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ARTICLE

Synthesis and physical characterization of novel Ag₂S-CdS /Ag /GNP ternary nanocomposite

L. R. Gahramanli^a,b,*, S. Bellucci^a, M. B. Muradov^b, M. La Pietra^a, G. M. Eyvazova^b, C. V. Gomez^a, J. Bachmann^c

a NEXT laboratory, INFN, LNF, Via E. Fermi 54, Frascati, Roma, Italy
b Nano Research Laboratory, Baku State University, Academic Zahid Khalilov Street 23, Baku, Azerbaijan
c Department of Chemistry and Pharmacy, Institute of Chair ‘Chemistry of Thin Film Materials’, Friedrich- Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany

* Corresponding Author:

Chalcogenide Letters 2024, 21(7), 513-527. https://doi.org/10.15251/CL.2024.217.513

Received 05 May 2024; Accepted 08 July 2024;

Abstract

A new type of Ag₂S-CdS/Ag/GNP nanocomposite material was successfully synthesized in the presented work. The structural and physical properties of compounds were studied separately and together. Ag₂S-CdS/Ag/GNP nanocomposite materials were studied by Xray diffraction (XRD), Ultraviolet-Visible (UV-Vis), Fourier Transform Infrared (FTIR), Raman spectroscopy and Scanning Electron Microscopy (SEM). Based on the results, Ag nanowires (NWs) were successfully synthesized, and then it was determined that during the hybridization process, two phases of acanthite Ag₂S and the cubic crystal system of Ag₂O were formed. Then, Ag₂S-CdS NWs were formed from mixed monoclinic Ag₂S and hexagonal CdS. In the absorption spectrum of Ag NWs, the main absorbance peaks were observed at 357.3 nm and 380.2 nm. The energy gap (Eg) values of the Ag sample are 3.8 eV. The band gap value of Ag₂S (2.5, 3.8, 4.6 eV) and Ag₂S-CdS (2.5, 3.8, 4.8 eV) have a triple value due to the formation of a hybrid structure. The Raman spectrum of Ag₂S-CdS belongs to longitudinal-optical (LO) phonon modes of zinc-blende phase CdS and for the 1, 2, and 3 times spin-coated samples on the surface of GNP/PVA have observed all characteristic Raman peaks, which belong to NWs at 485.13 cm^-1 , and 960.22 cm^-1 .

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