,成功一步合成了具有纳米片结构的CZTS;通过X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见吸收光谱(UV-Vis)方法分析了CZTS纳米片的物相、结构、形貌以及光吸收性能,结果表明:所得CZTS具有硫铜锡锌矿结构、为纳米薄片的结构,该材料在紫外-可见光区有着良好的吸收,带隙测定结果为1.47 e V;进一步的光电催化实验结果表明:在不添加任何共催化剂的情况下,微波法制备的CZTS催化剂在光解水制氢反应中具有良好的催化活性和催化稳定性,拓展了其在光电存储和转换器件中的应用。
Cu2ZnSnS4（CZTS） has extensive application prospect in photoelectrocatalytic water splitting and solar cells. However, the preparation methods for this material are still confronted with the problems of complex procedures and harsh reaction conditions.It is significant that the low-cost and simple preparation method should be explored. Here, one-step microwave synthesis method is introduced, and the CZTS nano-sheets are successfully fabricated through simple and convenient operation under mild reaction conditions. The structure, crystallinity, morphology and absorption spectra of the as-obtained CZTS are characterized by means of X-ray diffraction（XRD）, scanning electron microscopy（SEM）, UV-Vis absorption spectroscopy. The results reveal that as-synthesized CZTS have the structure of kesterite, and are nano-sheets, which has good absorption in visible light area, with energy band of1.47 eV. Further photoelectrocatalytic（PEC） water splitting research illustrates that the microwave prepared CZTS shows excellent activity and excellent stability for hydrogen evolution reaction without co-catalysts under simulated sunlight irradiation, which is applicable in photoelectric storage and conversion devices.
出处
《石河子大学学报（自然科学版）》
CAS
2016年第2期211-216,共6页
Journal of Shihezi University(Natural Science)
基金
新疆兵团材料化工自治区重点实验室开放课题(2015BTRC004)
石河子大学高层次人才科研启动资金专项(RCZX201206)
