Synthesis of Core/Shell ZnO/rGO Nanoparticles by Calcination of ZIF-8/rGO Composites and Their Photocatalytic Activity - Archive ouverte HAL
Article Dans Une Revue ACS Omega Année : 2017

Synthesis of Core/Shell ZnO/rGO Nanoparticles by Calcination of ZIF-8/rGO Composites and Their Photocatalytic Activity

Résumé

A facile two-step method was developed to prepare core/shell ZnO/rGO particles from ZIF-8/rGO composites. ZIF-8 particles were first grown at the surface of rGO sheets. Next, ZIF-8 particles were transformed into ZnO particles by thermal decomposition under air at 500 °C. All materials were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, and Brunauer−Emmett−Teller analyses. Results obtained show that ZIF-8 particles strongly associate with rGO sheets and that the calcination of this material produces porous core/shell ZnO/rGO particles with an average diameter of ca. 40 nm. The wt % of rGO associated with ZIF-8 particles was varied from 5 to 20%. The ZnO/rGO (10%) particles exhibit the highest photocatalytic activity for the degradation of the Orange II dye under simulated solar light irradiation of weak intensity (5 mW/cm2). This high photocatalytic activity was demonstrated to originate from superoxide O2•− radicals due to the efficient trapping of photogenerated electrons in ZnO by rGO.

Domaines

Matériaux Chimie
Fichier principal
Vignette du fichier
main.pdf (6.19 Mo) Télécharger le fichier
Origine Publication financée par une institution

Dates et versions

hal-01577204 , version 1 (28-10-2024)

Licence

Identifiants

Citer

Batukhan Tatykayev, Florian Donat, Halima Alem, Lavinia Balan, Ghouti Medjahdid, et al.. Synthesis of Core/Shell ZnO/rGO Nanoparticles by Calcination of ZIF-8/rGO Composites and Their Photocatalytic Activity. ACS Omega, 2017, 2, pp.4946-4954. ⟨10.1021/acsomega.7b00673⟩. ⟨hal-01577204⟩
269 Consultations
0 Téléchargements

Altmetric

Partager

More