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无机材料学报

• 研究论文 • 上一篇    下一篇

溶胶—凝胶法制备纳米级SnO2

潘庆谊; 董晓雯; 张剑平; 何丽芬   

  1. 上海大学化学化工学院化工系;上海 200072
  • 收稿日期:1996-07-09 修回日期:1996-09-09 出版日期:1997-08-20 网络出版日期:1997-08-20

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

PAN Qingyi; DONG Xiaowen; ZHANG Jianping; HE Lifen   

  1. Dept. of Chem. Eng. Shanghai University Shanghai 200072 China
  • Received:1996-07-09 Revised:1996-09-09 Published:1997-08-20 Online:1997-08-20

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摘要： 本文以无机试剂为原料，采用溶胶—凝胶法制备了纳米级SnO2.以TG－DTA热分析、红外光谱及XRD、TEM等测试手段对纳米级SnO2的晶粒生长过程进行了研究．结果表明，当热处理温度＜500℃时，晶粒生长缓慢，在600℃热处理2h，能得到晶粒尺寸在十几纳米的SnO2颗粒．而600℃以上的热处理，有可能使晶粒迅速粗大．应用相变理论计算得温度＜500℃热处理2h时，晶粒生长活化能为7．02kJ·mol-1，＞500℃时，晶粒生长活化能为26．55kJ·mol-1.

关键词: 氧化锡, 纳米级, 溶胶-凝胶, 晶粒生长

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