n型半导体CdS催化剂的合成及其光催化性能研究

Synthesis and Photocatalytic Properties of n-type Semiconductor CdS Catalysts

硫化镉半导体具有合适的能带位置,强可见光吸收,可作为光催化反应中的催化剂,以氯化铬、铜试剂为原料,进一步与乙二胺采用水热法合成.光照条件下(λ>420 nm),产氢性能为57.38μmol·g^(-1) h^(-1),并通过循环实验测试表现出优异的稳定性.对硫化镉催化剂测试了其XRD、SEM、XPS、固体紫外以及BET表征,实验结果显示,硫化镉的结构为六方晶体结构,其形貌为分布均匀的一维纳米结构,禁带宽度为2.28 eV,比表面积与孔隙率大.因此,硫化镉可应用于光催化产氢实验.

Cadmium sulfide semiconductor has appropriate energy band position and strong visible light absorption.It can be used as a catalyst in photocatalytic reaction.It was further synthesized with ethylenediamine by hydrothermal method with chromium chloride and copper reagent as raw materials.Under light conditions(λ>420 nm),the hydrogen production performance was 57.38μmol·g^(-1) h^(-1) and showed excellent stability through cyclic experiment.The cadmium sulfide catalyst was characterized by XRD,SEM,XPS,UV-vis and BET.The experimental results showed that the structure of cadmium sulfide was hexagonal crystal structure,the morphology was one-dimensional nanostructure with uniform distribution,the band gap was 2.28 eV,and the specific surface area and porosity were large.Therefore,cadmium sulfide can be used in photocatalytic hydrogen production experiment.