负载型纳米CdS制备及催化分解水制氢的研究进展

Progress in Research of Preparation of Loaded Nano-CdS and H_2 Production by Photocatalytic Decomposition of Water

硫化镉(CdS)是一种研究广泛的光催化剂,禁带能为2.4 eV,可以吸收波长小于520 nm的紫外和可见光,吸收波长范围宽,作为光催化剂具有较大的优势.纯CdS的光催化效率较低,在水溶液中易发生光腐蚀,致使催化寿命缩短,限制了CdS的应用.利用载体比表面积大,易于离子交换且有利于电子传递等优点,将纳米CdS制备成负载型催化剂,可以有效地提高CdS的光催化效率与稳定性,成为CdS改性的一种有效手段.本文综述了以SiO2、Al2O3、MgO、分子筛、高分子材料、层状化合物及钙钛矿型复合氧化物等为载体,制备负载型纳米CdS光催化剂的方法及其在光催化分解水制氢中的应用.

Cadmium sulfide （CdS）, which is a kind of visible-light-response semiconductor catalyst with the band gap energy of 2.4 eV, is paid extensive attention in the field of photocatalytic reaction. The pure CdS is of low photocatalytic efficiency and easily photocorroded to lead to decrease its photocatalytic activity, which limit its application in the aqueous solution. It has been improved media for catalytic activity ＆ stability of CdS semiconductor catalyst to load nano-CdS on the carriers with large specific surface area ＆ easy exchange which prevent charger recombination. In this paper, preparation of nano-CdS loaded on SiO2, Al2O3, MgO, zeolite, macromolecular materials ＆ layered oxides and their applications in He production of photocatalytic decomposition of water are summarized,