CdS/CuS复合材料的合成、生长机理及光催化析氢 水热法
Synthesis, growth mechanism and photocatalytic H evolution of CdS/CuS composite hydrothermal method.
作者信息
Yang Xiande, Lu Guangwen, Wang Boyou, Wang Tinglan, Wang Yongqian
机构信息
Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences 388 Lumo Road Wuhan 430074 P. R. China
College of Chemistry and Material Science, Nanning Normal University Nanning 530001 P. R. China.
出版信息
RSC Adv. 2019 Aug 13;9(43):25142-25150. doi: 10.1039/c9ra04336e. eCollection 2019 Aug 8.
In recent years, visible light-driven photocatalysts used for confronting energy shortages and environmental pollution have drawn much attention. CdS is regarded as an excellent photoelectric semiconductor for photocatalysis, but photocorrosion and low photocatalytic activity limit its practical application. In order to improve the photocatalytic performance of CdS, we synthesized a II-type CdS/CuS composite a hydrothermal method in one step. CdS, CuS and the CdS/CuS composite have flower-like structures according to FESEM results. XRD and EDS results confirm that the composite is composed of CdS and CuS, indicating that we have successfully synthesized the CdS/CuS composite. UV-Vis and PL results show that the formation of heterojunction structures with CuS can be used to control the optical properties of CdS. H evolution results show that the CdS/CuS composite generates H at a rate of 295 μmol g h, which is higher than that of CdS.
近年来，用于应对能源短缺和环境污染的可见光驱动光催化剂备受关注。硫化镉（CdS）被视为一种用于光催化的优异光电半导体，但光腐蚀和低光催化活性限制了其实际应用。为了提高CdS的光催化性能，我们采用水热法一步合成了II型CdS/CuS复合材料。场发射扫描电子显微镜（FESEM）结果表明，CdS、CuS和CdS/CuS复合材料均具有花状结构。X射线衍射（XRD）和能谱分析（EDS）结果证实该复合材料由CdS和CuS组成，表明我们已成功合成CdS/CuS复合材料。紫外可见光谱（UV-Vis）和光致发光（PL）结果表明，与CuS形成的异质结结构可用于调控CdS的光学性质。析氢结果表明，CdS/CuS复合材料产氢速率为295 μmol g⁻¹ h⁻¹，高于CdS。
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