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Journal of Inorganic Materials

Journal of Inorganic Materials >

2007 , Vol. 22 >Issue 2: 205 - 208

DOI: https://doi.org/10.3724/SP.J.1077.2007.00205

Research Paper

Mechanism Analysis and Preparation of Core-shell TiO2/SiO2 Nanoparticles by H2/Air Flame Combustions

  • HU Yan-Jie ,
  • LI Chun-Zhong ,
  • Cong De-Zi ,
  • JIANG Hai-Bo ,
  • ZHAO Yin
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  • Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Received date: 2006-03-10

  Revised date: 2006-06-01

  Online published: 2007-03-20

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Abstract

Core-shell TiO2/SiO2 nanoparticles were synthesized successfully by H2/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.

Key words： H2/air flame; flame combustions; core-shell; TiO2; SiO2

Cite this article

HU Yan-Jie , LI Chun-Zhong , Cong De-Zi , JIANG Hai-Bo , ZHAO Yin . Mechanism Analysis and Preparation of Core-shell TiO2/SiO2 Nanoparticles by H2/Air Flame Combustions[J]. Journal of Inorganic Materials, 2007 , 22(2) : 205 -208 . DOI: 10.3724/SP.J.1077.2007.00205

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