Synthesis of acid–base bifunctional mesoporous materials by oxidation and thermolysis
作者:Xiaofang Yu、Yongcun Zou、Shujie Wu、Heng Liu、Jingqi Guan、Qiubin Kan
DOI:10.1016/j.materresbull.2011.02.006
日期:2011.6
and solid-state 29 Si MAS NMR confirm that the organosiloxanes were condensed as a part of the silica framework. The bifunctional sample (SO 3 H–MCM-41–NH 2 ) containing amine and sulfonic acids exhibits excellent acid-basic properties, which make it possess high activity in aldol condensation reaction between acetone and various aldehydes.
摘要 开发了一种新型高效的酸碱双功能催化剂SO 3 H-MCM-41-NH 2 的合成方法。该方法是通过在十六烷基三甲基溴化铵 (CTAB) 存在下共缩合原硅酸四乙酯 (TEOS)、3-巯基丙基三甲氧基硅烷 (MPTMS) 和(3-三乙氧基甲硅烷基丙基)氨基甲酸-1-甲基环己酯(3TAME),然后氧化,然后热解来实现的产生酸性位和碱性位。X 射线衍射 (XRD) 和透射电子显微照片 (TEM) 表明所得材料保持介孔结构。热重分析 (TGA)、X 射线光电子能谱 (XPS)、反滴定、固态 13 C CP/MAS NMR 和固态 29 Si MAS NMR 证实有机硅氧烷缩合为二氧化硅骨架的一部分。