Elaboration de photocatalyseurs schéma-Z de structure photonique pour l'énergie et l'environnement

par Cong Wang

Projet de thèse en Chimie

Sous la direction de Hynd Remita bosi.

Thèses en préparation à université Paris-Saclay , dans le cadre de École doctorale Sciences chimiques : molécules, matériaux, instrumentation et biosystèmes , en partenariat avec Institut de Chimie Physique (laboratoire) et de Faculté des sciences d'Orsay (référent) depuis le 01-10-2018 .


  • Résumé

    Solar light is a green and renewable source of energy that has been used for either water depollution or hydrogen production. Both are interconnected, somehow, by photocatalys as a common general operating mechanism. The main challenge of the PhD project will be the design of bioinspired Z-scheme photocatalyst with a photonic structure. The Z-scheme photocatalys design appears as a promising strategy to mimic nature (leafs-bioinspired) for hydrogen production and depollution applications. The strategy will combine soft chemistry (sol-gel chemistry) and biotemplate nanomaterial (NanoCrystalline Cellulose; NCCs) for one-pot generation of Z-scheme photocatalyst with a photonic mesoporous structure which enable to improve the light harvesting. A strict control of the synthetic conditions, (kinetics of polymerisation, solvent evaporation and the ratio between inorganic precursor and CNCs, etc.) would lead to a mesoporous photonic structure wi th adjustable photonic gap. The inorganic part of the Z-scheme photocatalyst will be composed of an heteronanostructure: two semiconductors with variable band-gap energy (two photons absorption) and metallic nanoparticles with a localized surface plasmonic resonance. Each part will be designed finely to get a significant improvement of the photocatalytic efficiency. This multidisciplinary project will be done in close collaboration with scientists who have a strong expertise in physical chemistry, photocatalysis, material chemistry, soft chemistry and soft matter physics.

  • Titre traduit

    Design of Z-scheme photocatalyst with a photonic structure for energy and environmental applications


  • Résumé

    Solar light is a green and renewable source of energy that has been used for either water depollution or hydrogen production. Both are interconnected, somehow, by photocatalys as a common general operating mechanism. The main challenge of the PhD project will be the design of bioinspired Z-scheme photocatalyst with a photonic structure. The Z-scheme photocatalys design appears as a promising strategy to mimic nature (leafs-bioinspired) for hydrogen production and depollution applications. The strategy will combine soft chemistry (sol-gel chemistry) and biotemplate nanomaterial (NanoCrystalline Cellulose; NCCs) for one-pot generation of Z-scheme photocatalyst with a photonic mesoporous structure which enable to improve the light harvesting. A strict control of the synthetic conditions, (kinetics of polymerisation, solvent evaporation and the ratio between inorganic precursor and CNCs, etc.) would lead to a mesoporous photonic structure wi th adjustable photonic gap. The inorganic part of the Z-scheme photocatalyst will be composed of an heteronanostructure: two semiconductors with variable band-gap energy (two photons absorption) and metallic nanoparticles with a localized surface plasmonic resonance. Each part will be designed finely to get a significant improvement of the photocatalytic efficiency. This multidisciplinary project will be done in close collaboration with scientists who have a strong expertise in physical chemistry, photocatalysis, material chemistry, soft chemistry and soft matter physics.