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Hydrothermal preparation of PbS crystals and shape evolution
- Source :
-
Materials Research Bulletin . Jan2007, Vol. 42 Issue 1, p17-26. 10p. - Publication Year :
- 2007
-
Abstract
- Abstract: In the current paper, we successfully prepared lead sulfide (PbS) microcrystals with various shapes in a simple aqueous system using the hydrothermal synthesis route. Experimental results indicated that the change of the molar ratio of Pb2+/S2O3 2− could significantly influence the morphology of the product while keeping the other experimental conditions constant: with the decrease of the molar ratio of Pb2+/S2O3 2− from 1:1 to 1:4, the shape of the products varied from tri-prism, cube to magic-square structure. Changing the reaction temperature had big effect on the shape of the product: flower-shaped product was obtained at 80°C and cube-shaped products were produced at 120°C. When the reaction time varied, the shapes of the as-obtained PbS crystals also changed. At the same time, SEM observations showed that the counter-anions for Pb2+ could influence the shape of the product: Pb(NO3)2 being used as lead ion sources, most flower-shaped and few cubic PbS crystals were produced; while PbSO4 as lead ion source, the PbS cubes were obtained. An evolution process was described based on experimental facts. [Copyright &y& Elsevier]
- Subjects :
- *CRYSTALS
*CRYSTALLOGRAPHY
*ANIONS
*REACTION time
*PRISMS
Subjects
Details
- Language :
- English
- ISSN :
- 00255408
- Volume :
- 42
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Materials Research Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 23449902
- Full Text :
- https://doi.org/10.1016/j.materresbull.2006.05.016