Please use this identifier to cite or link to this item:
|Title:||Mechanistic investigation on salt-mediated formation of free-standing Co3O4 nanocubes at 95°C|
|Source:||Xu, R., Zeng, C. (2003-01-30). Mechanistic investigation on salt-mediated formation of free-standing Co3O4 nanocubes at 95°C. Journal of Physical Chemistry B 107 (4) : 926-930. ScholarBank@NUS Repository. https://doi.org/10.1021/jp021094x|
|Abstract:||The transformation process of various cobalt hydroxide and hydroxide nitrate into final free-standing Co3O4 nanocubes with a uniform size of ca. 47 nm has been investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and high-resolution transmission electron microscopy (HRTEM) methods. It is found that during their sequential oxidation under air bubbling at 95°C, β-Co(OH)2 and CoII(OH)2-x(NO3)x· NH2O solid phases are gradually oxidized to a mixture of CoII 1-xCoIII x(OH)2 (NO3)x·nH2O and Co3O4 in high concentration nitrate salt (e.g., NaNO3) solution, through which the single-phase Co3O4 nanocubes have been formed with a prolonged oxidation. With the mediation of NaNO3 salt in synthesis, formation of perfectly faceted Co3O4 nanocubes can be attributed to a lowering in O2 solubility and creation of salt-(solvent)n diffusion boundary on the surfaces, which retards the cobalt oxidation and alters the normal interfacial growth under nonsalted conditions.|
|Source Title:||Journal of Physical Chemistry B|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 21, 2018
WEB OF SCIENCETM
checked on Nov 22, 2017
checked on Feb 17, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.