01943nas a2200241   4500008004100000022001400041245011600055210006900171260000800240300000800248490000800256520112400264653002101388653002101409653001301430653002901443653002301472653002001495100001901515700001801534700001801552856013101570       2021                        eng d  a0947-839600aSynthesis of graphene from activated carbon at liquid nitrogen temperature and its detailed structural analysis0 aSynthesis of graphene from activated carbon at liquid nitrogen t  cMAY  a3190 v1273 a<p>The present study deals with the synthesis of graphene using thermal quenching of pre-heated activated carbon (a-C) (1370 K for 3 h) at liquid nitrogen temperature and its detailed structural analysis using XRD, TEM, FTIR and Raman spectroscopy. The analysis of lattice parameters (L-a, L-c,L- and d) of constituent nanographitic domains using XRD shows restoration of graphene-like structure in the resultant product (a-CL). TEM image reveals porosity and partially crystallinity (from SAED) in a-C. While thin layers of graphene are observed in the TEM images of a-CL Deconvoluted Raman spectra have been used to investigate the evolution of crystalline behaviour of a-C with temperature in view of Ferrari and Robertson's three-stage model. The evolution of G peak and increase in I-D/I-G reveals restoration of crystallinity in a-CL. The development of the D peak indicates disordering of graphite but ordering of amorphous carbon. The reported method is technologically beneficial for graphene synthesis for large number of applications such as supercapacitors, H-2 storage, gas separation and purification.</p>10aactivated carbon10aAmorphous carbon10agraphene10aH-2 storage applications10aRaman spectroscopy10aSupercapacitors1 aSharma, Preeti1 aSharma, Geeta1 aPunia, Rajesh  uhttps://library.ncl.res.in/content/synthesis-graphene-activated-carbon-liquid-nitrogen-temperature-and-its-detailed-structural