Please use this identifier to cite or link to this item: https://doi.org/10.1021/cm0206237
Title: Hydrothermal synthesis of α-MoO3 nanorods via acidification of ammonium heptamolybdate tetrahydrate
Authors: Lou, X.W.
Zeng, H.C. 
Issue Date: 1-Nov-2002
Citation: Lou, X.W., Zeng, H.C. (2002-11-01). Hydrothermal synthesis of α-MoO3 nanorods via acidification of ammonium heptamolybdate tetrahydrate. Chemistry of Materials 14 (11) : 4781-4789. ScholarBank@NUS Repository. https://doi.org/10.1021/cm0206237
Abstract: One-dimensional nanostructures of orthorhombic molybdenum trioxide (α-MoO3) have been synthesized in the forms of ribbons or rods via acidification under hydrothermal conditions at 140-200 °C. The reaction path has been revealed with our kinetic investigations, which shows the following sequence: (i) from the starting compound (NH4)6Mo7O24 ·4H2O to (ii) formation of intermediate compound ((NH4)2O)0.0866 ·MoO3·0.231H2O, and then to (iii) final α-MoO3 nanoribbons or nanorods in 100% phase purity. The optimal growth temperature is in the range of 170-180 °C under the current experimental settings. At higher reaction temperatures, this transformation can be accelerated, but with poorer crystal morphological homogeneity. It has been found that the dimensions of these rectangular nanorods are about 50 nm in thickness, 150-300 nm (mean value at 200 nm) in width, and a few tens of micrometers in length. The crystal morphology can be further altered with inorganic salts such as NaNO3, KNO3, Mg(NO3)2, and Al(NO3)3. Using an H2S/H2 stream, the above-prepared α-MoO3 nanorods can be converted completely to 2H-MoS2 nanorods at 600 °C. The original rodlike morphology is well-retained, although the aspect ratio of the oxide template is reduced upon the sulfidation treatment.
Source Title: Chemistry of Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/92037
ISSN: 08974756
DOI: 10.1021/cm0206237
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

279
checked on Nov 13, 2018

WEB OF SCIENCETM
Citations

271
checked on Nov 5, 2018

Page view(s)

98
checked on Nov 16, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.