Impact of palladium substitution for copper in Bi2CuO4 synthesized via sol-gel method
Laboratory of Physical Chemistry of Materials: Catalysis and Environment, Faculty of Science, Department of Chemistry, University of Science and Technology of Oran, BP 1505, 31000 El-Mnaouer, Oran, Algeria
Corresponding author: email@example.com
Revised: 17 October 2010
Accepted: 21 October 2010
Published online: 23 December 2010
An extensive new solid solution was synthesized by substitution of Pd+2 for Cu+2 in Bi2CuO4 compound [J.-C. Boivin et al., C.R. Hebd. Seances Acad. Sci., Ser. C 276, 1105 (1973)]. Polycrystalline ceramic powder with formula Bi2CuPdxO4 were prepared by sol-gel method using (Bi, Cu, Pd) nitrates and pure citric acid. X-ray patterns show a single phase with tetragonal symmetry and space group P4/ncc (No. 130). In cases, the tetragonal cell c parameter and therefore the metal-metal distance (dM-M = c/2) increases linearly with increasing palladium concentration. Electrical conductivity measurements show that the resistivity decreases regularly with pd2+ substitution. It is possible to obtain materials with an ambient temperature conductivity ranging from 10-6 to 10-3 S cm-1.
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