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A Novel and Versatile Grafting Procedure : Toward the Highest Possible Sulfonation Degree of Mesoporous Silica

Titelangaben

Timm, Jana ; Marschall, Roland:
A Novel and Versatile Grafting Procedure : Toward the Highest Possible Sulfonation Degree of Mesoporous Silica.
In: Advanced Sustainable Systems. Bd. 2 (1 März 2018) Heft 3 . - No. 1700170.
ISSN 2366-7486
DOI: https://doi.org/10.1002/adsu.201700170

Angaben zu Projekten

Projektfinanzierung: Bundesministerium für Wirtschaft und Technologie

Abstract

Abstract A unique method for the postsynthetic functionalization of ordered mesoporous silica materials is described. The functionalization is done via a chemical vapor deposition?type method and leads to the quantitative reaction of isolated surface silanol groups of mesoporous silica materials with organosilane molecules. The result is a highly sulfonated material by anchorage of 3?mercaptopropyltrimethoxysilane molecules and subsequent oxidation of the thiol groups to sulfonic acid groups. Ordered mesoporous KIT?6 and SBA?15 are chosen as model systems. The sulfonated material exhibits a functionalization degree of 1.05 resp. 1.32 molecules nm?2, which is on the maximum of the theoretical achievable functionalization density resulting in high ion exchange capacities of 1.22 and 1.12 mmol g?1. The versatility and mildness of this method opens up functionalization possibilities for a wide range of other materials, which could be sulfonated or otherwise modified with silanes, and tailored for the further application in catalysis or as solid?state proton conductors.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: acidic solids
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 05 Sep 2018 06:17
Letzte Änderung: 06 Sep 2018 05:06
URI: https://eref.uni-bayreuth.de/id/eprint/45710