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Citation: WANG Ting, JIANG Xin, LI Xi. Preparation of TiO₂ Nanoparticles on Surface of Different Supports by Adsorption Phase Reaction Technique[J]. Acta Physico-Chimica Sinica, ;2007, 23(09): 1375-1380. doi: 10.3866/PKU.WHXB20070913 shu

Preparation of TiO₂ Nanoparticles on Surface of Different Supports by Adsorption Phase Reaction Technique

1.
College of Material and Chemical Engineering, Zhejiang University, Hangzhou 310027, P. R. China

Received Date: 18 April 2007
Available Online: 28 June 2007

The influence of supports on the preparation of TiO2 nanoparticles in adsorption phase nanoreactor formed by the adsorption layer on silica surface was studied. Series temperature experiments of two types of supports (support A: size 20 nm, specific surface area 640 m2·g-1; support SiO2 B: size 12 nm, surface area 200 m2·g-1) were designed. Electronic energy spectrum indicated that the concentration of TiO2 on the two supports both decreased with temperature increasing. TiO2 quantity on support A decreased sharply between 40-60 ℃, whereas the coresponding temperature range for support B was between 30-50 ℃. TiO2 particles on support B were more uniform than those on support A in TEM. The grain size curve by XRD suggested that size of TiO2 particles on support A reduced with temperature rising and there was also a sharp decrease as in quantity curve of TiO2, but TiO2 particles on support B had a substantially constant size. Based on the characteristics of adsorption on silica surface, the generality of adsorption on SiO2 was proposed to explain the same changes in Ti concentration on different supports. The different characteristics of internal/external surface induced variant temperature-sensitivities and characteristics of adsorption on support surface. Moreover these different adsorptions led variance of content and grain size, as well as characteristics of TiO2 on the two types of supports.
- Adsorption phase reaction technique; TiO2 nanoparticles; Characteristics of support; Internal/external surface
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Preparation of TiO2 Nanoparticles on Surface of Different Supports by Adsorption Phase Reaction Technique

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Preparation of TiO₂ Nanoparticles on Surface of Different Supports by Adsorption Phase Reaction Technique