Mesoporous colloidal silica cubes with catalytically active cores

Alessio J. Sprockel (Corresponding author), Frans Dekker, Remco Tuinier, Albert P. Philipse

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Samenvatting

Preparation methods of cubic core-shell particles with specific functionality are limited. Here we demonstrate the possibility to transform cuprous oxide cubes coated with mesoporous silica into functional core-shell particles, while retaining their cubic shape. Cuprous oxide nanocubes are coated with mesoporous silica using cetyltrimethylammonium bromide as a template, after which the cuprous oxide core is transformed using liquid phase calcination and galvanic replacement. Nitrogen physisorption and electron microscopy confirm that mesoporous silica coatings are obtained with tuneable thickness. The successful transformation of cuprous oxide into gold and silver is assessed via UV–VIS spectroscopy and energy dispersive X-ray spectroscopy. Particles with a silver core and a cubic mesoporous silica shell are demonstrated to be catalytically active in the degradation of the dye Congo red. Graphical abstract: [Figure not available: see fulltext.]

Originele taal-2Engels
Pagina's (van-tot)1965-1974
Aantal pagina's10
TijdschriftJournal of Porous Materials
Volume30
Nummer van het tijdschrift6
DOI's
StatusGepubliceerd - dec. 2023

Bibliografische nota

Funding Information:
Remco Dalebout is thanked for the measurement of, and useful discussions on, the adsorption isotherms. Hans Meeldijk is thanked for the HAADF and EDX images. This project was funded by TTW (Toegepaste en Technische Wetenschappen) under project number 14210. Dr. Leon Bremer (DSM, now Nanoscolo), Dr. Damien Reardon (DSM, now Covestro), Dr. Filip Oosterlinck (DSM) and Dr. Jurgen Scheerder (DSM, now Covestro) from the Colloidal Mosaics project User Committee are thanked for helpful discussions. NWO-TTW (Nederlandse Organisatie voor Wetenschappelijk Onderzoek - Toegepaste en Technische Wetenschappen) is acknowledged for financial support.

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