Synthesis of Ternary Chalcogenides in Cu-As-Se Systems by the Solvothermal Method in Organic Medium and Production of Nano-and Microparticles

Year 2024, , 483 - 490, 15.05.2024

Turac Suleymanova

https://doi.org/10.18596/jotcsa.1231804

Abstract

Ternary selenides CuAsSe2 and Cu3AsSe3 were synthesized by the solvothermal method from H [CuCl2]-As2Se3-C2H6O2 system. Nano and microparticles were obtained, and their physical and chemical properties were studied. During syntheses, sodium metaarsenite and copper (I) chloride are mixed in ethylene glycol, and a solution of Na2SeSO3 is added as a selenidation reagent according to stoichiometry. These solutions were added to an experimental vessel, placed in a Teflon cuvette, sealed, and placed in a microwave electric heater. The samples are kept in the oven at 413-443 K for 10 hours. After the process, the precipitate is filtered through a glass filter, washed first with dilute hydrochloric acid and distilled water, and finally with ethyl alcohol, and dried in a vacuum at 333-343 K. The productivity of the samples was 90-92 %. Compounds formed at a temperature of 453-473 K dissolve. Nanoparticles of compounds obtained at a temperature of 413-433 K have an irregular shape. Nanoparticles obtained at a temperature of 443 K are in the form of plates. The results of the X-ray phase analysis showed that the compounds correspond to cubic zirconia and belong to the Pm3m spatial structure. Lattice parameters of CuAsSe2 compound: a = 5.513 Å, Z = 2 and lattice parameters of Cu3AsSe3 compound: a = 5.76 Å, Z = 1. Based on DTA results, the CuAsSe2 compound melts congruently at 743 K, while the Cu3AsSe3 compound decomposes at 773 K.

Keywords

solvothermal method, nanoparticles, scanning electron microscope, XRF, melting point, unit cell.

Supporting Institution

Based on the presentation at the XXXIII İnternational Scientific Symposium.

Thanks

Based on the presentation at the framework of scientific and cultural relations between Kyrgyzstan and Azerbaijan, organized by the Elger Science and Education Center, the conference was held with Kyrgyz Jusup Balasagun Kyrgyz National University XXXIII İnternational Scientific Symposium.

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