Photocatalytic effects for the TiO2-coated phosphor materials

Jin Ho Yoon; Sang Chul Jung; Jung Sik Kim

doi:10.1016/j.matchemphys.2010.11.004

Photocatalytic effects for the TiO₂-coated phosphor materials

Jin Ho Yoon, Sang Chul Jung, Jung Sik Kim

Department of Materials Science and Engineering

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

31 Scopus citations

Abstract

This study investigated the photocatalytic behavior of the coupling of TiO₂ with phosphorescent materials. A TiO₂ thin film was deposited on CaAl₂O₄:Eu²⁺,Nd³⁺ phosphor particles by using atomic layer deposition (ALD), and its photocatalytic reaction was investigated by the photobleaching of an aqueous solution of methylene-blue (MB) under visible light irradiation. To clarify the mechanism of the TiO₂-phosphorescent materials, two different samples of TiO₂-coated phosphor and TiO₂-Al₂O ₃-coated phosphor particles were prepared. The photocatalytic mechanisms of the ALD TiO₂-coated phosphor powders were different from those of the pure TiO₂ and TiO₂-Al₂O ₃-coated phosphor. The absorbance in a solution of the ALD TiO ₂-coated phosphor decreased much faster than that of pure TiO ₂ under visible irradiation. In addition, the ALD TiO ₂-coated phosphor showed moderately higher photocatalytic degradation of MB solution than the TiO₂-Al₂O₃-coated phosphor did. The TiO₂-coated phosphorescent materials were characterized by transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and X-ray photon spectroscopy (XPS).

Original language	English
Pages (from-to)	342-346
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	125
Issue number	3
DOIs	https://doi.org/10.1016/j.matchemphys.2010.11.004
State	Published - 15 Feb 2011

Keywords

Atomic layer deposition
CaAl O: Eu,Nd
Photocatalyst
TiO

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10.1016/j.matchemphys.2010.11.004

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title = "Photocatalytic effects for the TiO2-coated phosphor materials",

abstract = "This study investigated the photocatalytic behavior of the coupling of TiO2 with phosphorescent materials. A TiO2 thin film was deposited on CaAl2O4:Eu2+,Nd3+ phosphor particles by using atomic layer deposition (ALD), and its photocatalytic reaction was investigated by the photobleaching of an aqueous solution of methylene-blue (MB) under visible light irradiation. To clarify the mechanism of the TiO2-phosphorescent materials, two different samples of TiO2-coated phosphor and TiO2-Al2O 3-coated phosphor particles were prepared. The photocatalytic mechanisms of the ALD TiO2-coated phosphor powders were different from those of the pure TiO2 and TiO2-Al2O 3-coated phosphor. The absorbance in a solution of the ALD TiO 2-coated phosphor decreased much faster than that of pure TiO 2 under visible irradiation. In addition, the ALD TiO 2-coated phosphor showed moderately higher photocatalytic degradation of MB solution than the TiO2-Al2O3-coated phosphor did. The TiO2-coated phosphorescent materials were characterized by transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and X-ray photon spectroscopy (XPS).",

keywords = "Atomic layer deposition, CaAl O: Eu,Nd, Photocatalyst, TiO",

author = "Yoon, {Jin Ho} and Jung, {Sang Chul} and Kim, {Jung Sik}",

year = "2011",

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doi = "10.1016/j.matchemphys.2010.11.004",

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AU - Yoon, Jin Ho

AU - Jung, Sang Chul

AU - Kim, Jung Sik

PY - 2011/2/15

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N2 - This study investigated the photocatalytic behavior of the coupling of TiO2 with phosphorescent materials. A TiO2 thin film was deposited on CaAl2O4:Eu2+,Nd3+ phosphor particles by using atomic layer deposition (ALD), and its photocatalytic reaction was investigated by the photobleaching of an aqueous solution of methylene-blue (MB) under visible light irradiation. To clarify the mechanism of the TiO2-phosphorescent materials, two different samples of TiO2-coated phosphor and TiO2-Al2O 3-coated phosphor particles were prepared. The photocatalytic mechanisms of the ALD TiO2-coated phosphor powders were different from those of the pure TiO2 and TiO2-Al2O 3-coated phosphor. The absorbance in a solution of the ALD TiO 2-coated phosphor decreased much faster than that of pure TiO 2 under visible irradiation. In addition, the ALD TiO 2-coated phosphor showed moderately higher photocatalytic degradation of MB solution than the TiO2-Al2O3-coated phosphor did. The TiO2-coated phosphorescent materials were characterized by transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and X-ray photon spectroscopy (XPS).

AB - This study investigated the photocatalytic behavior of the coupling of TiO2 with phosphorescent materials. A TiO2 thin film was deposited on CaAl2O4:Eu2+,Nd3+ phosphor particles by using atomic layer deposition (ALD), and its photocatalytic reaction was investigated by the photobleaching of an aqueous solution of methylene-blue (MB) under visible light irradiation. To clarify the mechanism of the TiO2-phosphorescent materials, two different samples of TiO2-coated phosphor and TiO2-Al2O 3-coated phosphor particles were prepared. The photocatalytic mechanisms of the ALD TiO2-coated phosphor powders were different from those of the pure TiO2 and TiO2-Al2O 3-coated phosphor. The absorbance in a solution of the ALD TiO 2-coated phosphor decreased much faster than that of pure TiO 2 under visible irradiation. In addition, the ALD TiO 2-coated phosphor showed moderately higher photocatalytic degradation of MB solution than the TiO2-Al2O3-coated phosphor did. The TiO2-coated phosphorescent materials were characterized by transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and X-ray photon spectroscopy (XPS).

KW - Atomic layer deposition

KW - CaAl O: Eu,Nd

KW - Photocatalyst

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SP - 342

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JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

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ER -

Photocatalytic effects for the TiO₂-coated phosphor materials

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