摘要
使用1,2-二(三甲氧基甲硅烷基)乙烷和正硅酸甲酯两种硅脂分别与3-巯丙基三乙氧基硅烷共缩聚,合成出巯基修饰的含有乙烷桥键的硅基介孔材料(BM-n)以及巯基修饰的纯硅基介孔材料(TM-n),并用浓硝酸将其氧化,顺利的把修饰的巯基官能团氧化成磺酸基团(-SO3H)。使用SEM、TEM、小角度XRD和N2吸附脱附仪、FT-IR、元素分析、固体13 C-NMR等多种手段对其进行了表征。把得到的材料作为固体酸催化剂,催化丙酸与乙醇的酯化反应。结果表明骨架疏水性更强的乙烷桥键介孔硅基磺酸材料表现出更高的催化活性。
Thiol-functionalized mesoporous ethane-silicas were synthesized by cocondensation of 1,2-bis（trimethox- ysily） ethane （BTME） with 3-mercaptopropyltrimethoxysilane （MPTMS）. While ordered thiol-functionalized mesoporous silica was also successfully synthesized via cocondensation of tetramethyl orthosilicate （TMOS） and 3-mercaptopropyltrim- ethoxysilane （MPTMS）. And then the oxidation of thiol to sulfonic acid groups were carried out with concentrated nitric acid solution as the oxidizing agent. SEM, TEM, FT-IR, ^13C-NMR, XRD, nitrogen adsorption and desorption, TGA and elemental analysis were used to characterize the obtained materials. The functionalization of mesoporous materials with sulfonic acid groups was used as solid acid catalysts in the esterification reaction of the catalytic-propionic acid with ethanol.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第8期43-45,共3页
New Chemical Materials
基金
国家自然科学基金(21104070)
郑州轻工业学院博士启动基金(2011BSJJ011,2011BSJJ010)
关键词
纳介孔材料
共缩聚法
巯基功能化
催化
酯化反应
mesoporous material, cocondensation, functionalization with thiol, catalysis, esterification reaction
