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Stable surface functionalization of carbonized mesoporous silicon

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Abstract

Mesoporous silicon (PSi) is an emerging nanomaterial studied in e.g. biomedical, sensor and energy applications. In many applications, a major obstacle in its commercial use is the instability of its surfaces, especially when functionalized with organic molecules. In the present work, we introduce a surface functionalization method for PSi, in which carbonized surface of silicon is functionalized with terminal alkenes. A good surface coverage of 0.3 molecules per nm2 was achieved and the material showed excellent aqueous stability at low and neutral pH. It also withstood a highly basic solution for several days. The developed method was used to graft bisphosphonates on the surface and the material was used for metal adsorption. Because of its excellent stability, the adsorbent material lasted up to 50 adsorption/desorption cycles without a significant deterioration of its performance.

Graphical abstract: Stable surface functionalization of carbonized mesoporous silicon

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Publication details

The article was received on 04 Sep 2019, accepted on 22 Nov 2019 and first published on 22 Nov 2019


Article type: Research Article
DOI: 10.1039/C9QI01140D
Inorg. Chem. Front., 2020, Advance Article
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    Stable surface functionalization of carbonized mesoporous silicon

    J. Riikonen, T. Nissinen, A. Alanne, R. Thapa, P. Fioux, M. Bonne, S. Rigolet, F. Morlet-Savary, F. Aussenac, C. Marichal, J. Lalevée, J. Vepsäläinen, B. Lebeau and V. Lehto, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/C9QI01140D

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