Synthesis of CeO₂-reduced graphene oxide nanocomposite for display and latent fingerprint application

We report the synthesis of CeO₂-rGO nanocomposites by hydrothermal method for display and forensic applications. The prepared CeO₂/rGO nanocomposites were subjected to powder X-ray diffraction (PXRD), Scanning Electron Microscopy (SEM), Field Emission Scanning Electron Microscopy, UV–Visible spectroscopic analysis, Photoluminescence study (PL), and Fourier-transform infrared analysis (FTIR). The PXRD image reveals cubic in structure. The SEM image reveals spherical structure of nanocomposites. The energy bandgap of nanocomposites is found to be 2.94 eV using optical absorption study. FTIR spectroscopy analysis showed the purity of synthesized specimens.The PL of nanocomposites shows three prominent emission peaks at 425, 512, and 594 nm. The observed Commission Internationale de I’Eclairage (CIE) results were found to be near white region. The charge-transfer kinetics were investigated through electrochemical impedance spectroscopy. A CeO₂-rGO composite was found to be a substitute to luminescent powder for protected discovery and subjective improvement of latent fingerprints kept onto glassplate.