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Sol-gel derived oxides and mixed oxides catalysts with narrow mesoporous distribution
作者姓名:姚楠  熊国兴  张玉红  杨维慎
基金项目:Acknowledgements This work was supported by the Chinese Academy of Sciences, the Research Institute of Petroleum Processing SINOPEC and the National Natural Science Foundation of China (Grant Nos. 20073043 and 29873050).
摘    要:A novel sol-gel process for preparing oxides and mixed oxides sols from precipitation and peptization process is reported in this article. Inorganic salts are used as raw materials in this study. It is found that the amount of acid has great influence on the stability and particle diameter distribution of the precursor sols. Ultrasonic treatment is used to prepare alumina sol at room temperature. The result of 27AI NMR shows that there exist AI_13~(7+) species in the sol. By controlling the sol particles with narrow particle diameter distribution, alumina, titania and silica-alumina (SA) materials with narrow mesoporous distribution are formed by regular packing of sol particles during gelation without using any templates. The results also show that the structure and particle diameter distribution of precursor sol determine the final materials' texture.

收稿时间:2 February 2001

Sol-gel derived oxides and mixed oxides catalysts with narrow mesoporous distribution
YAO Nan,XIONG Guoxing,ZHANG Yuhong,YANG Weishen.Sol-gel derived oxides and mixed oxides catalysts with narrow mesoporous distribution[J].Science in China(Chemistry),2001,44(4):387-398.
Authors:YAO Nan  XIONG Guoxing  ZHANG Yuhong  YANG Weishen
Institution:Dalian Institute of Chemical Physics, Chinese Academy of Sciences,
Abstract:A novel sol-gel process for preparing oxides and mixed oxides sols from precipitation and peptization process is reported in this article. Inorganic salts are used as raw materials in this study. It is found that the amount of acid has great influence on the stability and particle diameter distribution of the precursor sols. Ultrasonic treatment is used to prepare alumina sol at room temperature. The result of 27AI NMR shows that there exist AI_13~(7+) species in the sol. By controlling the sol particles with narrow particle diameter distribution, alumina, titania and silica-alumina (SA) materials with narrow mesoporous distribution are formed by regular packing of sol particles during gelation without using any templates. The results also show that the structure and particle diameter distribution of precursor sol determine the final materials' texture.
Keywords:sol-gel  mesopore  oxides  mixed oxides  catalysts  
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