沉淀法制备硅藻土负载纳米二氧化钛试验研究  

Study on Preparation of Nano-TiO_2 Immobilized onto Diatomite through Precipitation Method

作　　者：缪茜[1] 李宁[1] 王佼[1] Miao Qian;Li Ning;Wang Jiao(School of Basic Education,Beijing Polytechnic College,Beijing 100042)

机构地区：[1]北京工业职业技术学院基础教育学院,北京100042

出　　处：《非金属矿》2018年第6期19-21,共3页Non-Metallic Mines

基　　金：北京市人才强教项目资助(PHR201008101);北京市教委科技计划项目支持(KM201110853003);北京工业职业技术学院重点课题支持(bgzykyz201407)

摘　　要：以硫酸氧钛为原料,硅藻土为载体,利用氨水作为沉淀剂制备硅藻土负载纳米二氧化钛。研究了反应物浓度、pH值和水解温度对反应的影响。结果表明,最佳制备条件为:硫酸氧钛浓度0.02 mol/L,二氧化钛和载体硅藻土质量比1∶3,反应pH值1.5,水解温度70℃。通过SEM分析样品可知,二氧化钛微粒在硅藻土表面均匀分散,结晶良好,覆盖率为67.42%,颗粒平均粒径为402 nm。Nanometer titanium dioxide particles were prepared by precipitation method using diatomite as the carrier, TiOSO_4 as the raw material and ammonium hydroxide as the precipitator. The effects of the mass ratio of diatomite to titanium dioxide, pH value, reaction temperature were studied. The results show that the best preparing conditions are as follows： the concentration of TiOSO_4 was 0.02 mol/L, the quantity ratio between titanium dioxide and diatomite was 1∶3, the pH value of reaction system was 1.5, the reaction temperature was 70 ℃. Under the optimum preparation conditions, the maximum loading rate was 67.42%, and the average diameter of loaded particles was 402 nm.

关 键 词：硫酸氧钛 负载 硅藻土 纳米二氧化钛 

分 类 号：TB332[一般工业技术—材料科学与工程]