Catalysis of CoO/Al2O3 composite films prepared by micro-arc oxidation

Dong Jie Liu; Bai Ling Jiang; Ya Ming Wang; Zheng Liu; Yan Feng Ge

Catalysis of CoO/Al₂O₃ composite films prepared by micro-arc oxidation

Dong Jie Liu
, Bai Ling Jiang^*
, Ya Ming Wang
, Zheng Liu
, Yan Feng Ge

^*Corresponding author for this work

Xi'an University of Technology
Material Corrosion and Protection Key Laboratory of Sichuan Province
Harbin Institute of Technology

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

1 Scopus citations

Abstract

CoO/Al₂O₃ composite films on the aluminum substrate were prepared by micro-arc oxidation technology with the doping electrolyte. The surface microstructure and phases of the composite films were investigated and analyzed by SEM and XRD, respectively. The formation mechanism of the composite films and the catalytic degradation of methyl orange by CoO/Al₂O₃ composite films were discussed. The results show that micro-arc oxidation films mainly consist of CoO and Al₂O₃ phases, and CoO phase is deposited onto the surface or into the hole of Al₂O₃ ceramic layer. Co(OH)₂ colloid is formed due to the addition of Co(CH₃COO)₂ in alkaline electrolyte, and CoO is formed owing to the decomposition of Co(OH)₂ colloid under the thermal chemical action, this is attributed to the formation of CoO/Al₂O₃ composite films. The degradation rate of methyl orange reaches 96.4% by the catalysis of the CoO/Al₂O₃ composite films for 10 h.

Original language	English
Pages (from-to)	138-142
Number of pages	5
Journal	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
Volume	35
Issue number	2
State	Published - Feb 2014
Externally published	Yes

Keywords

Aluminum substrate
Catalytic wet oxidation
Micro-arc oxidation

Cite this

@article{6311fc4e57bd41a18f1560914a993321,

title = "Catalysis of CoO/Al2O3 composite films prepared by micro-arc oxidation",

abstract = "CoO/Al2O3 composite films on the aluminum substrate were prepared by micro-arc oxidation technology with the doping electrolyte. The surface microstructure and phases of the composite films were investigated and analyzed by SEM and XRD, respectively. The formation mechanism of the composite films and the catalytic degradation of methyl orange by CoO/Al2O3 composite films were discussed. The results show that micro-arc oxidation films mainly consist of CoO and Al2O3 phases, and CoO phase is deposited onto the surface or into the hole of Al2O3 ceramic layer. Co(OH)2 colloid is formed due to the addition of Co(CH3COO)2 in alkaline electrolyte, and CoO is formed owing to the decomposition of Co(OH)2 colloid under the thermal chemical action, this is attributed to the formation of CoO/Al2O3 composite films. The degradation rate of methyl orange reaches 96.4\% by the catalysis of the CoO/Al2O3 composite films for 10 h.",

keywords = "Aluminum substrate, Catalytic wet oxidation, Micro-arc oxidation",

author = "Liu, \{Dong Jie\} and Jiang, \{Bai Ling\} and Wang, \{Ya Ming\} and Zheng Liu and Ge, \{Yan Feng\}",

year = "2014",

month = feb,

language = "英语",

volume = "35",

pages = "138--142",

journal = "Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment",

issn = "1009-6264",

publisher = "Chinese Mechanical Engineering Society",

number = "2",

}

TY - JOUR

T1 - Catalysis of CoO/Al2O3 composite films prepared by micro-arc oxidation

AU - Liu, Dong Jie

AU - Jiang, Bai Ling

AU - Wang, Ya Ming

AU - Liu, Zheng

AU - Ge, Yan Feng

PY - 2014/2

Y1 - 2014/2

N2 - CoO/Al2O3 composite films on the aluminum substrate were prepared by micro-arc oxidation technology with the doping electrolyte. The surface microstructure and phases of the composite films were investigated and analyzed by SEM and XRD, respectively. The formation mechanism of the composite films and the catalytic degradation of methyl orange by CoO/Al2O3 composite films were discussed. The results show that micro-arc oxidation films mainly consist of CoO and Al2O3 phases, and CoO phase is deposited onto the surface or into the hole of Al2O3 ceramic layer. Co(OH)2 colloid is formed due to the addition of Co(CH3COO)2 in alkaline electrolyte, and CoO is formed owing to the decomposition of Co(OH)2 colloid under the thermal chemical action, this is attributed to the formation of CoO/Al2O3 composite films. The degradation rate of methyl orange reaches 96.4% by the catalysis of the CoO/Al2O3 composite films for 10 h.

AB - CoO/Al2O3 composite films on the aluminum substrate were prepared by micro-arc oxidation technology with the doping electrolyte. The surface microstructure and phases of the composite films were investigated and analyzed by SEM and XRD, respectively. The formation mechanism of the composite films and the catalytic degradation of methyl orange by CoO/Al2O3 composite films were discussed. The results show that micro-arc oxidation films mainly consist of CoO and Al2O3 phases, and CoO phase is deposited onto the surface or into the hole of Al2O3 ceramic layer. Co(OH)2 colloid is formed due to the addition of Co(CH3COO)2 in alkaline electrolyte, and CoO is formed owing to the decomposition of Co(OH)2 colloid under the thermal chemical action, this is attributed to the formation of CoO/Al2O3 composite films. The degradation rate of methyl orange reaches 96.4% by the catalysis of the CoO/Al2O3 composite films for 10 h.

KW - Aluminum substrate

KW - Catalytic wet oxidation

KW - Micro-arc oxidation

UR - https://www.scopus.com/pages/publications/84897568834

M3 - 文章

AN - SCOPUS:84897568834

SN - 1009-6264

VL - 35

SP - 138

EP - 142

JO - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

JF - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

IS - 2

ER -

Catalysis of CoO/Al₂O₃ composite films prepared by micro-arc oxidation

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Keywords

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