有机修饰氧化硅对抗紫外纳米ZnO的原位表面修饰  

Preparation of ultraviolet-screening zinc oxide nanoparticles in-situ surface-capped with organically modified silica

作　　者：曹智[1] 张治军[1] 

机构地区：[1]河南大学特种功能材料教育部重点实验室,河南开封475004

出　　处：《化学研究》2011年第2期9-16,共8页Chemical Research

基　　金：高等学校博士学科点专项科研基金项目(20060475001)

摘　　要：以正硅酸乙酯和二甲基二乙氧基硅烷作为共前驱体,通过溶胶-凝胶反应得到有机修饰氧化硅;用有机修饰氧化硅对碱式碳酸锌进行原位表面改性,通过对表面改性碱式碳酸锌进行热处理得到表面改性纳米ZnO;分析了表面改性纳米ZnO的结构和性能.结果表明,经有机修饰氧化硅改性处理的纳米ZnO具有强憎水性,与有机相的相容性较强,光催化活性得到有效抑制,在保留紫外屏蔽性能的同时可见光透过性得到提高.Tetraethyl orthosilicate and dimethyldiethoxysilane were used as coprecursors to prepare organically modified silica（ormosil） via sol-gel process.Resultant ormosil was used to in-situ modify zinc carbonate hydroxide.The in-situ surface-modified zinc carbonate hydroxide was then calcinated to generate ZnO nanoparticles in-situ surface-capped with ormosil.The microstructure and performance of the surface-capped ZnO nanoparticles were investigated.It was found that ormosil-capped ZnO nanoparticles had strong hydrophobicity and good compatibility with organic phase,as well as effectively decreased photocatalytic activity,increased visible light transmittance,and almost unchanged ultraviolet-shielding ability.

关 键 词：有机修饰氧化硅 表面改性 纳米氧化锌 制备 光催化活性 紫外屏蔽性能 

分 类 号：O614.24[理学—无机化学] TQ658.2[理学—化学]