ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts - ANR - Agence nationale de la recherche
Article Dans Une Revue Beilstein Journal of Nanotechnology Année : 2017

ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts

Résumé

Alloyed CuInZnxS2+x (ZCIS) quantum dots (QDs) were successfully associated to ZnO nanoparticles by a thermal treatment at 400 °C for 15 min. The ZnO/ZCIS composite was characterized by TEM, SEM, XRD, XPS and UV–vis absorption spectroscopy. ZCIS QDs, with an average diameter of ≈4.5 nm, were found to be homogeneously distributed at the surface of ZnO nanoparticles. ZCIS-sensitized ZnO nanoparticles exhibit a high photocatalytic activity under simulated solar light irradiation for the degradation of Orange II dye (>95% degradation after 180 min of irradiation at an intensity of 5 mW/cm2). The heterojunction built between the ZnO nanoparticle and ZCIS QDs not only extends the light adsorption range by the photocatalyst but also acts to decrease electron/hole recombination. Interestingly, the ZnO/ZCIS composite was found to produce increased amounts of H2O2 and singlet oxygen 1O2 compared to ZnO, suggesting that these reactive oxygen species play a key role in the photodegradation mechanism. The activity of the ZnO/ZCIS composite is retained at over 90% of its original value after ten successive photocatalytic runs, indicating its high stability and its potential for practical photocatalytic applications.
Fichier principal
Vignette du fichier
main.pdf (2.28 Mo) Télécharger le fichier
Origine Publication financée par une institution

Dates et versions

hal-01524295 , version 1 (28-10-2024)

Identifiants

Citer

Florian Donat, Serge Corbel, Halima Alem, Steve Pontvianne, Lavinia Balan, et al.. ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts. Beilstein Journal of Nanotechnology, 2017, 8, pp.1080-1093. ⟨10.3762/bjnano.8.110⟩. ⟨hal-01524295⟩
160 Consultations
0 Téléchargements

Altmetric

Partager

More