Effect of calcination temperature and polyvinylpyrrolidone on LTB nanoparticle characteristics prepared by a wet chemical method

Lithium tetraborate (LTB) nanoparticles (NPs) were synthesized via a wet chemistry method at different value of PVP (0.009, 0.018 and 0.027 mol), under variety of temperatures (500, 600, 650, 700, 750, 800, and 850 0C). Thermal stability of LTB-NPs were done by TGA, DTG, and DSC. The formed crystal structure of LTB-NPs was characterized from XRD. They showed tetragonal phase with preferred (112) orientation with an average size of 4.85nm. The band gap of the powder was obtained in the visible range between 5.2 and 5.4 eV. LTB-NPs demonstrated indirect allowed transitions. The results demonstrated acceptable blue shift, highly monodispersed, and desirable particle size by 0.027 mol of PVP and 750 0C.