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

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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

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All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics

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Kim, H. R., Eom, Y., Lee, T. G., & Shul, Y. G. (2008). Preparation and photocatalytic properties of Cr/Ti hollow spheres. Materials Chemistry and Physics, 108(1), 154-159. https://doi.org/10.1016/j.matchemphys.2007.09.018

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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.",

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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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10.1016/j.matchemphys.2007.09.018