Effects of Heterogeneous Composite Agent Al2O3 on Phase Transition Process and Particle Growth of TiO2 Nanocrystal

Abstract

Abstract: TiO₂composite oxide nanocrystals were prepared by a chemical co-precipitation method with Al₂O₃ as heterogeneous composite agent and TiCl₄ as starting materials. The influences
of the heterogeneous composite agent on TiO₂ phase transition process, particles growth and optical absorbance in UV and visible region were studied in detail, and the composite structure was
elementarily concluded. The results show that after compounded by Al₂O₃, the phase transition process and particles growth of TiO₂ oxcide nanocrystal are restrained notablely. TiO₂ composite
oxide nanocrystals are with anatase structure entirely after calcined at 900℃, and well mixed crystalline structure in the range of 950～1050℃, and the particles after calcined at 950℃
are spherical, average diameter 20～30nm, dispersed equably, and have no reuniting phenomenon, and have the super optical absorbance in UV-Vis region than TiO₂ nanocrystal after calcined at 700℃.

Key words: TiO₂, Al₂O₃, heterogeneous agent, composite nanocrystal

CLC Number:

TB383

WANG Zhi-Yi,CUI Zuo-Lin. Effects of Heterogeneous Composite Agent Al₂O₃ on Phase Transition Process and Particle Growth of TiO₂Nanocrystal[J]. Journal of Inorganic Materials.

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Effects of Heterogeneous Composite Agent Al₂O₃ on Phase Transition Process and Particle Growth of TiO₂Nanocrystal

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