纳米TiO2的均匀沉淀法制备及其光催化性能研究

以四氯化钛为原料,尿素为均匀沉淀剂,用动态开放回流系统的均匀沉淀法制备出锐钛矿型TiO2纳米粒子,并用XRD、TEM等进行了表征,所得产物粒度均匀,大小可控.探讨了部分实验条件对产品粒径的影响.并将普通TiO2与纳米TiO2的降解效果进行了比较.实验表明:普通TiO2和纳米TiO2作为光催化剂,均可以有效地对甲醛废水进行降解,纳米TiO2尤佳.甲醛溶液浓度为52.35 mg/L,纳米TiO2加入量6g/L,高压汞灯光照3 h,甲醛最大去除率可达56.6%.

The Preparation of Nanocrystalline Titanic Dioxide by Homogenous Precipitation Method and its Photocatalytic Analysis

Uniform TiO2 nanoparticles particles were prepared by homogeneous precipitation of boiling reflux in open system from TiCl4 solution under different experimental conditions.The products were characterized using X-ray diffraction(XRD) and scanning electron microscopy(SEM).The prepared particles were in little size distribution and good dispersion.The degradation of the effect of nano-TiO2 and normal TiO2 were also compared.And using Nano-titanium dioxide is better than normal titanium dioxide.Under the condi...