A new magnetic nano zero-valent iron encapsulated in carbon spheres for oxidative degradation of phenol

Yuxian Wang; Hongqi Sun; Xiaoguang Duan; Ha Ming Ang; Moses O. Tadé; Shaobin Wang

doi:10.1016/j.apcatb.2015.02.016

A new magnetic nano zero-valent iron encapsulated in carbon spheres for oxidative degradation of phenol

Yuxian Wang
, Hongqi Sun
, Xiaoguang Duan
, Ha Ming Ang
, Moses O. Tadé
, Shaobin Wang

Research output: Contribution to journal › Article › peer-review

272 Citations (Scopus)

Abstract

In this study, magnetic carbon encapsulated nano iron hybrids (nano Fe⁰/Fe₃C@CS) were synthesized via a novel one-pot hydrothermal method followed by self-reduction in N₂ atmosphere. The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), N₂ sorption isotherms and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC). Catalytic performance of the as-synthesized nanoparticles was tested in activation of oxone® for phenol degradation in aqueous solutions. Superior catalytic performance was observed by complete removal of 20ppm phenol within 10min. The formation of Fe₃C was found to contribute to a better stability and magnetic separation of Fe⁰/Fe₃C@CS in its repeated uses. Both electron paramagnetic resonance (EPR) and classic quenching tests were carried out to investigate the mechanism of radical generation and evolution in phenol oxidation. Different from Co- and Mn-based catalysts in generation of sulfate radicals, Fe⁰/Fe₃C@CS selectively induced hydroxyl radicals for phenol degradation.

Original language	English
Pages (from-to)	73-81
Number of pages	9
Journal	Applied Catalysis B: Environmental
Volume	172-173
DOIs	https://doi.org/10.1016/j.apcatb.2015.02.016
Publication status	Published - 1 Aug 2015
Externally published	Yes

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10.1016/j.apcatb.2015.02.016

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title = "A new magnetic nano zero-valent iron encapsulated in carbon spheres for oxidative degradation of phenol",

abstract = "In this study, magnetic carbon encapsulated nano iron hybrids (nano Fe0/Fe3C@CS) were synthesized via a novel one-pot hydrothermal method followed by self-reduction in N2 atmosphere. The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), N2 sorption isotherms and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC). Catalytic performance of the as-synthesized nanoparticles was tested in activation of oxone{\textregistered} for phenol degradation in aqueous solutions. Superior catalytic performance was observed by complete removal of 20ppm phenol within 10min. The formation of Fe3C was found to contribute to a better stability and magnetic separation of Fe0/Fe3C@CS in its repeated uses. Both electron paramagnetic resonance (EPR) and classic quenching tests were carried out to investigate the mechanism of radical generation and evolution in phenol oxidation. Different from Co- and Mn-based catalysts in generation of sulfate radicals, Fe0/Fe3C@CS selectively induced hydroxyl radicals for phenol degradation.",

keywords = "Carbon nanosphere, Catalytic oxidation, Magnetic nanoparticle, Phenol, Zero-valent iron",

author = "Yuxian Wang and Hongqi Sun and Xiaoguang Duan and Ang, \{Ha Ming\} and Tad{\'e}, \{Moses O.\} and Shaobin Wang",

note = "Funding Information: The authors acknowledge the use of equipment, scientific and technical assistance of the Curtin University Electron Microscope Facility and Centre for Microscopy Characterization, which has been partially funded by the University, State and Commonwealth Governments. H.S. is grateful for the supports of Curtin Research Fellowship and Opening Project (KL13-02) of State Key Laboratory of Materials-Oriented Chemical Engineering, China. Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = aug,

day = "1",

doi = "10.1016/j.apcatb.2015.02.016",

language = "English",

volume = "172-173",

pages = "73--81",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

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TY - JOUR

T1 - A new magnetic nano zero-valent iron encapsulated in carbon spheres for oxidative degradation of phenol

AU - Wang, Yuxian

AU - Sun, Hongqi

AU - Duan, Xiaoguang

AU - Ang, Ha Ming

AU - Tadé, Moses O.

AU - Wang, Shaobin

N1 - Funding Information: The authors acknowledge the use of equipment, scientific and technical assistance of the Curtin University Electron Microscope Facility and Centre for Microscopy Characterization, which has been partially funded by the University, State and Commonwealth Governments. H.S. is grateful for the supports of Curtin Research Fellowship and Opening Project (KL13-02) of State Key Laboratory of Materials-Oriented Chemical Engineering, China. Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/8/1

Y1 - 2015/8/1

N2 - In this study, magnetic carbon encapsulated nano iron hybrids (nano Fe0/Fe3C@CS) were synthesized via a novel one-pot hydrothermal method followed by self-reduction in N2 atmosphere. The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), N2 sorption isotherms and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC). Catalytic performance of the as-synthesized nanoparticles was tested in activation of oxone® for phenol degradation in aqueous solutions. Superior catalytic performance was observed by complete removal of 20ppm phenol within 10min. The formation of Fe3C was found to contribute to a better stability and magnetic separation of Fe0/Fe3C@CS in its repeated uses. Both electron paramagnetic resonance (EPR) and classic quenching tests were carried out to investigate the mechanism of radical generation and evolution in phenol oxidation. Different from Co- and Mn-based catalysts in generation of sulfate radicals, Fe0/Fe3C@CS selectively induced hydroxyl radicals for phenol degradation.

AB - In this study, magnetic carbon encapsulated nano iron hybrids (nano Fe0/Fe3C@CS) were synthesized via a novel one-pot hydrothermal method followed by self-reduction in N2 atmosphere. The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), N2 sorption isotherms and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC). Catalytic performance of the as-synthesized nanoparticles was tested in activation of oxone® for phenol degradation in aqueous solutions. Superior catalytic performance was observed by complete removal of 20ppm phenol within 10min. The formation of Fe3C was found to contribute to a better stability and magnetic separation of Fe0/Fe3C@CS in its repeated uses. Both electron paramagnetic resonance (EPR) and classic quenching tests were carried out to investigate the mechanism of radical generation and evolution in phenol oxidation. Different from Co- and Mn-based catalysts in generation of sulfate radicals, Fe0/Fe3C@CS selectively induced hydroxyl radicals for phenol degradation.

KW - Carbon nanosphere

KW - Catalytic oxidation

KW - Magnetic nanoparticle

KW - Phenol

KW - Zero-valent iron

UR - https://www.scopus.com/pages/publications/84923305955

U2 - 10.1016/j.apcatb.2015.02.016

DO - 10.1016/j.apcatb.2015.02.016

M3 - Article

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SN - 0926-3373

VL - 172-173

SP - 73

EP - 81

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

A new magnetic nano zero-valent iron encapsulated in carbon spheres for oxidative degradation of phenol

Abstract

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