A combined technique of photo-doping and MOCVD for the development of heterogeneous photo-Fenton catalyst

Frank Leung Yuk Lam; Xijun Hu; Ming Hung Thomas Lee; Kwong Yu Chan

doi:10.1016/j.seppur.2009.03.010

A combined technique of photo-doping and MOCVD for the development of heterogeneous photo-Fenton catalyst

Frank Leung Yuk Lam, Xijun Hu, Ming Hung Thomas Lee, Kwong Yu Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

9 Citations (Scopus)

Abstract

A novel technique combining photo-doping and metal-organic chemical vapor deposition (MOCVD) is used to synthesize heterogeneous iron (Fe) catalyst supported on TiO2/SiO2substrate. The TiO2/SiO2substrate is obtained through MOCVD method to disperse TiO2onto silica gel and then iron is coated onto the substrate by photo-doping. The developed catalyst, Fe/TiO2/SiO2, is characterized by various techniques, including ICP-OES, XRD, XPS, and physisorption. It is found that the doped ferric ion is selectively deposited on the TiO2layer of the catalyst surface without any significant change of the BET specific surface area. XPS spectrum further proves that the doped iron is in trivalent form and mainly distributed on the catalyst surface. The developed catalysts are evaluated in the photo-Fenton degradation on a dye pollutant, Orange II. Complete discoloration and 80% of mineralization can be achieved. A calcination step is required after the photo-doping in order to minimize the iron leaching during the photo-Fenton reaction.

Original language	English
Pages (from-to)	233-237
Number of pages	5
Journal	Separation and Purification Technology
Volume	67
Issue number	2
DOIs	https://doi.org/10.1016/j.seppur.2009.03.010
Publication status	Published - 2 Jun 2009

Keywords

Composites
Environment
Photo-Fenton catalysts
Porous media
Remediation

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

More information

10.1016/j.seppur.2009.03.010

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title = "A combined technique of photo-doping and MOCVD for the development of heterogeneous photo-Fenton catalyst",

abstract = "A novel technique combining photo-doping and metal-organic chemical vapor deposition (MOCVD) is used to synthesize heterogeneous iron (Fe) catalyst supported on TiO2/SiO2substrate. The TiO2/SiO2substrate is obtained through MOCVD method to disperse TiO2onto silica gel and then iron is coated onto the substrate by photo-doping. The developed catalyst, Fe/TiO2/SiO2, is characterized by various techniques, including ICP-OES, XRD, XPS, and physisorption. It is found that the doped ferric ion is selectively deposited on the TiO2layer of the catalyst surface without any significant change of the BET specific surface area. XPS spectrum further proves that the doped iron is in trivalent form and mainly distributed on the catalyst surface. The developed catalysts are evaluated in the photo-Fenton degradation on a dye pollutant, Orange II. Complete discoloration and 80% of mineralization can be achieved. A calcination step is required after the photo-doping in order to minimize the iron leaching during the photo-Fenton reaction.",

keywords = "Composites, Environment, Photo-Fenton catalysts, Porous media, Remediation",

author = "Lam, {Frank Leung Yuk} and Xijun Hu and Lee, {Ming Hung Thomas} and Chan, {Kwong Yu}",

year = "2009",

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AU - Lam, Frank Leung Yuk

AU - Hu, Xijun

AU - Lee, Ming Hung Thomas

AU - Chan, Kwong Yu

PY - 2009/6/2

Y1 - 2009/6/2

N2 - A novel technique combining photo-doping and metal-organic chemical vapor deposition (MOCVD) is used to synthesize heterogeneous iron (Fe) catalyst supported on TiO2/SiO2substrate. The TiO2/SiO2substrate is obtained through MOCVD method to disperse TiO2onto silica gel and then iron is coated onto the substrate by photo-doping. The developed catalyst, Fe/TiO2/SiO2, is characterized by various techniques, including ICP-OES, XRD, XPS, and physisorption. It is found that the doped ferric ion is selectively deposited on the TiO2layer of the catalyst surface without any significant change of the BET specific surface area. XPS spectrum further proves that the doped iron is in trivalent form and mainly distributed on the catalyst surface. The developed catalysts are evaluated in the photo-Fenton degradation on a dye pollutant, Orange II. Complete discoloration and 80% of mineralization can be achieved. A calcination step is required after the photo-doping in order to minimize the iron leaching during the photo-Fenton reaction.

AB - A novel technique combining photo-doping and metal-organic chemical vapor deposition (MOCVD) is used to synthesize heterogeneous iron (Fe) catalyst supported on TiO2/SiO2substrate. The TiO2/SiO2substrate is obtained through MOCVD method to disperse TiO2onto silica gel and then iron is coated onto the substrate by photo-doping. The developed catalyst, Fe/TiO2/SiO2, is characterized by various techniques, including ICP-OES, XRD, XPS, and physisorption. It is found that the doped ferric ion is selectively deposited on the TiO2layer of the catalyst surface without any significant change of the BET specific surface area. XPS spectrum further proves that the doped iron is in trivalent form and mainly distributed on the catalyst surface. The developed catalysts are evaluated in the photo-Fenton degradation on a dye pollutant, Orange II. Complete discoloration and 80% of mineralization can be achieved. A calcination step is required after the photo-doping in order to minimize the iron leaching during the photo-Fenton reaction.

KW - Composites

KW - Environment

KW - Photo-Fenton catalysts

KW - Porous media

KW - Remediation

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DO - 10.1016/j.seppur.2009.03.010

M3 - Journal article

SN - 1383-5866

VL - 67

SP - 233

EP - 237

JO - Separation and Purification Technology

JF - Separation and Purification Technology

IS - 2

ER -

A combined technique of photo-doping and MOCVD for the development of heterogeneous photo-Fenton catalyst

Abstract

Keywords

ASJC Scopus subject areas

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