影响纳米TiO_2粒径的工艺因素

A study on the technological factors influencing the diameter of nanometer size-TiO_2 powder

采用均一沉淀法制备纳米TiO2。分析了影响晶粒径的工艺因素。研究表明通过改变反应物离子浓度、改变表面活性剂DBS和抑制剂H2SO4的加入量以及严格控制工艺参数。如反应时间、洗涤干燥方式和煅烧温度,可以获得颗粒均匀、分散性好的纳米TiO2。

The nanometer-size TiO2 powders was prepared by homogeneous precipitation method with TiOSO4 as raw material and urea as precipitationg agent.The technological factors influencing the diameter of nanometer size TiO2 were reviewed in this paper.Investigation shows that nanometer-size TiO2 powders,which has a narrow size distribution of diameter and a good dispersing property can be obtained by changing the content of Ti4+,urea,H2SO4 and surfactant DBS and controlling rigorously the technological factors,such as the reaction time and calcination temperature.