Inhibiting Effect of Aluminosilicate Intermediate on Agglomeration and Phase Transition of TiO2 Nanoparticles

Abstract

Abstract: By heating coal fly ash with hydroxide sodium solution, then hydrolysis, the aluminosilicate intermediate (ASI) was prepared. Through the addition of ASI into the titanium
sol obtained by using the sol-gel method, titanium-aluminosilicate (TiO₂/ASI) composites were prepared, and then heat-treated
at different temperatures. The formation process and phase transition of TiO₂ nanocrystalline in the TiO₂/ASI composites were characterized
by X-ray diffraction and UV-Vis diffuse reflectance spectra. The results indicate that the agglomeration of TiO₂ nanoparticles and their phase
transition from anatase to rutile can be inhibited efficiently. The adsorption activity of methylene blue of the synthesized TiO₂/ASI
composites is higher than that of only aluminosilicate intermediate or TiO₂ particles.

Key words: aluminosilicate intermediate, TiO₂, agglomeration, phase transition

CLC Number:

O643

CHANG Jia-Zhong,LI Min,WANG Zhen-Ling,SHI Heng-Zhen. Inhibiting Effect of Aluminosilicate Intermediate on Agglomeration and Phase Transition of TiO₂ Nanoparticles[J]. Journal of Inorganic Materials.

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Inhibiting Effect of Aluminosilicate Intermediate on Agglomeration and Phase Transition of TiO₂ Nanoparticles

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