镧掺杂氧化锌光催化降解染料废水研究

以醋酸锌和硝酸镧为原料,丙烯酰胺为单体,N,N’-亚甲基双丙烯酰胺为网络剂,过硫酸铵为引发剂,采用高分子网络凝胶法制备得到掺镧的Zn O纳米粉体。用制备的粉体对甲基橙进行光催化降解实验,考察了掺镧量对其光催化性能的影响。用X射线衍射仪、高分辨率透射电镜、X射线能谱仪、比表面积与孔隙率分析仪等对其进行表征。结果表明,镧的掺入提高了Zn O的光催化活性,镧锌摩尔质量比为0.2%时光催化性能最好,高压汞灯下反应1 h,甲基橙的脱色率为96.5%,相比于未掺杂的Zn O提高了11.5%。

Study on the Photocatalytic Degradation of Dye Wastewater by Lanthanum Doped Zinc Oxide

Lanthanum doped zinc oxide nanoparticles is prepared by polyacrylamide gel method using zinc actate and lan-thanum nitrate as raw material ,acrylamid as monomer ,N ,N’-methylenediacrylamide as lattice reagent and ammonium as initiator .The influences of the amount of doping lanthanum on ZnO on the photocatalysis are tested with a target pollutant methyl orange by the prepared powder .Analytical methods ,such as XRD ,TEM ,XPS and BET are utilized in this study . The results show that lanthanum doped on ZnO can improve its photocatalytic activity .Nanomaterial can reach the maximum photocatalytic effect when the doping amount of lanthanum is 0 .2% ,after treatment under high pressure mercury lamp irra-ditation for one hour ,the decolorization rate of methyl orange is 96 .5% and compared with pure ZnO ,the decolorization rate is increased by 11 .5% .