新型复合纳米TiO2制备及性能实验设计

Preparation and performance experimental design of new composite nano-TiO2

利用常温络合-控制水解法,以四氯化钛、有机羧酸、氨水、硝酸铜、硝酸镍等原料制备铜/镍共掺杂的复合纳米TiO2透明乳液。使用XRD、纳米粒度分布分析仪、紫外-可见分光光度计等对样品的物相、粒径、光吸收、光催化等性质进行表征。将该透明乳液在模拟太阳光下对酸性红3R染料进行降解,分析了染料初始质量浓度、样品掺杂浓度、体系pH值、加热回流时间对光催化效果的影响。结果表明,当铜/镍掺杂量均为0.001 mol/L、体系pH值为5、回流时间为0时,复合纳米TiO2光催化性能最好。

The copper-nickel co-doped composite nano-TiO2 transparent emulsion is prepared by the normal temperature complexation-controlled hydrolysis method with titanium tetrachloride,organic carboxylic acid,ammonia water,copper nitrate,nickel nitrate and other raw materials.The XRD,nano-particle size distribution analyzer and UV-Vis spectrophotometer are used to characterize the properties of the phase,particle size,light absorption and photocatalysis.The transparent emulsion is adopted to degrade the acid red 3 R dye under simulated sunlight,and the effects of initial dye concentration,sample doping concentration,system pH value and heating reflux time on photocatalytic effect are analyzed.The results show that the photocatalytic performance of the composite nano-TiO2 is the best when the copper/nickel doping amount is 0.001 mol/L,the pH value of the system is 5,and the reflux time is 0.This experiment can be used as an open experiment for undergraduates majoring in physics,chemistry and materials,which can not only improve students’operational ability,but also train their innovative thinking.