Title :

Efficient reduction of Cr(VI) under visible light irradiation using CuS nanostructures

Author(s) :

Nezar, Sawsen [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Cherifi, Yacine [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Barras, Alexandre [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Dogheche, El-Hadj [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Saoula, Nadia [Auteur]
Laoufi, Nadia Aϊcha [Auteur]
Roussel, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Szunerits, Sabine [Auteur]
Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Boukherroub, Rabah [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

Arabian Journal of Chemistry

Pages :

215 - 224

Publisher :

Elsevier

Publication date :

2018

ISSN :

1878-5352

English keyword(s) :

CuS nanostructures
Cr(VI)
Photoreduction
Visible light
Lake water

HAL domain(s) :

Chimie/Matériaux
Chimie/Chimie inorganique

English abstract : [en]

Photoreduction of hexavalent chromium, Cr(VI), identified as carcinogenic and mutagenic element, to Cr(III), believed to be an essential element, using copper sulfide nanostructures (CuS NSs) as photocatalyst was investigated ...
Show more >Photoreduction of hexavalent chromium, Cr(VI), identified as carcinogenic and mutagenic element, to Cr(III), believed to be an essential element, using copper sulfide nanostructures (CuS NSs) as photocatalyst was investigated under visible light irradiation (λ > 420 nm). The CuS NSs were synthesized at low temperature using a wet chemical route and fully characterized using various techniques such as scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and UV–vis spectrophotometry. The photocatalytic reduction of Cr(VI) using visible light irradiation was assessed by UV–vis by following the decrease of the characteristic absorbance at ∼352 nm in the presence of CuS NSs. While CuS NSs promoted Cr(VI) full reduction within 60 min, addition of adipic acid or formic acid accelerated significantly the photocatalytic reduction process. Under optimized conditions, CuS NSs rapidly (12 min) reduced Cr(VI) in presence of 0.5 mM adipic acid. Similarly, Cu NSs were found to be efficient for Cr(VI) reduction dissolved in water from a local lake. Stability studies showed that the photocatalyst could be recycled up to four times without any apparent decrease of its catalytic performance.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

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

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520
• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Submission date :

2019-09-25T14:38:00Z
2019-10-22T09:08:48Z
2020-05-05T14:37:39Z