LAboratoire de Spectrochimie Infrarouge et Raman – UMR 8516
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TAR-G-ED: Plasmonic chemistry in micropores

Thermally activated reactivity in the micropores of zeolite films given by controlled energy deposition

Reference: Programme ANR Blanc (SIMI) 8 N° ANR-13-BS08-0002-01
Type of research: Basic research
Project duration: 42 monthes (01/01/2014 – 30/06/2017)

Summary of the project

Photothermal activity in Cu-zeolite filmsThe project TAR-G-ED is concerned with the plasmonic assisted photothermal activation of chemical reactions in molecules confined in the micropores of zeolite thin films containing metallic nanoparticles. The project focuses more specifically on the reactivity of guests molecules of interest for environmental and green fuel chemistry.

Chemical plasmonics is a booming domain of application of photochemistry based on chemical activation via the formation of a hot electron distribution in metal nanostructures following the absorption of photons in resonance with the metal plasmon band. The excess of energy, several electron-volts, initially concentrated in the electrons inside the conduction band, is then dissipated in the picosecond time scale via electron-phonon coupling and phonon-phonon coupling into the metal lattice and its surrounding media.

The core-goal of the project is to investigate the interactions and photoinduced energy transfers between metal nanoparticles and target guest molecules confined in the micropores in order to characterize unusual effects resulting from the extremely small-size of the metal in combination with the confinement in the zeolite framework. It is particularly important to distinguish the role of the different types of couplings between the hot electrons, the vibronic molecular states, the metal phonons, and the zeolite framework, and to determine their respective influence on the reactivity of the hosted molecules.

Objectives and organization of the project
  • Characterize a new approach for the activation of thermochemical reactions in microporous media based on the photoexcitation of metal nanoparticles.
  • Benchmark the efficiency of this photothermal activation approach in the case of dissociation of CO, NO, H2O, CH3OH, and CH3CH2OH in copper-zeolite films.
  • Evaluate the potential use of metal nanoparticles doped zeolite films as photoactivatable nano-reactors compatible with applications to environment chemistry and solar energy conversion.
  • For this aim, the project is based on a multidisciplinary approach combining the skills and expertise of the Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), Laboratoire Catalyse et Spectrochimie (LCS), and Equipe Matériaux Avancés pour la Catalyse et la Santé (MACC) in the following fields:
  • – Porous nanomaterials science and engineering (nanozeolites and thin films)
    – In situ and operando molecular spectroscopy: EPR, NMR, FTIR
    – Theoretical modelling approaches in chemistry
    – Femtochemistry and transient UV-vis and IR spectroscopy
Main expected outcomes

Through a fundamental approach, TAR-G-ED will provide ultimately the first evaluation of using metal-containing zeolite films as efficient, selective and eco-friendly light-driven reactors compatible with environment chemistry and solar energy applications.

Project partners
P1 : Laboratoire de Spectrochimie Infrarouge et Raman (LASIR, UMR8516)
Université de Lille, Sciences et Technologies, Villeneuve d’Ascq
Contact : Vincent De Waele

P2 : Laboratoire Catalyse et Spectrochimie (LCS, UMR 6506)
Ecole Nationale Supérieure d’Ingénieurs de Caen (ENSICAEN), Université de Caen Basse Normandie
Contact : Svetlana Mintova

P3 : Equipe Matériaux Avancés pour la Catalyse et la Santé (MACS,UMR5253)
Institut Charles Gerhardt, Ecole Nationale Supérieure de Chimie de Montpellier
Contact : Tzonka Mineva