DataVXACS Applied Materials & InterfacesPaper
journal article·2020-06-03

Photocatalysis Meets Magnetism: Designing Magnetically Recoverable Supports for Visible-Light Photocatalysis

Julio C. S. Terra, Ariane Desgranges, Cyrille Monnereau, Elena H. Sanchez, Jose A. De Toro, Zacharias Amara, Audrey Moores

ACS Applied Materials & Interfaces· Volume 12· Issue 22
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Source abstract

Abstract

While magnetic supports have been widely used to immobilize homogeneous catalysts in organic chemistry, this strategy has so far found very little application in photocatalysis. Indeed, magnetic supports are dark colored, and thus compete for photon absorption with photocatalysts themselves. We have developed a series of core–shell Fe(0)-silica nanoparticles as supports for immobilizing the photosensitizer Ru(bpy)32+, featuring various silica shell thicknesses—16–34 nm SiO2—on 9 nm Fe cores. The supports and the resulting photocatalytic systems were studied for their magnetic, optical, and catalytic properties in the context of the photooxidation of citronellol, and we found that thicker silica shells lead to higher catalytic activity. We correlated this effect as well as Ru(bpy)32+ fluorescence and singlet oxygen generation to the absorption properties of the supports. We were able to reuse our optimal system three times with minimal loss of activity and achieved turnover numbers largely surpassing the performance of homogeneous Ru(bpy)32+. This work highlights the role of material design in the conception of new supports for applications in heterogeneous photocatalysis.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Nanoplatforms for cancer theranostics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centre for Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada

Ecole Polytechnique, Route de Saclay, 91128 Palaiseau Cedex, France

Laboratoire de Chimie, ENS de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, F-69342 Lyon, France

Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Física Aplicada, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain

Equipe Chimie Moléculaire, Laboratoire de Génomique, Bioinformatique et Chimie Moléculaire, (GBCM), EA 7528, Conservatoire national des arts et métiers, HESAM Université, 2 rue Conté, 75003 Paris Cedex 03, France

Department of Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada

Funding

Canada Foundation for Innovation · McGill University · Fonds de Recherche du Qu?bec - Nature et Technologies · American Chemical Society · Natural Sciences and Engineering Research Council of Canada · Universidad de Castilla - La Mancha · French Conservatoire National des Arts et M?tiers · Embassy of France in Canada · Spanish Ministerio de Econom?a y Competitividad

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