Synthesis of novel nano- glass systems doped with bismuth oxide via structural, physical, FTIR, thermal and optical characteristics: Experimental Investigation

Abstract

A novel bismuth borosilicate glass specimen was synthesized utilizing the conventional melt-quench technique. The molar volume and density of glasses were measured to examine their structure. As the mole percentage of Bi₂O₃ increases, the molar volume decreases linearly. The physical attributes are analyzed, encompassing polaron radius, inter-ionic distance, oxygen packing density, and ionic concentration. The packing density of oxygen diminishes with an increase in Bi₂O₃ concentration. As the concentration of Bi₂O₃ increases, the polaron radius, or inter-ionic distance, diminishes while the ionic concentration escalates. XRD, DSC, FTIR, Raman, ultrasonic, photoluminescence and optical absorption spectrum analyses were employed to investigate the influence of different modifier oxides on the structural and optical properties of the synthesized glasses. XRD analysis was employed to characterize the synthetic glass specimens and confirm their amorphous nature. In the glass network, several modifier oxides exhibited a significant reduction and increase in T_g and thermal stability, as determined by DSC analysis. TEM confirmed the existence of multiple novel quantum dots (QDs), which are semiconductor nanoparticles whose optical and electrical characteristics depend on their size and composition (1.5–10 nm in size). The optical absorption spectra of glass samples have confirmed the reduction in both direct and indirect optical band gap values with the addition of various modifier oxides. The FT-IR spectra of the glass specimens indicated that the glass matrix comprised the structural units BiO₃, BiO₆, CaO₄, BO₃, and BO₄. FTIR spectra measurements was in good agreement with XRD and TEM spectrum analysis The nano glass particles are round and exist in various cluster sizes ranges from 1.5 to 10 nm, as demonstrated by TEM images. The results demonstrated the applicability of newly developed glass systems in photonics.