Journal article

Publication year: 2016

Pages: 25476-25488

Journal: ACS Applied Materials & Interfaces

Volume number: 8

Issue number: 38

ISSN: 1944-8244

DOI Link: https://doi.org/10.1021/acsami.6b08477

Publisher: American Chemical Society

Abstract: 
Porous organic-inorganic hybrid monoliths with hierarchical porosity exhibiting macro- and mesopores are prepared via sol-gel process under variation of the mesopore size. Organic moieties in the pore walls are incorporated by substituting up to 10% of the silicon precursor tetramethylorthosilicate with bisilylated benzene molecules. After functionalization with sulfonic acid groups, the resulting sulfonated hybrid monoliths featuring a bimodal pore structure are investigated regarding proton conduction depending on temperature and relative humidity. The hierarchical pore system and controlled mesopore design turn out to be crucial for sulfonation and proton conduction. These sulfonated hybrid hierarchical monoliths containing only 10% organic precursor exhibit higher proton conduction at different relative humidities than sulfonated periodic mesoporous organosilica made of 100% bisilylated precursors exhibiting solely mesopores, even with a lower concentration of sulfonic acid groups.

Harvard Citation style: von der Lehr, M., Seidler, C., Taffa, D., Wark, M., Smarsly, B. and Marschall, R. (2016) Proton Conduction in Sulfonated Organic-Inorganic Hybrid Monoliths with Hierarchical Pore Structure, ACS Applied Materials & Interfaces, 8(38), pp. 25476-25488. https://doi.org/10.1021/acsami.6b08477

APA Citation style: von der Lehr, M., Seidler, C., Taffa, D., Wark, M., Smarsly, B., & Marschall, R. (2016). Proton Conduction in Sulfonated Organic-Inorganic Hybrid Monoliths with Hierarchical Pore Structure. ACS Applied Materials & Interfaces. 8(38), 25476-25488. https://doi.org/10.1021/acsami.6b08477