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Controllable Synthesis and Growth Mechanism of Ceria Nanocubes by Template‐Free Hydrothermal Method
Author(s) -
Zhang Hepeng,
Yang Bo,
Li Huan,
Wu Chen,
Wang Wenbin,
Zhang Baoliang,
Zhang Qiuyu,
Zhang Chongyin
Publication year - 2018
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201700233
Subject(s) - ostwald ripening , dissolution , recrystallization (geology) , hydrothermal circulation , materials science , chemical engineering , catalysis , nanotechnology , surface energy , chemistry , composite material , geology , paleontology , engineering , biochemistry
Different crystal planes of CeO 2 have a different number of broken bonds, surface energy and catalytic activities, so preparing the CeO 2 with different exposed planes has attracted extensive attention. In recent years, the preparation of CeO 2 nanocubes with {100} exposed plane has been a real hotspot of research because of its good catalytic performance. Based on the research about the alkali concentration, reaction temperature and reaction time, the formation mechanism of CeO 2 nanocubes was explored. It is believed that the dissolution‐recrystallization process is accelerated in the condition of strong base, high temperature and high pressure. In other word, the Ostwald ripening process is strengthened, which is the decisive factor for the formation of CeO 2 nanocubes.