Adsorption and aggregation of Fe(III)-hydroxy complexes during the photodegradation of phenol using the iron-added-TiO2 combined system

Mst Shamsun Nahar; Kiyoshi Hasegawa; Shigehiro Kagaya; Shigeyasu Kuroda

doi:10.1016/j.jhazmat.2008.05.046

Adsorption and aggregation of Fe(III)-hydroxy complexes during the photodegradation of phenol using the iron-added-TiO₂ combined system

Mst Shamsun Nahar^*, Kiyoshi Hasegawa, Shigehiro Kagaya, Shigeyasu Kuroda

^*Corresponding author for this work

Applied Chemistry

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

28 Scopus citations

Abstract

The behavior of Fe(III) aquacomplexes in TiO₂ suspensions in the degradation of phenol has been investigated. The most active Fe(OH)²⁺ species adsorbed on the surface of TiO₂ retards the conversion of Fe(OH)²⁺ into oligomers and therefore increases the percentage of Fe(OH)²⁺ with irradiation time, with a consequent enhancement in the catalytic cycle of Fe(III)/Fe(II) and excited charge traps by Fe(III) in the iron-TiO₂ system. The influence of iron addition on TiO₂ was obtained when the regeneration of [Fe(OH)²⁺] remained continuous with irradiation time. In an optimum TiO₂ suspension (0.5 g/L) with the addition of 0.1 mM Fe(III), the measured k_obs values for phenol degradation were enhanced for the higher adsorption of Fe(OH)²⁺ on the reactive surface of TiO₂ at a specified irradiation time.

Original language	English
Pages (from-to)	351-355
Number of pages	5
Journal	Journal of Hazardous Materials
Volume	162
Issue number	1
DOIs	https://doi.org/10.1016/j.jhazmat.2008.05.046
State	Published - 2009/02/15

Keywords

Adsorption
Combined system
Fe(OH)
Photocatalyst
Titanium oxide
UV light

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2008.05.046

Cite this

@article{41380948615b467e8344b60c48504fb6,

title = "Adsorption and aggregation of Fe(III)-hydroxy complexes during the photodegradation of phenol using the iron-added-TiO2 combined system",

abstract = "The behavior of Fe(III) aquacomplexes in TiO2 suspensions in the degradation of phenol has been investigated. The most active Fe(OH)2+ species adsorbed on the surface of TiO2 retards the conversion of Fe(OH)2+ into oligomers and therefore increases the percentage of Fe(OH)2+ with irradiation time, with a consequent enhancement in the catalytic cycle of Fe(III)/Fe(II) and excited charge traps by Fe(III) in the iron-TiO2 system. The influence of iron addition on TiO2 was obtained when the regeneration of [Fe(OH)2+] remained continuous with irradiation time. In an optimum TiO2 suspension (0.5 g/L) with the addition of 0.1 mM Fe(III), the measured kobs values for phenol degradation were enhanced for the higher adsorption of Fe(OH)2+ on the reactive surface of TiO2 at a specified irradiation time.",

keywords = "Adsorption, Combined system, Fe(OH), Photocatalyst, Titanium oxide, UV light",

author = "Nahar, {Mst Shamsun} and Kiyoshi Hasegawa and Shigehiro Kagaya and Shigeyasu Kuroda",

note = "Funding Information: The research was financially supported by a grant-in-aid for Scientific Research (No. 17510063) from the Ministry of Education, Science, Sports and Culture of Japan, which is hereby gratefully acknowledged.",

year = "2009",

month = feb,

day = "15",

doi = "10.1016/j.jhazmat.2008.05.046",

language = "英語",

volume = "162",

pages = "351--355",

journal = "Journal of Hazardous Materials",

issn = "0304-3894",

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T1 - Adsorption and aggregation of Fe(III)-hydroxy complexes during the photodegradation of phenol using the iron-added-TiO2 combined system

AU - Nahar, Mst Shamsun

AU - Hasegawa, Kiyoshi

AU - Kagaya, Shigehiro

AU - Kuroda, Shigeyasu

N1 - Funding Information: The research was financially supported by a grant-in-aid for Scientific Research (No. 17510063) from the Ministry of Education, Science, Sports and Culture of Japan, which is hereby gratefully acknowledged.

PY - 2009/2/15

Y1 - 2009/2/15

N2 - The behavior of Fe(III) aquacomplexes in TiO2 suspensions in the degradation of phenol has been investigated. The most active Fe(OH)2+ species adsorbed on the surface of TiO2 retards the conversion of Fe(OH)2+ into oligomers and therefore increases the percentage of Fe(OH)2+ with irradiation time, with a consequent enhancement in the catalytic cycle of Fe(III)/Fe(II) and excited charge traps by Fe(III) in the iron-TiO2 system. The influence of iron addition on TiO2 was obtained when the regeneration of [Fe(OH)2+] remained continuous with irradiation time. In an optimum TiO2 suspension (0.5 g/L) with the addition of 0.1 mM Fe(III), the measured kobs values for phenol degradation were enhanced for the higher adsorption of Fe(OH)2+ on the reactive surface of TiO2 at a specified irradiation time.

AB - The behavior of Fe(III) aquacomplexes in TiO2 suspensions in the degradation of phenol has been investigated. The most active Fe(OH)2+ species adsorbed on the surface of TiO2 retards the conversion of Fe(OH)2+ into oligomers and therefore increases the percentage of Fe(OH)2+ with irradiation time, with a consequent enhancement in the catalytic cycle of Fe(III)/Fe(II) and excited charge traps by Fe(III) in the iron-TiO2 system. The influence of iron addition on TiO2 was obtained when the regeneration of [Fe(OH)2+] remained continuous with irradiation time. In an optimum TiO2 suspension (0.5 g/L) with the addition of 0.1 mM Fe(III), the measured kobs values for phenol degradation were enhanced for the higher adsorption of Fe(OH)2+ on the reactive surface of TiO2 at a specified irradiation time.

KW - Adsorption

KW - Combined system

KW - Fe(OH)

KW - Photocatalyst

KW - Titanium oxide

KW - UV light

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