Minute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silica

Handle URI:
http://hdl.handle.net/10754/598841
Title:
Minute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silica
Authors:
Chaignon, J.; Bouizi, Y.; Davin, L.; Calin, N.; Albela, B.; Bonneviot, L.
Abstract:
© The Royal Society of Chemistry 2015. Hexagonal mesostructured templated silicas were produced in less than 10 minutes using an ultra-fast microwave assisted hydrothermal synthesis. Typically, 10 g can be prepared at once in a commercial microwave device usually devoted to analytical digestion. Undesired alcohol side-products were avoided using inexpensive water colloidal silica instead of silicon alkoxides as the silicon source. In comparison with classical heating activation, the absence of pore expansion and pore wall thickening even for synthesis temperatures as high as 190 °C evidenced that heat transfer and diffusion of matter had no time to take place. Comparison between the chemically extracted and calcined samples shows that the structure was better stabilized for autoclaving above 150 °C. However, a fast temperature ramping and final temperatures above 180 °C were required to sear structures of the highest quality comparable to that of the best conventional methods. This is rationalized by assuming a sequential flake-by-flake assembly of the pore-wall at the micelle palisade. Notably, tosylate counterions yielded better structural characteristics than bromide counterions and allowed better opportunities for surfactant recycling.
Citation:
Chaignon J, Bouizi Y, Davin L, Calin N, Albela B, et al. (2015) Minute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silica. Green Chem 17: 3130–3140. Available: http://dx.doi.org/10.1039/c5gc00038f.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Green Chem.
Issue Date:
2015
DOI:
10.1039/c5gc00038f
Type:
Article
ISSN:
1463-9262; 1463-9270
Sponsors:
The authors thank the KAUST funding grant. J. C. thanks the French "Ministere de l'Enseignement, de la Recherche et de la Technologie" (MERT) for a PhD fellowship, and the C-MIRA program of Rhone-Alpes region in France for financial support.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorChaignon, J.en
dc.contributor.authorBouizi, Y.en
dc.contributor.authorDavin, L.en
dc.contributor.authorCalin, N.en
dc.contributor.authorAlbela, B.en
dc.contributor.authorBonneviot, L.en
dc.date.accessioned2016-02-25T13:42:15Zen
dc.date.available2016-02-25T13:42:15Zen
dc.date.issued2015en
dc.identifier.citationChaignon J, Bouizi Y, Davin L, Calin N, Albela B, et al. (2015) Minute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silica. Green Chem 17: 3130–3140. Available: http://dx.doi.org/10.1039/c5gc00038f.en
dc.identifier.issn1463-9262en
dc.identifier.issn1463-9270en
dc.identifier.doi10.1039/c5gc00038fen
dc.identifier.urihttp://hdl.handle.net/10754/598841en
dc.description.abstract© The Royal Society of Chemistry 2015. Hexagonal mesostructured templated silicas were produced in less than 10 minutes using an ultra-fast microwave assisted hydrothermal synthesis. Typically, 10 g can be prepared at once in a commercial microwave device usually devoted to analytical digestion. Undesired alcohol side-products were avoided using inexpensive water colloidal silica instead of silicon alkoxides as the silicon source. In comparison with classical heating activation, the absence of pore expansion and pore wall thickening even for synthesis temperatures as high as 190 °C evidenced that heat transfer and diffusion of matter had no time to take place. Comparison between the chemically extracted and calcined samples shows that the structure was better stabilized for autoclaving above 150 °C. However, a fast temperature ramping and final temperatures above 180 °C were required to sear structures of the highest quality comparable to that of the best conventional methods. This is rationalized by assuming a sequential flake-by-flake assembly of the pore-wall at the micelle palisade. Notably, tosylate counterions yielded better structural characteristics than bromide counterions and allowed better opportunities for surfactant recycling.en
dc.description.sponsorshipThe authors thank the KAUST funding grant. J. C. thanks the French "Ministere de l'Enseignement, de la Recherche et de la Technologie" (MERT) for a PhD fellowship, and the C-MIRA program of Rhone-Alpes region in France for financial support.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleMinute-made and low carbon fingerprint microwave synthesis of high quality templated mesoporous silicaen
dc.typeArticleen
dc.identifier.journalGreen Chem.en
dc.contributor.institutionUniversite de Lyon, Lyon, Franceen
dc.contributor.institutionUniversite de Lorrain, Nancy, Franceen
dc.contributor.institutionUniversity of Strathclyde, Glasgow, United Kingdomen
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