Materials Characterization of Cobalt Antimonide Nanostructures as Thermoelectric Material

Cobalt antimonide (CoSb 3 ) nanoparticles, a binary skutterudite structure, are synthesized by following solvothermal method using water as solvent. The solvothermally processed powders are annealed to remove the excess Sb to achieve single phase CoSb 3 nanoparticles, and are examined by X-ray diffr...

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Bibliographic Details
Published in:Integrated ferroelectrics 2020-02, Vol.205 (1), p.66-71
Main Authors: Puri, Nidhi, Gupta, Raj K., Pattanaik, Akhyaya K., Tandon, Ram P., Padmavati, M. V. G., Mahapatro, Ajit K.
Format: Article
Language:English
Subjects:
Cobalt antimonide (CoSb3)
solvothermal synthesis
thermoelectric materials
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Summary:Cobalt antimonide (CoSb 3 ) nanoparticles, a binary skutterudite structure, are synthesized by following solvothermal method using water as solvent. The solvothermally processed powders are annealed to remove the excess Sb to achieve single phase CoSb 3 nanoparticles, and are examined by X-ray diffraction (XRD) indicating the formation of cubic phase of CoSb 3 . The structural analysis by selected area electron diffraction (SAED) and the elemental composition of 1:3 for Co and Sb using energy dispersive X-ray spectrophotometer (EDX) predicts formation of high purity crystalline CoSb 3 nanoparticles. Morphology of the annealed CoSb 3 powders observed using field emission scanning electron microscope (FESEM) and transmission electron microscopy (TEM) indicates particle size of 50-100 nm. The ultraviolet-visible (UV-Vis) absorption spectroscopy estimates an energy gap of 3 eV. The nanosized CoSb 3 skutterudites are potential intermediate-temperature thermoelectric materials with further application in developing efficient thermoelectric modules.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2019.1674999