Nanometer-sized SnO2 Particles Prepared by a Sol-Gel Method

Abstract

Abstract: Nanometer-sized SnO₂ particles were prepared by a sol-gel method using inorganic salt as a starting material. The crystallization process of the nano-SnO₂
was investigated by means of TG--DTA, IR absorption spectra, X-ray diffractometry and TEM. The investigated results indicated that the grain size of SnO₂
increased slowly with annealing temperature up to 500℃ but grew rapidly when the annealing temperature was higher than 600℃. Well-crystallized nano-SnO₂
with size 10～20 nm was obtained at 600℃. The activation energies for growth of nano-SnO₂ were calculated to be 7.02kJ·mol^-1 with the
annealing temperature up to 500℃ and 26.55kJ·mol^-1 when the annealing temperautre was higher than 500℃. The advantages of nano-SnO₂
as a material of gas sensor were also discussed.

Key words: sol-gel, nanometer-sized, tin oxide, grain growth

PAN Qingyi,DONG Xiaowen,ZHANG Jianping,HE Lifen. Nanometer-sized SnO₂ Particles Prepared by a Sol-Gel Method[J]. Journal of Inorganic Materials.

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Nanometer-sized SnO₂ Particles Prepared by a Sol-Gel Method

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