GREEN SYNTHESIS AND THERMO, OPTICAL PROPERTIES OF M2P2O7 [M= Ca AND Co] NANOPARTICLES

Abstract

Nano size biomaterials have attracted much attention in material sciences, because of their potential
applications and advantages over various chemical and physical approaches. The utilization of biological
materials as reducing and capping agent in the synthesis process has proven to be eco-friendly, easy,
cost- effective, efficient and non-hazardous. In the present study, we reported an eco-friendly green
synthesis of M2P2O7 [M= Ca and Co] nanoparticles using a leaf extract of Ocimum sanctum. L under
microwave irradiation followed by annealing at 700 oC for 3 h. The nanostructures of the annealed
pyrophosphate samples were characterized using powder X–ray diffraction (PXRD), Fourier transform
infrared spectrum (FTIR), scanning electron microscopy (SEM), Energy dispersive x-ray spectroscopy
(EDXS), UV-Visible analysis, and Thermo gravimetric analysis (TGA). The Crystalline nature and size of
M2P2O7 were studied using powder XRD and the size of nanoparticles found as 55 nm and 33 nm. The
biosynthesis of M2P2O7 nanoparticles by using O. sanctum is easy and eco-friendly. In addition, the band
gap energy of Ca2P2O7 and Co2P2O7 nanoparticles calculated to be 7.5 eV and 4.25 eV. It is concluded
that the green synthesis plays an important role in the reduction of meal ions using O. sanctum leaf
extract due to the presence of phenolic compounds.