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为了开发具有可见光响应的高活性光解水制氢催化剂,采用水热合成法制备了CdxMn1–xS固溶体光催化剂,通过X射线衍射、紫外–可见吸收光谱测试手段对所制备催化剂进行了表征。结果表明:CdxMn1–xS固溶体具有和CdS相似的结构,即六方相纤维锌矿结构,并且CdxMn1–xS固溶体在可见光下有很强的吸收,Cd0.34Mn0.66S,Cd0.48Mn0.52S及Cd0.68Mn0.32S的禁带宽度分别为2.17、2.25和2.32 eV。光催化分解水制氢实验表明:催化剂制氢活性由大到小的顺序排列为:Cd0.48Mn0.52S,Cd0.34Mn0.66S,Cd0.68Mn0.32S,CdS,MnS。Cd0.48Mn0.52S产氢速率可达273.3μmol/h。
CdxMn1-xS solid solution photocatalysts were prepared by hydrothermal synthesis. The catalysts prepared by X-ray diffraction and UV-Vis absorption spectroscopy were characterized for the purpose of developing highly active photolysis water catalysts with visible light response. The results show that CdxMn1-xS solid solution has a similar structure to CdS, namely hexagonal wurtzite structure, and CdxMn1-xS solid solution has strong absorption in the visible light, Cd0.34Mn0.66S, Cd0.48Mn0.52S and Cd0. The band gap of 68Mn0.32S is 2.17, 2.25 and 2.32 eV, respectively. Hydrogen photocatalytic decomposition of water experiments show that: the hydrogen activity of the catalyst arranged in descending order: Cd0.48Mn0.52S, Cd0.34Mn0.66S, Cd0.68Mn0.32S, CdS, MnS. The hydrogen production rate of Cd0.48Mn0.52S can reach 273.3μmol / h.