反相单微乳液法制备纳米二氧化铈及其形貌和分散性研究  

Preparation of nano-sized cerium dioxide by single reverse microemulsion method and study on dispersion and morphology

作　　者：范方强[1] 余林[1] 孙明[1] 刁贵强[1] 缪飞[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《无机盐工业》2009年第3期22-24,62,共4页Inorganic Chemicals Industry

基　　金：国家自然科学基金(20203012);广东省高等学校自然科学研究重点项目(062011);广东省自然科学基金团队项目(4205301);广州市科技计划项目(2006J1-C0501)

摘　　要：以六水硝酸铈和氨水为原料,使用单微乳型,在烷基酚聚氧乙烯(10)醚(OP-10)/正丁醇/环己烷/水溶液组成的水/油型微乳液体系中,制备了纳米二氧化铈微粒。利用XRD,TG-DSC,TEM,UV-VIS等对样品进行表征。TEM表明:体系环己烷含量主要影响产物纳米二氧化铈微粒的分散性;体系中水与OP-10的物质的量比和反应温度对产物微粒的形貌影响显著。当反应温度为25℃,环己烷占3个有机组分的质量分数为60%、水与OP-10的物质的量比为15时,可制备出分散性好的球形纳米二氧化铈微粒,粒径约4 nm。硅烷偶联剂A-1120的表面修饰更加显著地提高了纳米颗粒的分散性。UV-VIS表明:纳米二氧化铈具有优异的紫外吸收性能。Using cerium nitrate and ammonia as raw materials, cerium oxide nanoparticles were synthesized by single reverse microemulsion method in water/oil microemulsion system consisted of polyoxyethylene octyphenol（ 10） ether （OP- 10）/normal butanol/cyclohexane/water solution. Samples were characterized by X - ray diffraction （ XRD） , thermogravimetric-differential scanning calorimeny （ TG - DSC ） , transmission electron microscope （ TEM ） , and ultraviolet-visible spectrophotometry （ UV - VIS）. TEM micrographs revealed that cyclohexane content in the system had great influence on the dispersion of cerium oxide nanoparticles;amount of substance ratio of water to OP - 10 and reaction temperature had a significant impact on particle morphology of the product. Spherical and inono-dispersed cerium oxide nanoparticles with particle size of about 4 nm were successfully prepared when temperature was 25 ℃ ,mass ratio of cyclohexane was 60% in the total three organic components and amount of substance ratio of water to OP - 10 was 15. The dispersion of nano-sized cerium oxide could be improved remarkably by using silane coupling agent A - 1120 as a surface modification agent. UV - VIS showed that cerium oxide nanoparticles had excellent ultraviolet absorption capability.

关 键 词：微乳液法 表面修饰 纳米二氧化铈 

分 类 号：TQ133.3[化学工程—无机化工]