制备了氮掺杂石墨氮化碳(N-g-C₃N₄)负载Cd_0.5Zn_0.5S固溶体复合材料,并以此为基础复合另一种优秀的半导体催化剂In₂O₃制得In₂O₃/Cd_0.5Zn_0.5S/N-g-C₃N₄催化剂,通过三者的复合界面加速电子的传输和阻碍电子-空穴对的复合以提升光催化性能。通过扫描电子显微镜、透射电子显微镜、X射线光电子能谱和X射线衍射对所制备的催化剂微观形貌和结构进行表征,利用电化学工作站进行瞬态光电流测试和气相色谱仪对产氢性能进行测试。结果表明,采用两步水热法制备得到较好分散的In₂O₃/Cd_0.5Zn_0.5S/N-g-C₃N₄复合催化剂;在In₂O₃和Cd_0.5Zn_0.5S/N-g-C₃N₄质量比为4∶10时具有最好的催化效果,产氢量为100.22 μmol,产氢速率为21.760 μmol/h,说明In₂O₃/Cd_0.5Zn_0.5S/N-g-C₃N₄复合光催化剂有较好电荷载体的快速迁移能力及稳定性。

A nitrogen-doped graphite carbon nitride (N-g-C₃N₄) supported Cd_0.5Zn_0.5S solid solution composite heterostructure is prepared,and is used to composite In₂O₃,another excellent semiconductor catalyst,to prepare In₂O₃/Cd_0.5Zn_0.5S/N-g-C₃N₄ catalyst.The catalytic performance is improved by accelerating electron transport and hindering the recombination of electron-hole pairs through the composite interface of the three substances.By means of scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy and X-ray diffraction,the microscopic morphology and structure of the prepared catalyst are characterized,and the transient photocurrent test and gas chromatography are employed to test the hydrogen production performance by electrochemical workstation.It is verified that a well-dispersed indium oxide/cadmium zinc sulfur group/nitrogen-doped graphite carbon nitride (In₂O₃/Cd_0.5Zn_0.5S/N-g-C₃N₄) composite catalyst is prepared by two-step hydrothermal method.The catalyst exhibits the best catalytic effect when the mass ratio of In₂O₃ to Cd_0.5Zn_0.5S/N-g-C₃N₄ is 4∶10,over which the hydrogen production rate is 100.22 μmol,and the hydrogen production rate is 21.760 μmol·h^-1,indicating that In₂O₃/Cd_0.5Zn_0.5S/N-g-C₃N₄ composite photocatalyst has a good rapid migration ability of charge support and a good stability.

张小伏(1994-),男,硕士研究生,研究方向为光催化,2829153556@qq.com。