氧化锌/氧化铝光催化剂的制备及性能研究

摘要

采用大分子网络凝胶法制备了氧化锌/氧化铝光催化剂并研究了它的光催化活性.X射线粉末衍射(XRD)结果和X射线光电子谱(XPS)显示,所制备的光催化剂主要为氧化锌和氧化铝的混合相,无氢氧化物等其他杂质相存在.紫外-可见吸收光谱表明,氧化锌/氧化铝光催化剂能响应紫外光.以一种偶氮染料甲基橙为降解染料,研究了氧化锌/氧化铝光催化剂的光催化活性,表明其在紫外光辐照下具有良好的光催化活性.本实验确定了光催化降解甲基橙的最佳条件:催化剂的质量浓度为0.8 g/L,甲基橙的质量浓度为13 mg/L.%A polyacrylamide gel method was used to prepare ZnO/Al2O3 photocatalyst,where the photocatalytic activity of it was investigated.X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results indicated that the as-synthesized ZnO/Al2O3 photocatalyst crystallize majorly into ZnO and Al2O3 without the presence of any other impurities,such as Al (OH)3.Ultraviolet-visible absorption spectroscopy was applied to investigate the light-absorbing properties of ZnO/Al2O3photocatalyst,and it could response ultraviolet light.The photocatalysis experiments revealed that the ZnO/Al2O3 photocatalyst exhibited a pronounced photocatalytic activity for the methyl orange decomposition under ultraviolet light irradiation.The optimum conditions for the photocatalytic experiments of ZnO/Al2O3 photocatalyst were determined that the catalyst mass concentration was 0.8 g/L and the initial mass concentration of methyl orange was 13 mg/L.