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Colloidal Synthesis and Photocatalytic Performance of Size‐Controllable Solid or Hollow CuInSe 2 Nanocrystals
Author(s) -
Sheng Pengtao,
Li Weili,
Wang Xin,
Tong Xi,
Cai Qingyun
Publication year - 2014
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402161
Subject(s) - ostwald ripening , photocatalysis , dispersity , materials science , nanocrystal , methyl orange , photocurrent , chemical engineering , quantum dot , nanotechnology , colloid , nanoparticle , chalcopyrite , chemistry , optoelectronics , copper , polymer chemistry , catalysis , organic chemistry , metallurgy , engineering
Abstract Morphology evolution dependence on reaction time has been investigated to find a way to overcome polydispersity of the chalcopyrite CuInSe 2 nanocrystals (NCs). A building–crumbling process is presented to understand the formation of small NCs. By carefully controlling magnetic stirring, ligand content, and duration, the polydispersity is fundamentally improved; thus solid and hollow spherical NCs and quantum dots can be easily obtained with tunable sizes. It is proposed that the NCs undergo Ostwald ripening induced morphology evolution from solid to hollow NCs. The photoelectric properties and photocatalytic activity have been investigated with TiO 2 nanotube array based photoelectrodes. A maximum saturation photocurrent of 12.6 mA cm −2 has been achieved, and a structure‐dependent photocatalytic property has also been confirmed by using methyl orange as a model pollutant.