Titre :

Cyclodextrins as Versatile Tools for the Preparation of UV- and Visible-light Responsive Mesoporous Photocatalysts

Auteur(s) :

Bleta, Rudina [Auteur]
UCCS Équipe Catalyse Supramoléculaire
Machut, Cécile [Auteur]
UCCS Équipe Catalyse Supramoléculaire
Ponchel, Anne [Auteur]
UCCS Équipe Catalyse Supramoléculaire
Monflier, Eric [Auteur]
UCCS Équipe Catalyse Supramoléculaire

Titre de la manifestation scientifique :

9th World Congress on Green Chemistry & Technology

Ville :

Amsterdam

Pays :

Pays-Bas

Date de début de la manifestation scientifique :

2018

Date de publication :

2018

Discipline(s) HAL :

Chimie

Résumé en anglais : [en]

The development of sustainable chemical processes is becoming a major feature of research for the protection of human health and the environment. In this context, the heterogeneous photocatalysis, using semiconductor-liquid ...
Lire la suite >The development of sustainable chemical processes is becoming a major feature of research for the protection of human health and the environment. In this context, the heterogeneous photocatalysis, using semiconductor-liquid interfaces as catalytic sites for solar light-stimulated redox reactions, has emerged as a promising technology for environmental clean-up applications. Among the various metal oxide semiconductors, titanium dioxide (TiO2) has become one of the most important photocatalysts because of its chemical stability and unique ability in catalyzing water splitting, air purification and water decontamination. For effective solar energy utilization, modification of TiO2 surface with noble metal nanoparticles provides an alternative approach for extending the absorption wavelength from the ultraviolet (UV) to the visible region. In this context, Au/TiO2 composites have attracted much interest as efficient plasmonic photocatalysts owing to the ability of Au nanoparticles to absorb light in the visible region and TiO2 to efficiently separate the photogenerated electrons and holes at the metal-semiconductor interface. In this work, we describe a simple colloidal self-assembly approach towards highly active UV- and visible-light photocatalysts that takes advantage of the ability of cyclodextrins to direct the self-assembly of TiO2 colloids in a porous network over which Au nanoparticles can be uniformly dispersed. The performance of these nanocomposites is evaluated in the visible light photocatalytic degradation of the phenoxyacetic acid (PAA), a widely utilized herbicide, frequently detected in natural water. The CD-driven approach is simple and provides a versatile route towards a broad range of nanostructured composites with promising properties for environmental clean-up applications.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Catalyse et chimie supramoléculaire (CASU)

Date de dépôt :

2022-03-08T13:48:19Z
2023-11-29T08:05:31Z