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

Abstract

One-pot green synthesis was employed to prepare rGO decorated MgTiO3 perovskite. To reduce graphene oxide Solanum trilobatum leaf extract was used. MgTiO3 nanoparticles prepared by chemical precipitation have been compared to rGO decorated MgTiO3 nanoparticles for structural, optical, catalytic, electrochemical, and antibacterial properties. Rhombohedral structure was confirmed from the XRD analysis. Crystallite size of MgTiO3 got reduced from 52 nm to 21 nm with rGO induction. rGO embedded MgTiO3 exhibits grains with well defined boundaries. There's a 2.79 eV band gap for MgTiO3 and 2.71 eV for MgTiO3 embedded with rGO. MgTiO3‘s PL intensities quenched with rGO incorporation. Photodegradation efficiency against Congo red dye of MgTiO3 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 MgTiO3 increased from 72.6 to 117.8F/g with rGO incorporation. Adding rGO to MgTiO3 increased its antibacterial activity.