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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.51A [2012] >
IJC-A Vol.51A(07) [July 2012] >
| Title: | Effect of glycine concentration on the properties of LaCoO3 perovskite prepared by the glycine-nitrate process |
| Authors: | Kondakindi, Rajender R |
| Keywords: | Glycine-nitrate process
Perovskites
Mixed oxides
Lanthanum cobaltate
Surface area
Particle size |
| Issue Date: | Jul-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | LaCoO3 nanocrystals have been
prepared by the glycine-nitrate process. The effect of glycine content in the
synthesis solution on various properties of LaCoO3 has been studied
in the glycine-to-nitrate molar ratio between 0.75 and 2.0. The samples are
characterized by X-ray diffraction for phase purity and particle size, by
transmission electron microscopy for particle size, by BET for surface area and
by temperature-programmed reduction for reducibility of Con+. XRD
reflections show the presence of impurities in the as-prepared samples while
only rhombohedral phase could be identified in the samples after calcination at
700 °C. For all the glycine-to-nitrate
ratios tested, the particle size estimated from XRD data ranges from 58-69 nm,
which are systematically lower than those determined by BET which ranged from
97-118 nm. TPR profiles of the samples show two major peaks; one due to the
reduction of Co3+ to Co2+ and the other
due to the reduction of Co2+ to Co0. The samples prepared
under fuel-deficient and fuel-rich conditions show higher reducibility as
compared to that of the sample prepared under stoichiometric conditions.
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| Page(s): | 931-936 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.51A(07) [July 2012]
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