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Preparation and Properties of Nanocrystalline α‐Fe 2 O 3 ‐Sensitized TiO 2 Nanosheets as a Visible Light Photocatalyst
Author(s) -
Liu Hongyan,
Gao Lian
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00686.x
Subject(s) - photocatalysis , visible spectrum , nanocrystalline material , semiconductor , materials science , methylene blue , degradation (telecommunications) , band gap , absorption (acoustics) , irradiation , fabrication , photochemistry , nanotechnology , chemical engineering , optoelectronics , chemistry , composite material , catalysis , engineering , telecommunications , physics , alternative medicine , pathology , medicine , biochemistry , computer science , nuclear physics
We present a novel approach for the fabrication of α‐Fe 2 O 3 ‐sensitized TiO 2 nanosheets. The TiO 2 nanosheets with partly curly surfaces and large surface areas can rapidly absorb the methylene blue (MB). The absorption and degradation of MB are investigated. Results show that the photocatalytic activities of α‐Fe 2 O 3 make the MB degradation efficient under visible light irradiation. By coupling two semiconductor systems, electrons can be injected from an excited small band gap semiconductor into TiO 2 under visible light. Such a modification is expected to lead to new or enhanced properties.