High photocatalytic and photo-Fenton-like activities of ZnO–reduced graphene oxide nanocomposites in the degradation of malachite green in water

H.-Y. He; J. Fei; J. Lu

High photocatalytic and photo-Fenton-like activities of ZnO–reduced graphene oxide nanocomposites in the degradation of malachite green in water

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Author(s): H.-Y. He ¹ ; J. Fei ¹ ; J. Lu ¹
- Affiliations: 1: College of Material Science and Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, People's Republic of China
Source: Volume 10, Issue 8, August 2015, p. 389 – 394
DOI: 10.1049/mnl.2014.0551 , Online ISSN 1750-0443

Received 25/09/2014, Accepted 14/05/2015, Revised 14/05/2015, Published 14/08/2015

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 H₂O₂. 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.

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High photocatalytic and photo-Fenton-like activities of ZnO–reduced graphene oxide nanocomposites in the degradation of malachite green in water

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