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›› 2005, Vol. 5 ›› Issue (2): 152-156.

• 过程与工艺 • 上一篇    下一篇

Study of the Gelling Process for the Preparation of Tin Oxide Materials Based on Tin Tetrabutoxide

黄瑞安,侯立松,赵启涛,任叔华   

  1. 中科院上海光学精密机械研究所
  • 出版日期:2005-04-20 发布日期:2005-04-20

Study of the Gelling Process for the Preparation of Tin Oxide Materials Based on Tin Tetrabutoxide

HUANG Rui-an,HOU Li-song,ZHAO Qi-tao,REN Shu-hua   

  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
  • Online:2005-04-20 Published:2005-04-20

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摘要： The gelling process in the preparation of tin oxide materials based on tin tetrabutoxide is studied. Sn(OBun)4 modified by two moles of acetylacetone (AcAc) has a stable six-member ring structure and is less susceptive to water. In a system with a lower molar ratio of acetylacetone to Sn(OBun)4 ([AcAc]/[Sn(OBun)4]<2.0) or a larger portion of water ([H2O]/[Sn(OBun)4]>2.5), colloidal suspension or white precipitation will take place. A system with molar ratios of both acetylacetone to Sn(OBun)4 and water to Sn(OBun)4 at 2.0 is transparent and olivaceous sol. As catalysts, hydrofluoric, hydrochloric, hydrobromic and acetic acids, and ammonia all accelerate the hydrolysis and condensation of Sn(OBun)4 during the sol-gel process. Light scattering measurement indicates that cluster size distribution in the sol system undergoes gradual broadening during the sol-gel transition.

关键词: sol gel, tin tetrabutoxide, hydrolysis, condensation

Abstract: The gelling process in the preparation of tin oxide materials based on tin tetrabutoxide is studied. Sn(OBun)4 modified by two moles of acetylacetone (AcAc) has a stable six-member ring structure and is less susceptive to water. In a system with a lower molar ratio of acetylacetone to Sn(OBun)4 ([AcAc]/[Sn(OBun)4]<2.0) or a larger portion of water ([H2O]/[Sn(OBun)4]>2.5), colloidal suspension or white precipitation will take place. A system with molar ratios of both acetylacetone to Sn(OBun)4 and water to Sn(OBun)4 at 2.0 is transparent and olivaceous sol. As catalysts, hydrofluoric, hydrochloric, hydrobromic and acetic acids, and ammonia all accelerate the hydrolysis and condensation of Sn(OBun)4 during the sol-gel process. Light scattering measurement indicates that cluster size distribution in the sol system undergoes gradual broadening during the sol-gel transition.

Key words: sol gel, tin tetrabutoxide, hydrolysis, condensation