文献类型：期刊文献

英文题名：Mechanism analysis and preparation of core-shell TiO₂/SiO₂ nanoparticles by H₂/air flame combustions

作者：Hu Yan-Jie; Li Chun-Zhong; Cong De-Zi; Jiang Hai-Bo; Zhao Yin

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2007

卷号：22

期号：2

起止页码：205

外文期刊名：JOURNAL OF INORGANIC MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000245348000003)】；

语种：英文

外文关键词：H-2/air flame; flame combustions; core-shell; TiO2; SiO2

摘要：Core-shell TiO2/SiO2 nanoparticles were synthesized successfully by H-2/Air flame combustions, and the formation mechanism of core-shell nanoparticles was analyzed. The structures and properties of these TiO2/SiO2 particles were investigated by using TEM, HRTEM, XRD and FTIR. The transformation from anatase to rutile and the grain growth are hindered due to the addition of silica into matrix. Both the chemical reaction rate and the nucleation rate of TiO2 particles are much faster than those of SiO2. The formation of primary TiO2 particles is faster than that Of SiO2 in the third jet due to the low temperature and nuclear rate. Heterogeneous nucleaton Of SiO2 on the surface of TiO2 is the main reason of core-shell nanocomposites formation.