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Preparation of periodic mesoporous organosilica with large mesopores using silica colloidal crystals as templates

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Abstract

Organosiloxane-based mesoporous materials with periodically ordered pores (periodic mesoporous organosilica, PMO) have many applications due to their various organic functions, high surface areas, and large pore volumes. Conventional methods using surfactant templates (soft templates) are limited in terms of the diversity of organosilane precursors and precise control over the pore size in a relatively large mesopore region (10–50 nm). This paper demonstrates the preparation of PMOs with precisely controlled pore sizes (>10 nm in diameter) and various organosiloxane frameworks, using colloidal crystals of monodisperse silica nanospheres as a template. An inverse opal structure with interconnected spherical mesopores was obtained through polycondensation of hydrolyzed organoalkoxysilanes [(EtO)3Si-R-Si(OEt)3, R = C2H4, CH[double bond, length as m-dash]CH, and C6H4; PhSi(OEt)3], within the voids of silica colloidal crystals, followed by the preferential dissolution of silica under well-controlled basic conditions. The pore size varied depending on the size of the silica nanospheres. The versatility of this method will allow for the wide tuning of the physical and chemical properties of organosiloxane-based mesoporous materials.

Graphical abstract: Preparation of periodic mesoporous organosilica with large mesopores using silica colloidal crystals as templates

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Article information


Submitted
18 May 2020
Accepted
21 Jul 2020
First published
21 Jul 2020

Nanoscale, 2020, Advance Article
Article type
Paper

Preparation of periodic mesoporous organosilica with large mesopores using silica colloidal crystals as templates

N. Muramoto, T. Sugiyama, T. Matsuno, H. Wada, K. Kuroda and A. Shimojima, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR03837G

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