Adsorption and Functionality of spherical mesoporous silica beads

球形介孔二氧化硅珠的吸附和功能

基本信息

批准号：
13650834
负责人：
MIYAKE Yoshikazu
金额：
$ 2.37万
依托单位：
Kansai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

1. Formation Process of Spherical Mesoporous Silica: Formation process of nano-meso structure of spherical mesoporous silica was studied by dispersing the hydrophobic tetrabutoxysilane (TBOS) into aqueous phase dissolved a surfactant. After 3 hours of reaction the surfactant was solubilized into TBOS phase with water molecules, and the W/O microemulsions of the diameter about 3.0 nm were formed in TBOS phase. The peak of SAXS pattern for the TBOS gel solution was observed after about 6 hours. This result indicates that the ordered nano-sized structure in TBOS phase was formed. The spherical mesoporous silica beads with the reversed hexagonal structure were prepared after 8 hours. The adsorption quantity of the phenol in aqueous phase into the spherical mesoporous silica (reversed MCM41) was larger than that into hexagonal structure of MCM 41, because the reversed MCM 41 has a continuous structure of surfactants.2. Surface-functionalized mesoporous silica: Amino-functionalized mesoporous silica was prepared by adding the tetraetoxysilane (TEOS) and 3-aminopropyltriethoxysilane (SAPS) simultaneously into the surfactant solution. The ordered structure of the modified mesoporous silica was transferred from lamellar to hexagonal with the increase the TEOS contents. The surfactant in mesoporous silica can be extracted with alcohol solution. It will be expected that the mesoporous silica modified with amino group can be adsorbed the cause chemicals of the sick-house syndrome as formaldehyde.Thiol-functionalized mesoporous silica was prepared by using the lauryl amine as a surfactant. The mesoporous silica can be adsorbed the silver ion in the aqueous phase. As the results, the mesoporous silica will be expected the high performance of adsorption of the low concentration of toxic mercury in the aqueous phase.

1。球形介孔二氧化硅的形成过程：通过将疏水性四氧基硅烷（TBOS）分散到水相中，研究了球形介孔二氧化硅的纳米 - 膜结构的形成过程。反应3小时后，将表面活性剂与水分子溶解为TBOS相，并在TBOS相中形成了约3.0 nm的直径的W/O微乳液。大约6小时后观察到TBOS凝胶溶液的SAXS图案峰。该结果表明在TBOS相中形成了有序的纳米大小结构。 8小时后，制备了带有反向六角形结构的球形介孔二氧化硅珠。在水相中，酚在球形介孔二氧化硅（反向MCM41）中的吸附量大于MCM 41的六边形结构，因为反向MCM 41具有表面活性剂的连续结构。2。表面官能化的介孔二氧化硅：通过将四氧基硅烷（TEOS）和3-氨氨基丙基三乙氧基硅烷（SAPS）同时加入外表面溶液中来制备氨基官能化的介孔二氧化硅。修饰的介孔二氧化硅的有序结构从层层转移到六角形，随着TEOS含量的增加。介孔二氧化硅中的表面活性剂可以用酒精溶液提取。可以预期，用氨基甲醛作为甲醛的化学物质吸附的介孔二氧化硅可以通过使用Lauryl胺作为表面活性剂作为甲醇官能化的中氧化二氧化硅。介孔二氧化硅可以在水相中吸附到银离子。结果，将期望介孔二氧化硅会在水相中低浓度的有毒汞吸附。