纳米TiO_2表面电位特性的研究  

Surface Charge Properties of Nano-titanium Dioxide

作　　者：林嵩[1] 徐宏[2] 古宏晨[2] 

机构地区：[1]华东理工大学材料学院,上海200237 [2]上海交通大学纳米材料科学与技术工程中心,上海200030

出　　处：《材料科学与工程学报》2004年第4期544-546,共3页Journal of Materials Science and Engineering

基　　金：十五攻关项目(2 0 0 1BA31 0A0 9)

摘　　要：纳米颗粒表面Zeta电位对颗粒的分散稳定性影响很大。本文研究了包覆SiO2 前后的纳米TiO2 在不同pH值条件下、不同溶剂 (水、乙二醇、乙醇 )以及不同离子浓度情况下的Zeta电位变化 ,并用质子迁移理论进行分析 ,为制备稳定的分散体系提供一定的理论指导。The Zeta potential of nanoparticles surface influences the dispersion stability of nanoparticles severely. The Zeta potential changes of the Nano-titanium dioxide(TiO 2) before and after coated with SiO 2 under different pH conditions are studied in this paper. The differences of Zeta potential of TiO 2 nanoparticles in three different solvents (water, ethylene glycol and ethanol) and in different ionic concentration solvent are also studied. The surface properties of TiO 2 nanoparticles are analyzed with proton transfer theory to provide theoretical guide for the improvement of dispersion stability.

关 键 词：纳米TIO2 纳米颗粒 ZETA电位 质子迁移理论 

分 类 号：TB383[一般工业技术—材料科学与工程]