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采用固相研磨法制备Y2O3-TiO2复合半导体光催化剂和纯TiO2光催化剂。以甲基橙为降解目标物,研究了Y2O3掺杂TiO2为催化剂的紫外光催化反应,来探讨Y2O3掺杂对TiO2光催化降解甲基橙的可行性。并重点考察了Y2O3的掺杂量、催化剂的添加量、溶液初始浓度、光照时间、溶液pH值对降解率的影响。实验结果表明:单纯只靠紫外光光照或Y2O3掺杂并不能快速、有效地降解甲基橙。在Y2O3掺杂比为1.5%、催化剂用量为1.5 g/L、pH为6、初始浓度为10 mg/L的甲基橙,30w紫外灯光照降解1.5 h的条件下,甲基橙的降解率可达90.2%。
Y2O3-TiO2 composite semiconductor photocatalyst and pure TiO2 photocatalyst were prepared by solid-state milling. With methyl orange as the degradation target, the photocatalytic degradation reaction of methyl orange with TiO2 doped with Y2O3 was studied to investigate the feasibility of photocatalytic degradation of methyl orange with TiO2 doped with Y2O3. The effects of Y2O3 doping, catalyst loading, initial concentration of solution, illumination time and solution pH on degradation rate were investigated. The experimental results show that methyl orange can not be rapidly and effectively degraded simply by UV light or Y2O3 doping. Under the conditions of Y2O3 doping ratio of 1.5%, catalyst dosage of 1.5 g / L, pH 6, initial concentration of 10 mg / L methyl orange and 30w UV light irradiation for 1.5 h, the degradation rate of methyl orange Up to 90.2%.