Open AccessHigh photocatalytic and photo‐Fenton‐like activities of ZnO–reduced graphene oxide nanocomposites in the degradation of malachite green in water
Author(s) -
He H.Y.,
Fei J.,
Lu J.
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2014.0551
Subject(s) - malachite green , degradation (telecommunications) , graphene , nanocomposite , photocatalysis , photodegradation , oxide , chemical engineering , materials science , chemistry , nuclear chemistry , nanotechnology , catalysis , metallurgy , organic chemistry , adsorption , telecommunications , computer science , engineering
ZnO–reduced graphene oxide (rGO) nanocomposites with rGO/ZnO mass ratio of 0–0.20 were synthesised by a hydrothermal method. The photodegradation experiments of malachite green in water on the nanocomposites indicated that the photodegradation rate increased with increasing rGO content and initial solution pH. Significantly, the Fenton‐like photodegradation of the malachite green in water was observed in the presence of H 2 O 2 . This Fenton‐like reaction speeds up as the rGO/ZnO ratio increases. The quasi‐kinetic rate constants of the photocatalysis systems are in the range of ∼0.0064–0.0247 min −1 and increase about one magnitude to ∼0.0868–0.2120 min −1 by the Fenton‐like reaction.