Oxygen vacancy enhancing the Fe 2 O 3 -CeO 2 catalysts in Fenton-like reaction for the sulfamerazine degradation under O 2 atmosphere

To develop an efficient and reusable heterogeneous Fenton-like catalyst is a great challenge for its application in practical water treatment. Effective oxygen vacancy (OVs)-promoted Fe O -CeO catalyst was prepared by a sol-gel method, and applied in the heterogeneous Fenton-like reaction of the sul...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2019-04, Vol.228, p.521
Main Authors: Gao, Pan, Chen, Xuanjin, Hao, Mengjie, Xiao, Feng, Yang, Shaoxia
Format: Article
Language:English
Online Access:Get full text
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Summary:To develop an efficient and reusable heterogeneous Fenton-like catalyst is a great challenge for its application in practical water treatment. Effective oxygen vacancy (OVs)-promoted Fe O -CeO catalyst was prepared by a sol-gel method, and applied in the heterogeneous Fenton-like reaction of the sulfamerazine (SMR) degradation. The Fe O -CeO catalyst showed good activity and stability, and total SMR conversion was achieved in the Fenton-like reaction after 75 min at pH 3.0 and 45 °C under O atmosphere. Moreover, the SMR removal was significantly enhanced under O atmosphere. The surface-bounded OH radicals played a dominant role for the SMR degradation. The Fe O -CeO catalyst remarkably promoted the generation of OH in the Fenton-like reaction under O atmosphere, mostly because abundant OVs on the catalyst surface not only accelerated electron transfer to promote the H O decomposition, but also oxygen molecules, adsorbed on OVs, formed O /HO and promoted the Fe /Fe redox cycle.
ISSN:1879-1298