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Selective Synthesis and Characterization of Single‐Crystal Silver Molybdate/Tungstate Nanowires by a Hydrothermal Process
Author(s) -
Cui Xianjin,
Yu ShuHong,
Li Lingling,
Biao Liu,
Li Huabin,
Mo Maosong,
Liu XianMing
Publication year - 2004
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.200305429
Subject(s) - molybdate , nanorod , nanowire , tungstate , hydrothermal circulation , materials science , hydrothermal synthesis , recrystallization (geology) , molybdenum , tungsten , chemical engineering , nanotechnology , melting point , vapor–liquid–solid method , crystallography , chemistry , metallurgy , composite material , paleontology , engineering , biology
Selective synthesis of uniform single crystalline silver molybdate/tungstate nanorods/nanowires in large scale can be easily realized by a facile hydrothermal recrystallization technique. The synthesis is strongly dependent on the pH conditions, temperature, and reaction time. The phase transformation was examined in details. Pure Ag 2 MoO 4 and Ag 6 Mo 10 O 33 can be easily obtained under neutral condition and pH 2, respectively, whereas other mixed phases of Mo 17 O 47 , Ag 2 Mo 2 O 7, Ag 6 Mo 10 O 33 were observed under different pH conditions. Ag 6 Mo 10 O 33 nanowires with uniform diameter 50–60 nm and length up to several hundred micrometers were synthesized in large scale for the first time at 140 °C. The melting point of Ag 6 Mo 10 O 33 nanowires were found to be about 238 °C. Similarly, Ag 2 WO 4 , and Ag 2 W 2 O 7 nanorods/nanowires can be selectively synthesized by controlling pH value. The results demonstrated that this route could be a potential mild way to selectively synthesize various molybdate nanowires with various phases in large scale.