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.
出处
《化学研究》
CAS
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)
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
organically modified silica
surface modification
ZnO nanoparticles
preparation
photocatalytic activity
UV-shielding ability
