Bioactive glass containing SiO2-CaO-P2O5 (BGLi0) and SiO2-CaO-P2O5-Li2O (BGLi5) (mol %) were
synthesized through a quick alkali-mediated sol–gel method as previously reported by Yi-Fan Goh et.al [16]and
their composition is depicted in Table-1 The tetraethyl orthosilicate, distilled water (1:2) and 2M nitric acid (as a
hydrolysis catalyst to adjust the pH at 2), were successively added and the mixture was allowed to react for 1 hr
under continuous stirring for the acid hydrolysis of TEOS. This was followed by the addition of TEP, Ca (NO3)
2·4H2O, LiNO3, allowing 30 min for each reagent to reacts completely. After the final addition, whole mixture
was allowed 1 hr stirring to obtain a clear sol. Excess Ammonia (2M) solution (a gelation catalyst) was added
into the sol in an ultrasonic water bath until gelation results. The mixture was then agitated with glass rode (like
as mechanical stirrer) to prevent the formation of a bulk gel. Finally, each prepared gel was dried at 75°C for 2
days in an air oven, followed by sintering at constant heating rate of 10 °C min-1
in muffle furnace up to 700°C
for 2hrs