Preparation and Characterization of melt derived CaO-Sb2O3-Li2O containing borate glass for multiple application

Abstract

The antimicrobial efficiency, structural, optical, and electric transport properties of glasses of composition xCaO.10Li2O.20Sb2O3.(70-x)B2O3 (x = 0,2.5,5,7.5 and 10 mol%) and the role of CaO have been studied in this work. The amorphous phase of the glasses was confirmed through an X-ray diffraction study. The optical bandgap energy (Eopt) was decreased with the addition of CaO, whereas, the refractive index values were increased. Urbach energy (∆E) of the glasses varied from 0.32 to 0.48 eV. Density (ρ) of the studied glasses was found to increase from 3.38 g/cm3 to 3.77 g/cm3 with CaO content. Antibacterial efficiency of the glasses was examined through a well plate method against Escherichia Coli., Salmonella in terms of zone of inhibition and it is increasing with CaO content. Glass transition temperature (Tg) was decreased with increasing CaO content. NBOs play an significant role in achieving the higher order ionic conductivity. Due to the presence of Li2O, Cole-Cole impedance plots exhibited semicircular behavior at high temperatures. FT-IR studies confirms the vibrations of B-O, B-O-B with B-O-Sb linkages in the glass.