Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate

Tae Woo Kim; Su Gil Hur; Seong Ju Hwang; Hyunwoong Park; Wonyong Choi; Jin Ho Choy

doi:10.1002/adfm.200600022

Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate

Tae Woo Kim, Su Gil Hur, Seong Ju Hwang, Hyunwoong Park, Wonyong Choi, Jin Ho Choy

School of Energy Engineering

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

164 Scopus citations

Abstract

An efficient visible-light active photocatalyst of porous CrO _x-Ti_1.83O₄ nanohybrid with a 1:1 type ordered heterostructure is synthesized through a hybridization between a chromia cluster and exfoliated titanate nanosheets. The present nanohybrids are found to have a large surface area (ca. 250-310 m² g^-1) and an intense absorption of visible light, ascribable, respectively, to the formation of a porous structure and the hybridization of titanate with narrow-bandgap chromium oxide. After the calcination at 400°C, the nanohybrid shows an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (λ > 420 nm). The present study highlights the exfoliation-restacking route as a very powerful way to develop efficient visible-light-harvesting photocatalysts with excellent thermal stability.

Original language	English
Pages (from-to)	307-314
Number of pages	8
Journal	Advanced Functional Materials
Volume	17
Issue number	2
DOIs	https://doi.org/10.1002/adfm.200600022
State	Published - 22 Jan 2007

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title = "Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate",

abstract = "An efficient visible-light active photocatalyst of porous CrO x-Ti1.83O4 nanohybrid with a 1:1 type ordered heterostructure is synthesized through a hybridization between a chromia cluster and exfoliated titanate nanosheets. The present nanohybrids are found to have a large surface area (ca. 250-310 m2 g-1) and an intense absorption of visible light, ascribable, respectively, to the formation of a porous structure and the hybridization of titanate with narrow-bandgap chromium oxide. After the calcination at 400°C, the nanohybrid shows an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (λ > 420 nm). The present study highlights the exfoliation-restacking route as a very powerful way to develop efficient visible-light-harvesting photocatalysts with excellent thermal stability.",

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AU - Kim, Tae Woo

AU - Hur, Su Gil

AU - Hwang, Seong Ju

AU - Park, Hyunwoong

AU - Choi, Wonyong

AU - Choy, Jin Ho

PY - 2007/1/22

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N2 - An efficient visible-light active photocatalyst of porous CrO x-Ti1.83O4 nanohybrid with a 1:1 type ordered heterostructure is synthesized through a hybridization between a chromia cluster and exfoliated titanate nanosheets. The present nanohybrids are found to have a large surface area (ca. 250-310 m2 g-1) and an intense absorption of visible light, ascribable, respectively, to the formation of a porous structure and the hybridization of titanate with narrow-bandgap chromium oxide. After the calcination at 400°C, the nanohybrid shows an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (λ > 420 nm). The present study highlights the exfoliation-restacking route as a very powerful way to develop efficient visible-light-harvesting photocatalysts with excellent thermal stability.

AB - An efficient visible-light active photocatalyst of porous CrO x-Ti1.83O4 nanohybrid with a 1:1 type ordered heterostructure is synthesized through a hybridization between a chromia cluster and exfoliated titanate nanosheets. The present nanohybrids are found to have a large surface area (ca. 250-310 m2 g-1) and an intense absorption of visible light, ascribable, respectively, to the formation of a porous structure and the hybridization of titanate with narrow-bandgap chromium oxide. After the calcination at 400°C, the nanohybrid shows an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light (λ > 420 nm). The present study highlights the exfoliation-restacking route as a very powerful way to develop efficient visible-light-harvesting photocatalysts with excellent thermal stability.

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Heterostructured visible-light-active photocatalyst of chromia- nanoparticle-layered titanate

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