电介质NaCl对改进的Stber法制备SiO_2胶体颗粒的影响  

Effect of Dielectric NaCl on SiO_2 Colloidal Particles Preparated with Improved Stber Method

作　　者：蔡允高[1] 董盈红[1] 王孝民[1] 

机构地区：[1]保山学院理工学院,云南保山678000

出　　处：《普洱学院学报》2014年第3期15-18,共4页Journal of Pu'er University

基　　金：保山学院科学研究基金项目(13BZ011)

摘　　要：以正硅酸乙酯(TEOS)为硅源,以20 ml TEOS,125 ml无水乙醇,6 ml 氨水,18 ml蒸馏水,在15~30 mg范围内调节电介质 NaCl 用量,通过改进的 St?ber 法得到了420~800 nm粒径范围内的SiO2胶体颗粒；利用 X 射线衍射仪(XRD)、扫描电子显微镜(SEM)等测试手段分析了 NaCl 用量对 SiO2胶体颗粒粒径及形貌的影响。结果表明,不同用量的NaCl能对SiO2胶体颗粒的单分散性、球形度等方面产生明显的影响；此外,对NaCl的作用机理进行了初步的探讨。Ethyl silicate (TEOS)is used as silicon source,the SiO2 colloidal particles with 420-800 nm diameters range were synthesized through the improved St?ber method by varying the a-mount of NaCl from 15 to 30 mg while keeping 20 ml TEOS,125 ml ethanol,6 ml ammonia,and 18 ml water;XRD and SEM were employed to analyze the effect of dielectric NaCl on the diameter and morphology of SiO2 colloidal particles.The results show that the different amount of dielectric NaCl could make an influence effect on the diameter and morphology of SiO2 colloidal particles.Besides,a preliminary study of the mechanism of dielectric NaCl was carried out.

关 键 词：SIO2 胶体颗粒 电介质NaCl 单分散性 球形度 

分 类 号：TQ127.2[化学工程—无机化工]