Preparation and photocatalytic properties of Cr/Ti hollow spheres

Hong Rok Kim; Yujin Eom; Tai Gyu Lee; Yong Gun Shul

doi:10.1016/j.matchemphys.2007.09.018

Preparation and photocatalytic properties of Cr/Ti hollow spheres

Hong Rok Kim, Yujin Eom, Tai Gyu Lee, Yong Gun Shul

Department of Chemical and Biomolecular Engineering

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

17 Citations (Scopus)

Abstract

Cr/Ti hollow spheres were prepared using poly-(styrene-methyl acrylic acid) latex particles as a template. The photodecomposition of the methylene blue (MB) was evaluated on these Cr/Ti hollow spheres under visible light irradiation. The catalyst samples were characterized by XRD, TEM, UV-DRS, SEM, and BET, and the prepared sample was obtained with the formation of predominant rutile. The observation from UV-DRS showed that the increase of Cr³⁺ contents shifted the light absorption of the specimens to the visible region. In this study, the 0.5% Cr/Ti hollow sphere exhibited the highest MB photodecomposition. The BET surface area was found to be ∼25.5 m² g^-1 for the 0.5% Cr/Ti hollow sphere. The modification of the TiO₂ surface by chromium ion improved the photocatalytic activity under visible light.

Original language	English
Pages (from-to)	154-159
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	108
Issue number	1
DOIs	https://doi.org/10.1016/j.matchemphys.2007.09.018
Publication status	Published - 2008 Mar 15

Bibliographical note

Funding Information:
This work was supported by KOSEF through NCRC for Nanomedical Technology (R15-2004-024-00000-0) and by Korea Research Foundation Grant (R08-2003-000-10214-0).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics

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title = "Preparation and photocatalytic properties of Cr/Ti hollow spheres",

abstract = "Cr/Ti hollow spheres were prepared using poly-(styrene-methyl acrylic acid) latex particles as a template. The photodecomposition of the methylene blue (MB) was evaluated on these Cr/Ti hollow spheres under visible light irradiation. The catalyst samples were characterized by XRD, TEM, UV-DRS, SEM, and BET, and the prepared sample was obtained with the formation of predominant rutile. The observation from UV-DRS showed that the increase of Cr3+ contents shifted the light absorption of the specimens to the visible region. In this study, the 0.5% Cr/Ti hollow sphere exhibited the highest MB photodecomposition. The BET surface area was found to be ∼25.5 m2 g-1 for the 0.5% Cr/Ti hollow sphere. The modification of the TiO2 surface by chromium ion improved the photocatalytic activity under visible light.",

author = "Kim, {Hong Rok} and Yujin Eom and Lee, {Tai Gyu} and Shul, {Yong Gun}",

note = "Funding Information: This work was supported by KOSEF through NCRC for Nanomedical Technology (R15-2004-024-00000-0) and by Korea Research Foundation Grant (R08-2003-000-10214-0).",

year = "2008",

month = mar,

day = "15",

doi = "10.1016/j.matchemphys.2007.09.018",

language = "English",

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T1 - Preparation and photocatalytic properties of Cr/Ti hollow spheres

AU - Kim, Hong Rok

AU - Eom, Yujin

AU - Lee, Tai Gyu

AU - Shul, Yong Gun

N1 - Funding Information: This work was supported by KOSEF through NCRC for Nanomedical Technology (R15-2004-024-00000-0) and by Korea Research Foundation Grant (R08-2003-000-10214-0).

PY - 2008/3/15

Y1 - 2008/3/15

N2 - Cr/Ti hollow spheres were prepared using poly-(styrene-methyl acrylic acid) latex particles as a template. The photodecomposition of the methylene blue (MB) was evaluated on these Cr/Ti hollow spheres under visible light irradiation. The catalyst samples were characterized by XRD, TEM, UV-DRS, SEM, and BET, and the prepared sample was obtained with the formation of predominant rutile. The observation from UV-DRS showed that the increase of Cr3+ contents shifted the light absorption of the specimens to the visible region. In this study, the 0.5% Cr/Ti hollow sphere exhibited the highest MB photodecomposition. The BET surface area was found to be ∼25.5 m2 g-1 for the 0.5% Cr/Ti hollow sphere. The modification of the TiO2 surface by chromium ion improved the photocatalytic activity under visible light.

AB - Cr/Ti hollow spheres were prepared using poly-(styrene-methyl acrylic acid) latex particles as a template. The photodecomposition of the methylene blue (MB) was evaluated on these Cr/Ti hollow spheres under visible light irradiation. The catalyst samples were characterized by XRD, TEM, UV-DRS, SEM, and BET, and the prepared sample was obtained with the formation of predominant rutile. The observation from UV-DRS showed that the increase of Cr3+ contents shifted the light absorption of the specimens to the visible region. In this study, the 0.5% Cr/Ti hollow sphere exhibited the highest MB photodecomposition. The BET surface area was found to be ∼25.5 m2 g-1 for the 0.5% Cr/Ti hollow sphere. The modification of the TiO2 surface by chromium ion improved the photocatalytic activity under visible light.

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DO - 10.1016/j.matchemphys.2007.09.018

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EP - 159

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

IS - 1

ER -

Preparation and photocatalytic properties of Cr/Ti hollow spheres

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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