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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

2018 Impact Factor: 3.883

Front. Environ. Sci. Eng.    2018, Vol. 12 Issue (6) : 10    https://doi.org/10.1007/s11783-018-1060-9
RESEARCH ARTICLE
Enhanced heterogeneous Fenton-like activity by Cu-doped BiFeO3 perovskite for degradation of organic pollutants
Jie Mao, Xie Quan(), Jing Wang, Cong Gao, Shuo Chen, Hongtao Yu, Yaobin Zhang
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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Abstract

OH played a key role in heterogeneous Fenton-like catalytic oxidation of organic pollutants.

Doping Cu into BiFeO3 promoted the generation of Fe2+ and then facilitated the effective formation of •OH.

Cu-doped BiFeO3 exhibited higher catalytic performance for phenol degradation than non-doped BiFeO3.

Heterogeneous Fenton-like reaction has been extensively investigated to eliminate refractory organic contaminants in wastewater, but it usually shows low catalytic performance due to difficulty in reduction from Fe(III) to Fe(II). In this study, enhanced catalytic efficiency was obtained by employing Cu-doped BiFeO3 as heterogeneous Fenton-like catalysts, which exhibited higher catalytic performance toward the activation of H2O2 for phenol degradation than un-doped BiFeO3. BiFe0.8Cu0.2O3 displayed the best performance, which yielded 91% removal of phenol (10 mg L1) in 120 min. The pseudo first-order kinetic rate constant of phenol degradation in BiFe0.8Cu0.2O3 catalyzed heterogeneous Fenton-like reaction was 5 times higher than those of traditional heterogeneous Fenton-like catalysts, such as Fe3O4 and goethite. The phenol degradation efficiency could still reach 83% after 4 cycles, which implied the good stability of BiFe0.8Cu0.2O3. The high catalytic activity of BiFe0.8Cu0.2O3 was attributed to the fact that the doping Cu into BiFeO3 could promote the generation of Fe(II) in the catalyst and then facilitate the activation of H2O2 to degrade the organic pollutants.

Keywords Cu doped BiFeO3      Heterogeneous Fenton-like catalysts      Oxidative degradation     
Corresponding Author(s): Xie Quan   
Issue Date: 19 August 2018
 Cite this article:   
Jie Mao,Xie Quan,Jing Wang, et al. Enhanced heterogeneous Fenton-like activity by Cu-doped BiFeO3 perovskite for degradation of organic pollutants[J]. Front. Environ. Sci. Eng., 2018, 12(6): 10.
 URL:  
https://academic.hep.com.cn/fese/EN/10.1007/s11783-018-1060-9
https://academic.hep.com.cn/fese/EN/Y2018/V12/I6/10
Fig.1  (a) XRD patterns of BFO and Cu-doped BFO. The enlarged XRD patterns at binding energies near 39° and 56°; (b) Nitrogen adsorption-desorption isotherms
Fig.2  (a) SEM images of BFO, (b) BiFe0.8Cu0.2O3
Fig.3  (a) Phenol removal on different Cu-doped BFO and (b) The pseudo-first-order kinetic constants of phenol degradation by Cu-doped BFO ([phenol] = 10 mg/L, initial pH= 4.0, [catalysts] = 0.5 g/L, [H2O2] = 10 mM)
Fig.4  (a) Effect of H2O2 on phenol degradation in BiFe0.8Cu0.2O3-H2O2 system ([phenol] = 10 mg/L, initial pH= 4.0, [catalysts] = 0.5 g/L), (b) Effect of catalyst load on phenol degradation in BiFe0.8Cu0.2O3-H2O2 system ([phenol] = 10 mg/L, initial pH= 4.0, [H2O2] = 15 mM) and (c) Effect of initial pH on phenol degradation in BiFe0.8Cu0.2O3-H2O2 system ([phenol] = 10 mg/L, [catalysts] = 0.5 g/L, [H2O2] = 15 mM)
Fig.5  (a) The phenol removal on different catalysts, (b) the removal of different contaminants in BiFe0.8Cu0.2O3-H2O2 system ([pollutants] = 10 mg/L, [catalyst] = 0.5 g/L, [H2O2] = 15 mM, pH= 4.0), (c) The kinetic rates of phenol degradation by different catalysts and (d) TOC removal of phenol ([phenol] = 10 mg/L, [BiFe0.8Cu0.2O3] = 0.5 g/L, pH= 4.0, [H2O2] = 15 mM)
Fig.6  The phenol degradation over successive cycles ([phenol] = 10 mg/L, [catalyst] = 0.5 g/L, [H2O2] = 15 mM, pH= 4.0)
Fig.7  (a) BMPO spin-trapping EPR spectra of •OH radicals in BiFe0.8Cu0.2O3-H2O2 system and (b) Radical quenching experiment with TBA in BiFe0.8Cu0.2O3-H2O2 system
Fig.8  (a) Fe 2p lines of fresh of BFO, (b) fresh of BiFe0.8Cu0.2O3, (c) used of BFO and (d) used of BiFe0.8Cu0.2O3
Fig.9  (a) Cu 2p lines of fresh of BiFe0.8Cu0.2O3 and 9(b) used of BiFe0.8Cu0.2O3.
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[1] FSE-18028-OF-MJ_suppl_1 Download
[1] Hang Zhang, Shuo Chen, Haiguang Zhang, Xinfei Fan, Cong Gao, Hongtao Yu, Xie Quan. Carbon nanotubes-incorporated MIL-88B-Fe as highly efficient Fenton-like catalyst for degradation of organic pollutants[J]. Front. Environ. Sci. Eng., 2019, 13(2): 18-.
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