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Solvothermal Synthesis of Tungsten Oxide Nanorod/Nanowire/Nanosheet
Author(s) -
Choi Hong Goo,
Jung Young Hwa,
Kim Do Kyung
Publication year - 2005
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.1551-2916.2005.00341.x
Subject(s) - nanorod , materials science , monoclinic crystal system , tungsten , nanosheet , nanowire , oxide , chemical engineering , solvothermal synthesis , inorganic chemistry , nanoparticle , nanotechnology , crystal structure , chemistry , metallurgy , crystallography , engineering
A simple process enables to synthesize tungsten oxide with various nanomorphologies, i.e. nanorods, nanowires, and nanosheets. The tungsten hexachloride (WCl 6 ) was used as a raw material and the tungsten oxide nanoparticles were obtained by solvothermal treatment with solvents, i.e., ethanol, mixed solvent (ethanol+water), and water, at 200°C for 10 h. The various crystalline phases of tungsten oxide, such as monoclinic W 18 O 49 nanorods, hexagonal WO 3 platelets, and monoclinic WO 3 nanosheets, were synthesized by simply changing the composition of the solvent. The oxygen, which was contained in water, played an important role in the final tungsten oxide phase. Especially, W 18 O 49 nanorods grew to nanowires as the concentration of WCl 6 was decreased. Using this simple process, it will be possible to control the crystalline phase and morphologies of nanostructured tungsten oxide system.