STRUCTURAL CHARACTERISATIONS AND THERMAL PROPERTIES OF POTASSIUM-ENRICHED MESOPOROUS 45S5 BIOGLASS NANOPARTICLES

This study uses the sol-gel method to explore the structural and thermal properties of synthesised potassium-doped 45S5 bioactive glass (BG) nanoparticles.The X-ray diffraction (XRD) revealed the crystalline phase of Na 2 Ca 4 (PO 4 ) 2 SiO 4 and a shift in diffraction peaks due to the potassium integration, suggesting enhanced crystallinity.Field Emission Scanning Electron Microscopy (FESEM) showed a change in particle morphology with the potassium addition, indicating modified nucleation and growth processes.The thermogravimetric analysis (TGA) demonstrated improved thermal stability in the potassium-doped samples, with reduced weight loss across all temperature ranges.The nitrogen adsorption-desorption isotherm analysis revealed an increase in the surface area from 11.54 m 2 g -1 in the BG to 11.77 m 2 g -1 in the potassiumdoped BG and a decrease in the pore volume and average pore size, indicating a significant structural change.These results highlight the potential of potassium-doped BG in biomedical applications, offering enhanced bioactivity and thermal stability.