ZnO/LixNi1-xO光催化降解甲基橙的研究

采用溶胶凝胶法制备LixNi1-xO和ZnO粉体,利用球磨法制备ZnO/LixNi1-xO复合粉体,以紫外光为光源,通过降解甲基橙,研究了锂掺杂及n-p复合对氧化镍的光催化性能影响。结果表明：当投放量为0.1 g/L,x≤0.075（摩尔分数）的锂掺杂氧化镍均比未掺杂氧化镍的光催化活性高。当锂掺杂摩尔分数为0.025,投放量为0.4 g/L时锂掺杂氧化镍的光催化活性最佳,甲基橙最高降解率达到93.1%。当ZnO/Li0.025Ni0.975O在质量比为1∶1,投放量为0.2 g/L时光催化活性最佳,甲基橙最高降解率达到98.1%。

Study on photocatalytic degradation of methyl orange by ZnO/LixNi1-xO

LixNi1-xO and ZnO powders were prepared by sol-gel method.The composite powders of ZnO/LixNi1-xO were prepared by ball milling method.The effects of lithium-doping and n-p composition on the photocatalytic property of nickel oxide were investigated with the degradation of methyl orange under the UV-lamp.The results showed that the lithium-doped nickel oxides had higher photocatalytic activity than undoped nickel oxide when the amount of photocatalyst was 0.1 g/L and the amount of lithium,x（mole）,was less than or equal to 0.075.The maximum degradation rate of methyl orange was 93.1% when x=0.025 and the amount of photocatalyst was 0.4 g/L.The maximum degradation rate of methyl orange was 98.1% when the amount of ZnO/Li0.025Ni0.975O composite powders was 0.2 g/L and the mass ratio of ZnO/Li0.025Ni0.975O was 1∶1.