Nano-Structuration of WO3 Nanoleaves by Localized Hydrolysis of an Organometallic Zn Precursor: Application to Photocatalytic NO2 Abatement - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Accéder directement au contenu
Article Dans Une Revue Nanomaterials Année : 2022

Nano-Structuration of WO3 Nanoleaves by Localized Hydrolysis of an Organometallic Zn Precursor: Application to Photocatalytic NO2 Abatement

Résumé

WO3 is a known photocatalytic metal oxide frequently studied for its depollution properties. However, it suffers from a high recombination rate of the photogenerated electron/holes pair that is detrimental to its performance. In this paper, we present a new chemical method to decorate WO3 nanoleaves (NLs) with a complementary metal oxide (ZnWO4) in order to improve the photocatalytic performance of the composite material for the abatement of 400 ppb NO2 under mild UV exposure. Our strategy was to synthesize WO3·2H2O nanoleaves, then, to expose them, in water-free organic solution, to an organometallic precursor of Zn(Cy)2. A structural water molecule from WO3·2H2O spontaneously decomposes Zn(Cy)2 and induces the formation of the ZnO@WO3·H2O nanocomposite. The material was characterized by electronic microscopy (SEM, TEM), TGA, XRD, Raman and solid NMR spectroscopies. A simple thermal treatment under air at 500 °C affords the ZnWO4@WO3 nanocomposite. The resulting material, additionally decorated with 1% wt. Au, presents a remarkable increase (+166%) in the photocatalytic abatement of NO2 under UV compared to the pristine WO3 NLs. This synthesis method paves the way to the versatile preparation of a wide range of MOx@WO3 nanocomposites (MOx = metal oxide).
Fichier principal
Vignette du fichier
Castello Lux_2022.pdf (8.53 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : Domaine public

Dates et versions

hal-03965121 , version 1 (14-02-2023)
hal-03965121 , version 2 (16-10-2023)

Licence

Paternité

Identifiants

Citer

Kevin Castello Lux, Katia Fajerwerg, Julie Hot, Erick Ringot, Alexandra Bertron, et al.. Nano-Structuration of WO3 Nanoleaves by Localized Hydrolysis of an Organometallic Zn Precursor: Application to Photocatalytic NO2 Abatement. Nanomaterials, 2022, 12 (24), pp.4360. ⟨10.3390/nano12244360⟩. ⟨hal-03965121v2⟩
110 Consultations
31 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More