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Strongly Reducing (Diarylamino)benzene-Based Covalent Organic Framework for Metal-Free Visible Light Photocatalytic H(2)O(2) Generation

[Image: see text] Photocatalytic reduction of molecular oxygen is a promising route toward sustainable production of hydrogen peroxide (H(2)O(2)). This challenging process requires photoactive semiconductors enabling solar energy driven generation and separation of electrons and holes with high char...

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Detalles Bibliográficos
Autores principales: Krishnaraj, Chidharth, Sekhar Jena, Himanshu, Bourda, Laurens, Laemont, Andreas, Pachfule, Pradip, Roeser, Jérôme, Chandran, C. Vinod, Borgmans, Sander, Rogge, Sven M. J., Leus, Karen, Stevens, Christian V., Martens, Johan A., Van Speybroeck, Veronique, Breynaert, Eric, Thomas, Arne, Van Der Voort, Pascal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7705891/
https://www.ncbi.nlm.nih.gov/pubmed/33185433
http://dx.doi.org/10.1021/jacs.0c09684
Descripción
Sumario:[Image: see text] Photocatalytic reduction of molecular oxygen is a promising route toward sustainable production of hydrogen peroxide (H(2)O(2)). This challenging process requires photoactive semiconductors enabling solar energy driven generation and separation of electrons and holes with high charge transfer kinetics. Covalent organic frameworks (COFs) are an emerging class of photoactive semiconductors, tunable at a molecular level for high charge carrier generation and transfer. Herein, we report two newly designed two-dimensional COFs based on a (diarylamino)benzene linker that form a Kagome (kgm) lattice and show strong visible light absorption. Their high crystallinity and large surface areas (up to 1165 m(2)·g(–1)) allow efficient charge transfer and diffusion. The diarylamine (donor) unit promotes strong reduction properties, enabling these COFs to efficiently reduce oxygen to form H(2)O(2). Overall, the use of a metal-free, recyclable photocatalytic system allows efficient photocatalytic solar transformations.