The role of adsorption in the photocatalytic decomposition of Orange II on carbon-modified TiO2

Shila Jafari, Beata Tryba, Ewelina Kusiak-Nejman, Joanna Kapica-Kozar, Antoni W. Morawski, Mika Sillanpää

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Carbon-modified TiO2was successfully prepared via simple heat treatment of TiO2in alcohol vapors (1-butanol and 2-butanol) at a constant temperature (500 °C). The prepared samples were characterized by means of X-ray diffraction (XRD) and Fourier transform infrared diffuse reflectance spectroscopy (FTIR/DRS). Brunauer-Emmett-Teller (BET) adsorption and zeta potential analyses were also conducted. The Freundlich adsorption model fitted both carbon-modified and original TiO2, which provide a heterogeneous surface for the adsorption of Orange II. The carbon-modified TiO2was used as a photocatalyst to remove Orange II from aqueous solution by combined processes of adsorption and photocatalytic decomposition. The adsorption performance of the carbon-modified TiO2was higher than that of the unmodified TiO2. Carbon adsorption approached synchronicity with oxidation, leading to the higher activity. This enhanced adsorption capacity may be a promising factor for the photocatalytic removal of Orange II onto carbon-modified TiO2. The prepared Carbon-modified TiO2samples had higher BET surface area than unmodified TiO2(44, 54.48 and 49.72 m2/g for TiO2, C1B-TiO2and C2B-TiO2, respectively) and exhibited higher hydrophobicity and a positively charged surface, which were favorable for adsorption of Orange II. High adsorption of dye on the porous structure of C-TiO2enhanced its photocatalytic decomposition under visible light.
Original languageEnglish
Pages (from-to)504-512
Number of pages9
JournalJournal of Molecular Liquids
Volume220
DOIs
Publication statusPublished - 1 Aug 2016
MoE publication typeA1 Journal article-refereed

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Carbon
Decomposition
decomposition
Adsorption
adsorption
carbon
Butenes
2-naphthol orange
1-Butanol
Zeta potential
Hydrophobicity
hydrophobicity
Photocatalysts
Fourier transforms
alcohols
Alcohols
heat treatment
Coloring Agents
Dyes
dyes

Cite this

Jafari, S., Tryba, B., Kusiak-Nejman, E., Kapica-Kozar, J., Morawski, A. W., & Sillanpää, M. (2016). The role of adsorption in the photocatalytic decomposition of Orange II on carbon-modified TiO2. Journal of Molecular Liquids, 220, 504-512. https://doi.org/10.1016/j.molliq.2016.02.014
Jafari, Shila ; Tryba, Beata ; Kusiak-Nejman, Ewelina ; Kapica-Kozar, Joanna ; Morawski, Antoni W. ; Sillanpää, Mika. / The role of adsorption in the photocatalytic decomposition of Orange II on carbon-modified TiO2. In: Journal of Molecular Liquids. 2016 ; Vol. 220. pp. 504-512.
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abstract = "Carbon-modified TiO2was successfully prepared via simple heat treatment of TiO2in alcohol vapors (1-butanol and 2-butanol) at a constant temperature (500 °C). The prepared samples were characterized by means of X-ray diffraction (XRD) and Fourier transform infrared diffuse reflectance spectroscopy (FTIR/DRS). Brunauer-Emmett-Teller (BET) adsorption and zeta potential analyses were also conducted. The Freundlich adsorption model fitted both carbon-modified and original TiO2, which provide a heterogeneous surface for the adsorption of Orange II. The carbon-modified TiO2was used as a photocatalyst to remove Orange II from aqueous solution by combined processes of adsorption and photocatalytic decomposition. The adsorption performance of the carbon-modified TiO2was higher than that of the unmodified TiO2. Carbon adsorption approached synchronicity with oxidation, leading to the higher activity. This enhanced adsorption capacity may be a promising factor for the photocatalytic removal of Orange II onto carbon-modified TiO2. The prepared Carbon-modified TiO2samples had higher BET surface area than unmodified TiO2(44, 54.48 and 49.72 m2/g for TiO2, C1B-TiO2and C2B-TiO2, respectively) and exhibited higher hydrophobicity and a positively charged surface, which were favorable for adsorption of Orange II. High adsorption of dye on the porous structure of C-TiO2enhanced its photocatalytic decomposition under visible light.",
author = "Shila Jafari and Beata Tryba and Ewelina Kusiak-Nejman and Joanna Kapica-Kozar and Morawski, {Antoni W.} and Mika Sillanp{\"a}{\"a}",
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Jafari, S, Tryba, B, Kusiak-Nejman, E, Kapica-Kozar, J, Morawski, AW & Sillanpää, M 2016, 'The role of adsorption in the photocatalytic decomposition of Orange II on carbon-modified TiO2', Journal of Molecular Liquids, vol. 220, pp. 504-512. https://doi.org/10.1016/j.molliq.2016.02.014

