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Size‐Dependent Surface Activity of Rutile and Anatase TiO 2 Nanocrystals: Facile Surface Modification and Enhanced Photocatalytic Performance
Author(s) -
Xiang Guolei,
Wang YangGang,
Wu Di,
Li Tianyang,
He Jie,
Li Jun,
Wang Xun
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102593
Subject(s) - anatase , photocatalysis , dispersity , rutile , nanocrystal , materials science , surface modification , chemical engineering , absorption (acoustics) , nanotechnology , photochemistry , chemistry , catalysis , polymer chemistry , organic chemistry , composite material , engineering
The size‐dependent surface activity of titania was illustrated through the formation of ultrafine nanocrystals with clean surfaces. It was demonstrated that, when the size of the nanocrystals was small enough, their surface activity could be significantly enhanced, as evidenced by the formation of transparent macroassemblies, their increased dispersity in various solvents, the facile modification of their surface by organic molecules at room temperature, their strong visible‐light absorption through coordination with peroxide, and highly enhanced photocatalytic performance.