Journal of Changshu Institute of TechnologyIssue(4)：55-61,7.
铈掺杂纳米ZnO的制备及光催化降解染料废水
Synthesis of ZnO Nanometer Powders Doped with Ce4+ Ions and the Photocatalytic Degradation of Dying Wastewater
摘要
Abstract
Ce4+-doped nanometer ZnO powder was synthesized by so-l gel method. The microstructures and prop-erties of the samples were characterized by means of XRD, UV-Vis and FTIR. The results indicated that the Ce 4+was successfully incorporated into ZnO, and that the diameter of nanometer was about 10.7 nm, and induced the red shifting in the UV-Vis spectra. The photocatalytic activity of the samples was investigated using methylene blue (MB) as the model reaction under the irradiation with ultraviolet light. The results showed that the doping of Ce4+ could increase the photocatalytic activities of ZnO nanopowders and that the best molar ratio of Ce4+ was n(Ce)/n(Zn)=0.05, that the surfactant was sodium dodecyl sulfate, and that the nanometer ZnO was calcinated at 550 ℃ for 3 hours. At the same time, the effect of photocatalytic efficiency through the pH of MB, the amount of catalyst, and effect of illumination time were also inspected. The experimental results revealed that the initial mass concentration of MB was 10 mg /L, that the pH value was 7-8, that the dosage of Ce4+/ZnO photo-catalyst was 5 g/L, that the UV-irradiation time was 2 h, and that the removal rate of MB reached above 85%. Under the optimized conditions, the degradation rate of real dye wastewater was up to 87.67% and removal efficiency of COD was 63.5%.关键词
铈掺杂纳米氧化锌/光催化降解/亚甲基蓝Key words
Ce4+-doped nanometer ZnO powder/photocatalytic degradation/methylene blue分类
化学化工引用本文复制引用
顾桂山,张园园,黄驰,孙立,汪学英..铈掺杂纳米ZnO的制备及光催化降解染料废水[J].Journal of Changshu Institute of Technology,2014,(4):55-61,7.基金项目
常熟市科技局项目“复合纳米光催化材料的制备及土壤修复研究”（cs201110）；江苏省大学生实践创新训练计划项目“微纳米磁性光催化剂的合成及其在印染废水处理中的应用” （）
