Novel thiol-functionalized mesoporous silica nanorods （MSNRs） were synthesized through a base co-condensation method, in which two organoalkoxysilanes, tetraethoxylsilane （TEOS） and bis[3-（triethoxysilyl）propyl]...Novel thiol-functionalized mesoporous silica nanorods （MSNRs） were synthesized through a base co-condensation method, in which two organoalkoxysilanes, tetraethoxylsilane （TEOS） and bis[3-（triethoxysilyl）propyl]tetrasulfide （TESPT）, were used as silica precursors simultaneously. TESPT was firstly used for both morphology control and inner surface functionalization of mesoporous silica hybrid materials. The micro- structures as well as porous character of the MSNRs were characterized by means of SEM, XRD, TEM and N2 sorption measurements. Infrared spectrum analysis and heavy metal ions （Ag＋ and Cd2＋） adsorption measurements were carried out to confirm the functionalized framework of MSNRs.展开更多
In this paper, a new type of anionic surfactant containing four carboxylates was synthesized by a four-step synthetic reaction including bromination reaction and primary amide protective reaction. Intermediates and fi...In this paper, a new type of anionic surfactant containing four carboxylates was synthesized by a four-step synthetic reaction including bromination reaction and primary amide protective reaction. Intermediates and final products of each step in the whole synthetic process were characterized by IH NMR and MS. Purification of the anionic surfactant was accomplished through combination of recrystallization and silica gel column chromatography. The structure and the critical micelle concentration （CMC） of this surfactant at different temperatures were also investigated. Unlike traditional mono- carboxylate surfactant easy to form lamellar mesostructure, this surfactant has the hexagonal mesophase structure and comparatively low CMC, hopefu.lly to be applied in the preparation of mesoporous metal oxides.展开更多
文摘Novel thiol-functionalized mesoporous silica nanorods （MSNRs） were synthesized through a base co-condensation method, in which two organoalkoxysilanes, tetraethoxylsilane （TEOS） and bis[3-（triethoxysilyl）propyl]tetrasulfide （TESPT）, were used as silica precursors simultaneously. TESPT was firstly used for both morphology control and inner surface functionalization of mesoporous silica hybrid materials. The micro- structures as well as porous character of the MSNRs were characterized by means of SEM, XRD, TEM and N2 sorption measurements. Infrared spectrum analysis and heavy metal ions （Ag＋ and Cd2＋） adsorption measurements were carried out to confirm the functionalized framework of MSNRs.
文摘In this paper, a new type of anionic surfactant containing four carboxylates was synthesized by a four-step synthetic reaction including bromination reaction and primary amide protective reaction. Intermediates and final products of each step in the whole synthetic process were characterized by IH NMR and MS. Purification of the anionic surfactant was accomplished through combination of recrystallization and silica gel column chromatography. The structure and the critical micelle concentration （CMC） of this surfactant at different temperatures were also investigated. Unlike traditional mono- carboxylate surfactant easy to form lamellar mesostructure, this surfactant has the hexagonal mesophase structure and comparatively low CMC, hopefu.lly to be applied in the preparation of mesoporous metal oxides.
