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[期刊论文]

Adsorption Dependent Fenton-like Catalysis on Graphene Oxide-Fe3O4 Composite: Electron Transfer Mediated by Target-catalyst Interactions

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author:

Wang, Xiaoming (Wang, Xiaoming.) [1] | Lian, Jinlu (Lian, Jinlu.) [2] | Wang, Yonghao (Wang, Yonghao.) [3] (Scholars:王永好) | Unfold

Indexed by:

SCIE

Abstract:

Recently, the non-radical oxidation routes involved in the Fenton-like systems have received much concern as it is thought to be a highly efficient catalytic process compared to the free radical oxidization which suffers from the quenching effects of the radicals. In this study, an unprecedented non-radical pathway is found in the degradation of phenol with H2O2 used as the oxidant and graphene oxide-Fe3O4 composite (GO@Fe3O4) as the catalyst. The kinetics investigation shows the degradation rate at 318 K is higher than the value calculated according to the arrhenius equation fitting, implying different catalytic process included. In addition, the non-radical route is verified by ESR spectra in which the species of singlet oxygen (O-1(2)) rather than the radical of center dot OH is revealed to be preferentially generated during the activation of H2O2 by GO@Fe3O4. Distinct structural variation could be observed from the XPS and IR spectra of GO@Fe3O4 before and after the phenol adsorption, which indicates the covalent interactions of phenolic hydroxyl to Fe atoms and H-bond to the alcoholic hydroxyl groups of GO. The oxidation of phenol appears to undergo a target adsorption mediated electron transfer pathway, resulting in the apparent increasement of degradation efficiency. The mechanism proposed in this work will shed light on the interpretation of adsorption dependent catalytic Fenton-like degradation.

Keyword:

adsorption dependent electron transfer non-radical route

Community:

  • [ 1 ] [Wang, Xiaoming]Fuzhou Univ, Coll Environm & Safety Engn, Fujian Prov Engn Res Ctr High Value Utilizat Tech, Fuzhou 350108, Peoples R China
  • [ 2 ] [Lian, Jinlu]Fuzhou Univ, Coll Environm & Safety Engn, Fujian Prov Engn Res Ctr High Value Utilizat Tech, Fuzhou 350108, Peoples R China
  • [ 3 ] [Wang, Yonghao]Fuzhou Univ, Coll Environm & Safety Engn, Fujian Prov Engn Res Ctr High Value Utilizat Tech, Fuzhou 350108, Peoples R China
  • [ 4 ] [Zhang, Xinying]Fuzhou Univ, Coll Environm & Safety Engn, Fujian Prov Engn Res Ctr High Value Utilizat Tech, Fuzhou 350108, Peoples R China
  • [ 5 ] [Wang, Yongjing]Fuzhou Univ, Coll Environm & Safety Engn, Fujian Prov Engn Res Ctr High Value Utilizat Tech, Fuzhou 350108, Peoples R China
  • [ 6 ] [Liu, Weizhen]Guangdong Prov Key Lab Solid Wastes Pollut Contro, Guangzhou, Guangdong, Peoples R China

Reprint 's Address:

  • 王永净

    [Wang, Yongjing]Fuzhou Univ, Coll Environm & Safety Engn, Fujian Prov Engn Res Ctr High Value Utilizat Tech, Fuzhou 350108, Peoples R China

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Source :

SURFACES AND INTERFACES

ISSN: 2468-0230

Year: 2022

Volume: 29

6 . 2

JCR@2022

5 . 7 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:91

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 8

30 Days PV: 2

Online/Total:26/10080530
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