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Intercalation of silanes by ion imprinting method for improving hydrothermal stability of mesoporous silica

Paper ID Volume ID Publish Year Pages File Format Full-Text
54823 47027 2013 5 PDF Available
Title
Intercalation of silanes by ion imprinting method for improving hydrothermal stability of mesoporous silica
Abstract

Hydrothermal stability of mesoporous silica was improved by intercalation of CuAAPTS (3-(2-aminoethylamino) propyltrimethoxysilane, AAPTS) complex by means of ion imprinting method. The ion imprinting method involves ion exchange of Cu(AAPTS)22+ complex and covalent bond formation with surface silanol group, removing Cu2+ ion by protonation reaction with nitric acid, and decomposition of AAPTS by calcination. The improved hydrothermal stability by CuAAPTS modification is attributed to the highly crosslinked silica “pillars” as a result of condensation of AAPTS and surface silanol groups by means of covalent bonding; and hydrophobic surfaces without alteration of the wall thickness of MCM-41.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (110 K)Download as PowerPoint slideHighlights► Mesoporous silica with improved steam stability at 760 °C. ► Intercalation of AAPTS inside mesoporous channel by ion imprinting method. ► Improving hydrothermal stability due to pillars of crosslinking silica and hydrophobicity.

Keywords
Mesoporous silica; Hydrothermal stability; Ion imprinting; Cu-AAPTS complex
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 212, 1 September 2013, Pages 175–179
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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