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N + Ni Codoped Anatase TiO 2 Nanocrystals with Exposed {001} Facets Through Two‐Step Hydrothermal Route
Author(s) -
Zhang Yupeng,
Li Chenzhe,
Pan Chunxu
Publication year - 2012
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.1551-2916.2012.05358.x
Subject(s) - anatase , x ray photoelectron spectroscopy , photocatalysis , photoluminescence , hydrothermal circulation , diffractometer , nanocrystal , high resolution transmission electron microscopy , materials science , chemical engineering , transmission electron microscopy , nanotechnology , analytical chemistry (journal) , chemistry , scanning electron microscope , catalysis , optoelectronics , engineering , composite material , biochemistry , chromatography
This study introduces a facile and novel route to synthesize the N + Ni codoped anatase TiO 2 nanocrystals with exposed {001} facets through two‐step hydrothermal reaction. The microstructures, chemical compositions, and photocatalytic properties of the codoped TiO 2 were characterized using X ‐ray diffractometer, high‐resolution transmission electron microscopy, X ‐ray photoelectron spectroscopy, UV ‐vis spectrometry, and photoluminescence emission spectra. The experimental results revealed that (i) the elements N and Ni have been successfully codoped into the anatase TiO 2 with exposed {001} facets; (ii) the size of the TiO 2 reached to a narrow range of 5–15 nm; (iii) the codoped TiO 2 exhibited an additional visible light absorption band from 400 to 500 nm, which greatly improved the photocatalytic activity. The theoretical calculations for band structure and total energy also provided a good explanation for the experimental results.