硫化镉制备及光催化分解水制氢综合实验设计

设计了硫化镉制备及光催化分解水制氢综合实验,该实验涉及催化剂的制备、表征以及光催化性能测试等方面。通过该实验,使学生了解物理化学学科前沿知识,提高学生综合实验能力,培养学生创新能力与科学素养。以典型光催化剂CdS为例,分别以水和乙醇为溶剂,采用化学沉淀法制备CdS。利用X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见漫反射(UV-Vis DRS)等手段对CdS进行表征。通过光催化分解水制氢实验,比较采用不同溶剂制备的CdS的光催化性能。结果表明,以乙醇为溶剂合成的CdS光催化性能最佳,产氢效率是以水为溶剂合成CdS的10.97倍。

Design on comprehensive experiment for preparation of CdS and photocatalyst for hydrogen production from water

The comprehensive experiment for preparation of CdS and photocatalyst for hydrogen production from water is designed,involving preparation,characterization of catalysts and performance.Through this experiment,students can understand the frontier knowledge of physical chemistry,improve their comprehensive experimental ability,and cultivate their innovative ability and scientific accomplishment.By taking typical CdS photocatalyst as an example,CdS is prepared by chemical precipitation method with water and ethanol as solvent respectively.CdS is characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),UV-visible diffuse reflection spectrum(UV-Vis DRS),etc.The photocatalytic properties of the prepared CdS with different solvents are compared through the experiment of photocatalytic decomposition of water to hydrogen production.The results have shown that CdS synthesized with ethanol as solvent has the best photocatalytic performance and the hydrogen production efficiency is 10.97 times higher than that of CdS synthesized with water as solvent.