Facile one pot hydrothermal synthesis of reduced graphene oxide-tin disulfide (rGO-SnS2) nanohybrid material and their optical and structural investigation

Abstract

Here, we follow a simple, cost effective, and environmentally friendly one step hydrothermal method for the synthesis of nanohybrid material reduced graphene oxide-tin disulfide (rGO-SnS2). Herein, the spectroscopic and structural investigation of SnS2 anchored reduced graphene oxide (rGO) such as UV-vis DRS spectroscopy, photoluminescence (PL) spectroscopy, fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) are studied. A broad peak observes at 365 nm in UV-vis DRS spectra. Optical band gap energy is calculated using Tauc’s plot and the estimated values are 1.96 and 3.91 eV, respectively. Functional groups such as Sn-S, Sn-O, C = C,-OH, C-H, C-O are identified using FTIR which attributes to the successful preparation of nanohybrid material. Structural analysis is done using XRD. XRD result confirms the hexagonal phase of the nanohybrid material and the peak at 2θ = 15.19° confirms the characteristics of SnS2 and a small peak at 2θ = 26.03° indicates the existence of carbon. Interplanar spacing is calculated from Bragg’s law. The value is estimated to be 5.82 Å. Average crystallite size of the material is estimated using Scherrer’s formula and the value is found to be 28.16 nm. Strain of the material is calculated from Williamson-Hall plot and the value is estimated to be 0.00086.