摘要
为了抑制纳米氧化锌的光催化活性,通过硅酸钠水解生成二氧化硅对氧化锌进行表面包覆。对包覆二氧化硅的纳米氧化锌进行热处理,研究了二氧化硅对纳米氧化锌热稳定性的影响。利用X射线衍射仪(XRD)、氮吸附仪和高分辨透射电子显微镜(HRTEM)对所得样品进行表征,并对纳米氧化锌的光稳定性进行评价。结果表明,合适的热处理温度为600℃,适当的热处理有助于提高包覆层的均匀性和致密性,而且在热处理过程中纳米氧化锌的晶粒生长得到了有效抑制。
Nano - sized zinc oxide was coated with silica by using sodium silicate as raw material to inhibit its photocatalytic activity. SiO2 - coated zinc oxide was heat - treated, and the effect of silica on thermal stability of nano - sized zinc oxide was investigated. The prepared samples were characterized by XRD, BET, and HRTEM. The photo - stability of nano - sized zinc oxide was also evaluated. Results showed that the suitable calcination tempreture was 600 ℃, and the homogeneity and densification of coating layer was improved from suitable heat treatment. Moreover, the growth of nano- sized zinc oxide grains was efflectively suppressed in the process of heat treatment. Key words ： silica ; nano - sized zinc oxide ; surface treatment ; thermal stability
出处
《无机盐工业》
CAS
北大核心
2008年第12期21-23,共3页
Inorganic Chemicals Industry
基金
江苏省富民强县项目(BE2006373)
常州青年科技人才资助项目(CQ2006009)
关键词
二氧化硅
纳米氧化锌
表面处理
热稳定性
silica
nano - sized zinc oxide
surface treatment
thermal stability
