Synthesis, characterization and catalytic activity of ordered SBA-15 materials containing high loading of diamine functional groups

Autor:	Jerry C. C. Chan, Soofin Cheng, Xueguang Wang, Yao-Hung Tseng
Rok vydání:	2006
Předmět:	Chemistry General Chemistry Condensed Matter Physics Heterogeneous catalysis Catalysis chemistry.chemical_compound Chemical engineering Mechanics of Materials Diamine Amphiphile Copolymer Organic chemistry Surface modification General Materials Science Knoevenagel condensation Mesoporous material
Zdroj:	Microporous and Mesoporous Materials. 95:57-65
ISSN:	1387-1811
DOI:	10.1016/j.micromeso.2006.05.003
Popis:	Diamine-functionalized mesoporous SBA-15 materials have been synthesized by co-condensation of tetraethylorthosilicate (TEOS) with [3-(2-aminoethyl aminopropyl)]trimethoxysilane (ATMS) using amphiphilic block copolymer P123 as pore-directing agent under the aid of inorganic salt NaCl and with prehydrolysis of TEOS prior to the addition of organosiloxane. The functionalized materials have hexagonal mesostructure ordering, narrow pore-size distribution with diameter around 60 A ˚ , and high loadings of amino groups (up to 3.49 mmol g � 1 ). Prehydrolysis of TEOS was a key step for preparation of well-ordered mesoporous materials with amino functionalities. Inorganic salt had great influence on the ordering of mesostructure and the morphology of the resultant materials. The diamine-functionalized materials showed better catalytic performance than the aminopropyl-functionalized counterpart in the Knoevenagel reaction of benzaldehyde with ethyl cynoacetate to form a,b-unsaturated compound in liquid phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d402533a21fc71fa0efc5c1351ef077a https://doi.org/10.1016/j.micromeso.2006.05.003 Zobrazit plný text záznamu Full Text from ScienceDirect