1. Two‐dimensional photonic metasurfaces for slow light‐controlled photocatalysis
- Author
-
Yves Jourlin, Chantal Guillard, Matthieu Bugnet, Thomas Dursap, Said El-Jallal, Emmanuel Drouard, Jean-Marc Chovelon, Brice Devif, Céline Chevalier, Jérôme Capitolis, Solène Brottet, Corinne Ferronato, Marwa Hamandi, Gilles Berhault, Jose Penuelas, Stéphanie Reynaud, N. Crespo-Monteiro, Jean-Louis Leclercq, Christian Seassal, Eric Puzenat, Hai Son Nguyen, Marion Hochedel, Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Hubert Curien [Saint Etienne] (LHC), Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-École Centrale de Lyon (ECL), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)
- Subjects
Materials science ,02 engineering and technology ,010402 general chemistry ,Slow light ,depollution ,01 natural sciences ,7. Clean energy ,[SPI]Engineering Sciences [physics] ,[CHIM]Chemical Sciences ,TiO2 ,Materials of engineering and construction. Mechanics of materials ,ComputingMilieux_MISCELLANEOUS ,Photonic crystal ,[PHYS]Physics [physics] ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,business.industry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,metasurface ,Photocatalysis ,TA401-492 ,Optoelectronics ,Photonics ,0210 nano-technology ,business ,TiO 2 ,photocatalysis ,photonic crystal - Abstract
International audience; Photocatalysis using semiconductor materials like titania (TiO 2) is a key method for environmental purification or solar fuel generation. Nanostructures that maximize incident light absorption are highly desired to enhance depollution rate or solar-to-fuel conversion efficiency in limited volumes of catalysts. Here, we report on structural and optical properties of metasurfaces based on a 20 nm thick anatase layer conformally deposited onto a wavelength-scale two-dimensional periodic photonic lattice. We investigate the NO degradation using such metasurfaces, and evaluate the impact of the patterning on photocatalytic activities between 340 and 400 nm. In the 380-385 nm range, the mean photochemical efficiency is increased by a factor up to 5.7 compared to flat references, with an overall threefold enhancement within the whole spectral range of interest. This approach can be applied to numerous types of systems by varying active materials, leading to substantial improvements in air/water depollution, water splitting or artificial photosynthesis processes.
- Published
- 2022