锐钛型纳米TiO_2材料分散工艺与技术研究  

Research on dispersing technology of anatase TiO_2 nanoparticles

作　　者：匡亚川[1] 张召环 季小勇 张晓星[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]国网山东省电力公司经济技术研究院,山东济南250021 [3]湖南交通建设质量安全监督管理局,湖南长沙410116

出　　处：《合肥工业大学学报（自然科学版）》2017年第11期1478-1482,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51008314);湖南省交通科技资助项目(201107);长江学者和创新团队发展计划资助项目(IRT1296)

摘　　要：锐钛矿纳米TiO_2催化活性高,被应用于光催化降解汽车尾气中。然而,纳米TiO_2颗粒在溶液中容易产生自发的凝聚行为,严重影响了其光催化降解汽车尾气性能。文章通过试验研究了分散剂种类和掺量、分散方法、分散时间对锐钛矿纳米TiO_2分散性能的影响规律,并对锐钛矿纳米TiO_2在水中的分散稳定性进行了评价。试验结果表明,合适的分散剂先机械剪切搅拌然后进行超声波分散能够显著地提高锐钛矿纳米TiO_2在水中的分散稳定性。在试验的基础上,进一步研究了锐钛矿纳米TiO_2在溶液中的团聚机理,提出了一种改善锐钛矿纳米TiO_2在水溶液中稳定性的新方法。Anatase TiO2 nanoparticles are widely used in photocatalytic degradation of automobile exhaust be-cause of its high catalytic activity .However ,the spontaneous aggregation behavior of TiO 2 nanoparticles is easy to occur in aqueous solution ,which affects the photocatalytic performance seriously .The effects of types and concentration of dispersant ,dispersing method and time on the dispersibility of anatase TiO 2 nanoparticles are investigated experimentally ,and the dispersion stability of anatase TiO 2 nanoparticles in aqueous solution is evaluated .The experimental results show that the suitable dispersant as well as the method of high speed stirring at first and then ultrasonic dispersion can significantly improve the dispersion stability of anatase TiO 2 nanoparticles in aqueous solution .Based on the experiments ,the agglomeration mechanism of anatase TiO 2 nanoparticles in solution is further studied and a new method for improving the stability of anatase TiO 2 nano-particles in solution is proposed .

关 键 词：锐钛矿纳米TiO2 分散性能 分散剂 分散方法 评价方法 

分 类 号：TQ027.36[化学工程]