The role of adsorption in the photocatalytic decomposition of Orange II on carbon-modified TiO2. / Jafari, Shila; Tryba, Beata; Kusiak-Nejman, Ewelina; Kapica-Kozar, Joanna; Morawski, Antoni W.; Sillanpää, Mika.

In: Journal of Molecular Liquids, Vol. 220, 01.08.2016, p. 504-512.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The role of adsorption in the photocatalytic decomposition of Orange II on carbon-modified TiO2

AU - Jafari, Shila

AU - Tryba, Beata

AU - Kusiak-Nejman, Ewelina

AU - Kapica-Kozar, Joanna

AU - Morawski, Antoni W.

AU - Sillanpää, Mika

PY - 2016/8/1

Y1 - 2016/8/1

N2 - Carbon-modified TiO2was successfully prepared via simple heat treatment of TiO2in alcohol vapors (1-butanol and 2-butanol) at a constant temperature (500 °C). The prepared samples were characterized by means of X-ray diffraction (XRD) and Fourier transform infrared diffuse reflectance spectroscopy (FTIR/DRS). Brunauer-Emmett-Teller (BET) adsorption and zeta potential analyses were also conducted. The Freundlich adsorption model fitted both carbon-modified and original TiO2, which provide a heterogeneous surface for the adsorption of Orange II. The carbon-modified TiO2was used as a photocatalyst to remove Orange II from aqueous solution by combined processes of adsorption and photocatalytic decomposition. The adsorption performance of the carbon-modified TiO2was higher than that of the unmodified TiO2. Carbon adsorption approached synchronicity with oxidation, leading to the higher activity. This enhanced adsorption capacity may be a promising factor for the photocatalytic removal of Orange II onto carbon-modified TiO2. The prepared Carbon-modified TiO2samples had higher BET surface area than unmodified TiO2(44, 54.48 and 49.72 m2/g for TiO2, C1B-TiO2and C2B-TiO2, respectively) and exhibited higher hydrophobicity and a positively charged surface, which were favorable for adsorption of Orange II. High adsorption of dye on the porous structure of C-TiO2enhanced its photocatalytic decomposition under visible light.

AB - Carbon-modified TiO2was successfully prepared via simple heat treatment of TiO2in alcohol vapors (1-butanol and 2-butanol) at a constant temperature (500 °C). The prepared samples were characterized by means of X-ray diffraction (XRD) and Fourier transform infrared diffuse reflectance spectroscopy (FTIR/DRS). Brunauer-Emmett-Teller (BET) adsorption and zeta potential analyses were also conducted. The Freundlich adsorption model fitted both carbon-modified and original TiO2, which provide a heterogeneous surface for the adsorption of Orange II. The carbon-modified TiO2was used as a photocatalyst to remove Orange II from aqueous solution by combined processes of adsorption and photocatalytic decomposition. The adsorption performance of the carbon-modified TiO2was higher than that of the unmodified TiO2. Carbon adsorption approached synchronicity with oxidation, leading to the higher activity. This enhanced adsorption capacity may be a promising factor for the photocatalytic removal of Orange II onto carbon-modified TiO2. The prepared Carbon-modified TiO2samples had higher BET surface area than unmodified TiO2(44, 54.48 and 49.72 m2/g for TiO2, C1B-TiO2and C2B-TiO2, respectively) and exhibited higher hydrophobicity and a positively charged surface, which were favorable for adsorption of Orange II. High adsorption of dye on the porous structure of C-TiO2enhanced its photocatalytic decomposition under visible light.

U2 - 10.1016/j.molliq.2016.02.014

DO - 10.1016/j.molliq.2016.02.014

M3 - Article

VL - 220

SP - 504

EP - 512

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

SN - 0167-7322

ER -