A series of materials Ce0.3+xZr0.6-xY0.1O1.95 were prepared by co-precipitation routine and the property of these materials was studied by means of oxygen storage capacity, temperature programming reduction, X-ray dif...A series of materials Ce0.3+xZr0.6-xY0.1O1.95 were prepared by co-precipitation routine and the property of these materials was studied by means of oxygen storage capacity, temperature programming reduction, X-ray diffraction, transmission electronic microscope, and X-ray photoelectron spectroscopy. The results indicate that the materials with a low Ce/Zr molar ratio possess higher cerium atom utilization ratio, reducibility and thermal stability than the materials with a high Ce/Zr ratio, and Ce0.35Zr0.55Y0.1O1.95 possesses the best properties.展开更多
[目的]研究过二硫酸钾氧化降解DDT反应的影响因素。[方法]考查pH值、氧化剂浓度、超声和紫外光对过二硫酸钾氧化降解DDT反应的影响,并应用于淡水和海水中。[结果]结果表明,随pH值的降低、过二硫酸钾浓度的升高,氧化降解DDT的效果越好。...[目的]研究过二硫酸钾氧化降解DDT反应的影响因素。[方法]考查pH值、氧化剂浓度、超声和紫外光对过二硫酸钾氧化降解DDT反应的影响,并应用于淡水和海水中。[结果]结果表明,随pH值的降低、过二硫酸钾浓度的升高,氧化降解DDT的效果越好。超声和紫外光的协同作用对反应的促进作用更大。应用于淡水和海水中氧化降解DDT,1.0 h DDT的降解率达90%,2.5 h DDT的降解率达99%。[结论]用过二硫酸钾氧化降解环境水中的DDT是一个适用范围较、效率高的简捷方法。展开更多
文摘A series of materials Ce0.3+xZr0.6-xY0.1O1.95 were prepared by co-precipitation routine and the property of these materials was studied by means of oxygen storage capacity, temperature programming reduction, X-ray diffraction, transmission electronic microscope, and X-ray photoelectron spectroscopy. The results indicate that the materials with a low Ce/Zr molar ratio possess higher cerium atom utilization ratio, reducibility and thermal stability than the materials with a high Ce/Zr ratio, and Ce0.35Zr0.55Y0.1O1.95 possesses the best properties.
文摘[目的]研究过二硫酸钾氧化降解DDT反应的影响因素。[方法]考查pH值、氧化剂浓度、超声和紫外光对过二硫酸钾氧化降解DDT反应的影响,并应用于淡水和海水中。[结果]结果表明,随pH值的降低、过二硫酸钾浓度的升高,氧化降解DDT的效果越好。超声和紫外光的协同作用对反应的促进作用更大。应用于淡水和海水中氧化降解DDT,1.0 h DDT的降解率达90%,2.5 h DDT的降解率达99%。[结论]用过二硫酸钾氧化降解环境水中的DDT是一个适用范围较、效率高的简捷方法。
