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PAM-directed fabrication, shape evolution and formation mechanism of BaCO3 crystals with higher-order superstructures
- Source :
-
Journal of Crystal Growth . Oct2008, Vol. 310 Issue 20, p4460-4467. 8p. - Publication Year :
- 2008
-
Abstract
- Abstract: Barium carbonate crystals with higher-order superstructures have been successfully synthesized in a simple aqueous system containing a general polymer, polyacrylamide (PAM) at room temperature. BaCl2, NaHCO3 and NH3·H2O were used as the starting reagents. The X-ray powder diffraction (XRD) analysis showed the product was the orthorhombic BaCO3. Scanning electron microscopy (SEM) observations showed that higher-order superstructures were formed by the self-assembly of BaCO3 nanorods. Research showed that the morphology of the as-synthesized BaCO3 crystals could gradually evolve with the reaction time. Also, the morphology of BaCO3 crystals was affected by the initial concentrations of reactants: lower concentrations were used for the formation of dumbbell-shaped BaCO3 crystals. Based on the experimental results, a possible formation mechanism of BaCO3 superstructures was discussed. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00220248
- Volume :
- 310
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Journal of Crystal Growth
- Publication Type :
- Academic Journal
- Accession number :
- 34535145
- Full Text :
- https://doi.org/10.1016/j.jcrysgro.2008.07.077