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Heterostructured Visible‐Light‐Active Photocatalyst of Chromia‐Nanoparticle‐Layered Titanate
Author(s) -
Kim T. W.,
Hur S. G.,
Hwang S.J.,
Park H.,
Choi W.,
Choy J.H.
Publication year - 2007
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200600022
Subject(s) - materials science , photocatalysis , visible spectrum , calcination , titanate , chromia , nanoparticle , exfoliation joint , heterojunction , chemical engineering , oxide , nanotechnology , graphene , optoelectronics , composite material , ceramic , catalysis , organic chemistry , chemistry , engineering , metallurgy
An efficient visible‐light active photocatalyst of porous CrO x –Ti 1.83 O 4 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 m 2 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.