Hydrothermal Synthesis of TiO2 Hollow Spheres Using Rapeseed Pollen Grains as Template

doi:10.3724/SP.J.1077.2008.00049

Abstract

Abstract: TiO₂ precursor/pollen grain core-shell composite materials were prepared by hydrothermal synthesis under ultrasound irradiation by using rapeseed pollen grains as template. The core of the pollen grain could be removed by calcination at 550℃ for 6h and the TiO₂ hollow spheres were consequently obtained. SEM, TG, XRD, FTIR and N₂adsorption were used to characterize the TiO₂/pollen grain core-shell composites and the hollow titania spheres. The results indicate that the ultrasound irradiation helps the dispersion of TiO₂ precursor on the pollen grains’ surface uniformly and the suitable amount of tetrabutyl titanate is 6.6g/g pollen, the proper temperature for the hydrothermal synthesis is 105℃. The final TiO₂hollow spheres with pure anatase phase, have narrow mesopore-size distribution, with an average pore radius of 1.9nm and BET surface area of 26.76m²·g^-1.

Key words: rapeseed pollen grain, hydrothermal, TiO₂, hollow sphere

CLC Number:

TQ174

LI Ping,ZENG Chang-Feng,ZHANG Li-Xiong,XU Nan-Ping. Hydrothermal Synthesis of TiO2 Hollow Spheres Using Rapeseed Pollen Grains as Template[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00049.

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Hydrothermal Synthesis of TiO2 Hollow Spheres Using Rapeseed Pollen Grains as Template

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