Synthesis and in vitro bioactivity of SiO2-CaO-Na2O glass using bio-waste resources

Abstract

The present paper describes the synthesis and in vitro bioactivity of SiO2-CaO-Na2O bio-glass using bio-waste. Rice husk ash (RHA) and eggshells bio-waste have been used as resources for extracting the silicon dioxide and calcium oxide respectively. Glass samples were obtained by standard melt-quenching technique. The bioactivity was assessed using in vitro studies in simulated body fluid (SBF). The nucleation and growth of hydroxyapatite were confirmed using XRD, FTIR and SEM-EDS characterizations. XRD have confirmed the phase of hydroxyapatite, well matched with its standard JCPDS data. FTIR spectra reveal the apparent silicate stretching, bending vibration modes and phosphate absorption bands. Surface morphology has been observed using SEM images resulting globular shape of hydroxyapatite formed. And, the chemical constituents of apatite such as Ca and P have been confirmed by EDS spectra. These results perfectly established that, RHA and eggshells are potentially beneficial sources for producing bio-glasses.