【作者】 宋宁； 黄兰粉； 陆平； 罗伟红； 袁杰； 万宁；

【Author】 Song Ning~(1*),Huang Lanfen~2,Lu Ping~(1,3),Luo Weihong~1,Yuan Jie~1,Wan Ning~1(1.Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;2.Sichuan Electromechanical Institute of Vocation and Technology,Panzhihua 617000,China;3.Panzhihua Iron and Steel Research Institute,Titanium Research Institute,Panzhihua 617000,China)

【机构】 昆明理工大学,冶金与能源工程学院； 四川机电职业技术学院材料工程系； 四川攀枝花攀钢钢铁研究院钛研究所；

【摘要】 论文对化学共沉淀法制备N、Zn共掺杂纳米TiO₂光催化剂及性能进行研究。采用TG-DTA、XRD、UV-VIS等手段对共掺杂的纳米TiO₂粉体进行表征。将制备的粉体应用于偶氮染料甲基橙为模拟污染物的有机废水进行光催化反应,测试了不同条件下N、Zn共掺杂的粉体对甲基橙的光催化降解性能。实验结果表明,在以7 mol/L氨水为N源,Zn掺杂量为2%,煅烧温度为500℃下制备的纳米粉体的光催化降解率最高,其光吸收区域由原来的紫外光区拓展至可见光区,光催化效率远比未掺杂的纳米TiO₂好。在太阳光下照射6 h,有超声分散、搅拌的条件下甲基橙的降解率为98.2%,重复使用4次后降解率仍达74.2%。更多还原

【Abstract】 In this paper,the coprecipitation method for fabricating TiO₂ nanometer powders codoped with N and Zn was studied. N and Zinc codoped nano TiO₂ were characterized by using TG-DTA,XRD,UV-VIS.Azodyes,methyl orange was used as the pollution reactant to evaluate the photo-catalytic activity of the NZTO catalyst samples by orthogonal experiments.In this study,under the condition of calcineing temperature of 500℃, the photocatalytic properties of 2 wt%Zn,7 mol/L codoped samples were the optima.Its absorption range was extended to the visible rang and photocatalysis ratio was higher than un-doped TiO₂ nanometer powders.Verification experiment in the optimum conditions showed that the degradation ratio of methyl orange reached 98.2%,under sunshine for 6 h,with ultrasound dispersing and whipping,and it’s still 74.2%four times reused.更多还原