Reduced graphene oxide–MgTiO3 hybrid nanomaterial for energy storage, degradation of congo red dye and antimicrobial agent against Staphylococcus aureus and Escherichia coli bacterial strains
M. Sriramraj, A. R. Balu, S. Chitra Devi, B. Sowmiya Devi, M. Suganya, K. Devendran, M. Karthika, S. Adityan
Abstract
One-pot green synthesis was employed to prepare rGO decorated MgTiO 3 perovskite. To reduce graphene oxide Solanum trilobatum leaf extract was used. MgTiO 3 nanoparticles prepared by chemical precipitation have been compared to rGO decorated MgTiO 3 nanoparticles for structural, optical, catalytic, electrochemical, and antibacterial properties. Rhombohedral structure was confirmed from the XRD analysis. Crystallite size of MgTiO 3 got reduced from 52 nm to 21 nm with rGO induction. rGO embedded MgTiO 3 exhibits grains with well defined boundaries. There's a 2.79 eV band gap for MgTiO 3 and 2.71 eV for MgTiO 3 embedded with rGO. MgTiO 3 ‘s PL intensities quenched with rGO incorporation. Photodegradation efficiency against Congo red dye of MgTiO 3 increased from 76.8 % to 87.6 % with rGO incorporation. Distinctive anodic and cathodic peaks demonstrate the pseudo-capacitive nature of both samples from CV curves. Specific capacitance of MgTiO 3 increased from 72.6 to 117.8F/g with rGO incorporation. Adding rGO to MgTiO 3 increased its antibacterial activity.