Experimental Investigation of the Thermo‐Physical Properties of Nano Calcium Carbonate Doped with Functionalized Reduced Graphene Oxide

Abstract This research investigates the influence of functionalized reduced Graphene Oxide ( f ‐rGO) on the thermo‐physical properties of nano Calcium carbonate (CaCO 3 ). The nanocomposite was developed by altering the wt. % of f ‐rGO (3 %, 4 %, and 5 %) as filler into nano CaCO 3 through an in‐house developed portable ball mill that is a novel and environmentally friendly method. Numerous characterizations were employed to determine the effect of f ‐rGO on the morphological, structural, thermal, and optical characteristics of f ‐rGO/CaCO 3 nanocomposite. The nanocomposite doped with 5 % f ‐rGO shows a minimum optical bandgap energy of 1.49 eV. Furthermore, the thermal degradation shifts toward a higher temperature range of 566–702 °C, and the crystallinity was improved by incorporating f ‐rGO into nano CaCO 3 . Nano CaCO 3 has an average crystallite size of 86.08 nm while doping f ‐rGO reduces the crystallite size to 67.99, 54.92, and 49.81 nm, respectively. Thermal conductivity improved by 40.90 %, and thermal diffusivity enhanced to 1.924 mm 2 /s when CaCO 3 was doped with 5 % f ‐rGO.