Effect of Erbium on the Photocatalytic Activity of TiO2/Ag Nanocomposites under Visible Light Irradiation

Natarajan Prakash; Rajan Karthikeyan; Dheivasigamani Thangaraju; Mani Navaneethan; Mukannan Arivanandhan; Tadanobu Koyama; Yasuhiro Hayakawa

doi:10.1002/cphc.201500492

Effect of Erbium on the Photocatalytic Activity of TiO₂/Ag Nanocomposites under Visible Light Irradiation

Natarajan Prakash, Rajan Karthikeyan, Dheivasigamani Thangaraju, Mani Navaneethan, Mukannan Arivanandhan, Tadanobu Koyama, Yasuhiro Hayakawa

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

13 Scopus citations

Abstract

Erbium co-doped TiO₂/Ag catalysts are synthesized by using a simple, one-step solvothermal method and characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Raman analysis, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The catalysts exhibit anatase crystal structures with increased visible light absorption compared with pure TiO₂. Enhanced photocatalytic activity is observed with Er co-doped TiO₂/Ag nanocomposites for Rhodamine B degradation under visible light irradiation. The photocatalytic activity of 1 % Er co-doped TiO₂/Ag is much higher than that of TiO₂/Ag, TiO₂/Er, pure TiO₂, and commercial Degussa P25. The kinetics of the degradation process are studied and the pseudo-first-order rate constant (k) and half-life time (t_1/2) of the reaction are calculated. The enhanced activity might be accredited to the efficient separation of electron-hole pairs by silver and higher visible light absorption of TiO₂ induced by Er.

Original language	English
Pages (from-to)	3084-3092
Number of pages	9
Journal	ChemPhysChem
Volume	16
Issue number	14
DOIs	https://doi.org/10.1002/cphc.201500492
State	Published - 1 Oct 2015
Externally published	Yes

Keywords

doping
nanostructures
photocatalysis
rare earths
titania

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Physical and Theoretical Chemistry

Access to Document

10.1002/cphc.201500492

Cite this

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title = "Effect of Erbium on the Photocatalytic Activity of TiO2/Ag Nanocomposites under Visible Light Irradiation",

abstract = "Erbium co-doped TiO2/Ag catalysts are synthesized by using a simple, one-step solvothermal method and characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Raman analysis, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The catalysts exhibit anatase crystal structures with increased visible light absorption compared with pure TiO2. Enhanced photocatalytic activity is observed with Er co-doped TiO2/Ag nanocomposites for Rhodamine B degradation under visible light irradiation. The photocatalytic activity of 1 % Er co-doped TiO2/Ag is much higher than that of TiO2/Ag, TiO2/Er, pure TiO2, and commercial Degussa P25. The kinetics of the degradation process are studied and the pseudo-first-order rate constant (k) and half-life time (t1/2) of the reaction are calculated. The enhanced activity might be accredited to the efficient separation of electron-hole pairs by silver and higher visible light absorption of TiO2 induced by Er.",

keywords = "doping, nanostructures, photocatalysis, rare earths, titania",

author = "Natarajan Prakash and Rajan Karthikeyan and Dheivasigamani Thangaraju and Mani Navaneethan and Mukannan Arivanandhan and Tadanobu Koyama and Yasuhiro Hayakawa",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

year = "2015",

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doi = "10.1002/cphc.201500492",

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T1 - Effect of Erbium on the Photocatalytic Activity of TiO2/Ag Nanocomposites under Visible Light Irradiation

AU - Prakash, Natarajan

AU - Karthikeyan, Rajan

AU - Thangaraju, Dheivasigamani

AU - Navaneethan, Mani

AU - Arivanandhan, Mukannan

AU - Koyama, Tadanobu

AU - Hayakawa, Yasuhiro

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Erbium co-doped TiO2/Ag catalysts are synthesized by using a simple, one-step solvothermal method and characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Raman analysis, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The catalysts exhibit anatase crystal structures with increased visible light absorption compared with pure TiO2. Enhanced photocatalytic activity is observed with Er co-doped TiO2/Ag nanocomposites for Rhodamine B degradation under visible light irradiation. The photocatalytic activity of 1 % Er co-doped TiO2/Ag is much higher than that of TiO2/Ag, TiO2/Er, pure TiO2, and commercial Degussa P25. The kinetics of the degradation process are studied and the pseudo-first-order rate constant (k) and half-life time (t1/2) of the reaction are calculated. The enhanced activity might be accredited to the efficient separation of electron-hole pairs by silver and higher visible light absorption of TiO2 induced by Er.

AB - Erbium co-doped TiO2/Ag catalysts are synthesized by using a simple, one-step solvothermal method and characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Raman analysis, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The catalysts exhibit anatase crystal structures with increased visible light absorption compared with pure TiO2. Enhanced photocatalytic activity is observed with Er co-doped TiO2/Ag nanocomposites for Rhodamine B degradation under visible light irradiation. The photocatalytic activity of 1 % Er co-doped TiO2/Ag is much higher than that of TiO2/Ag, TiO2/Er, pure TiO2, and commercial Degussa P25. The kinetics of the degradation process are studied and the pseudo-first-order rate constant (k) and half-life time (t1/2) of the reaction are calculated. The enhanced activity might be accredited to the efficient separation of electron-hole pairs by silver and higher visible light absorption of TiO2 induced by Er.

KW - doping

KW - nanostructures

KW - photocatalysis

KW - rare earths

KW - titania

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