Titre :

Hydrothermal synthesis, phase structure, optical and photocatalytic properties of Zn2SnO4 nanoparticles

Auteur(s) :

Ben Ali, Monaam [Auteur]
Barka-Bouaifel, Fatiha [Auteur]
Elhouichet, Habib [Auteur]
Sieber, Brigitte [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Addad, Ahmed [Auteur]
Boussekey, Luc [Auteur]
Férid, Mokhtar [Auteur]
Boukherroub, Rabah [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Titre de la revue :

Journal of Colloid and Interface Science

Numéro :

457

Pagination :

360-369

Éditeur :

Elsevier

Date de publication :

2015

ISSN :

0021-9797

Mot(s)-clé(s) en anglais :

Zn2SnO4 nanoparticles
Hydrothermal synthesis
Optical properties
Photocatalysis
Visible light
Mechanism

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

Zinc stannate (Zn₂SnO₄ or ZTO) nanoparticles were synthesized via hydrothermal method using NaOH as a mineralizer. X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution ...
Lire la suite >Zinc stannate (Zn₂SnO₄ or ZTO) nanoparticles were synthesized via hydrothermal method using NaOH as a mineralizer. X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) of the synthesized ZTO nanoparticles revealed the formation of highly pure ZTO phase with the spinel-like structure. The nanoparticles have spherical shape with an average size of about 25 nm. The Raman spectrum of the sample was dominated by the A_1g vibration mode of pure ZTO phase. From UV–Vis measurement, a band gap E_<i>g</i> of 3.465 eV was determined. The photocatalytic activity of the ZTO nanoparticles was evaluated for the photodegradation of rhodamine B (RhB) under visible light irradiation. The influence of catalyst concentration and irradiation time on the photocatalytic process was investigated. The ZTO catalyst showed the best photocatalytic performance at a concentration of 0.2 g/L, and the photodecomposition of RhB followed first-order kinetics with a rate constant <i>k<:i> = 0.0249 min⁻¹. The ZTO-assisted photocatalytic degradation of RhB occurred <i>via</i> two competitive processes: a photocatalytic process and a photosensitized process. The detection of hydroxyl radicals by fluorescence measurements suggests that these species play an important role in the photocatalytic process.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
ISEN
Univ. Valenciennes
ENSCL
CNRS
INRA
Institut Catholique Lille
Centrale Lille

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520
• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
• Unité Matériaux et Transformations (UMET) - UMR 8207

Date de dépôt :

2019-05-16T17:04:11Z