Solvent effects on BMS silica formation in a base-catalyzed sol-gel process
The effects of solvent properties on the formation and structure of bimodal mesopore silica (designated as BMS) are studied in a base-catalyzed sol-gel process. It is found that BMS can be synthesized over a wide range of solvent water content, but a narrow range of cosolvent alkan-1-ols content. Increasing the alkan-1-ols concentration or the carbon atom numbers in the alkan-1-ols molecules used leads to an even rapid hydrolysis and condensation of tetraethoxysilane (TEOS), thus a larger textural mesopore to be formed in the resulting BMS products. However, when an excessive amount of alcohol is added, the synthesis system will transform from the initial gelation (BMS) into a speedy formed deposition (MCM-41).
X.-Z. Wang X.-M. Lv W.-H. Li B. Zhong K.-C. Xie
Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province,Institute o State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, the Chinese Academy of Science
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）