Synthesis of 3D porous CeO2/reduced graphene oxide xerogel composite and low level detection of H2O2

A novel synthetic approach has been designed to prepare CeO2/reduced graphene oxide (rGO) xerogel composite. The CeO2/rGO xerogel composite electrode displays much enhanced performance for the catalytic reduction of H2O2 than the single component CeO2. The CeO2/rGO modified glassy carbon electrode displayed a wide linear range (60.7 nM-3.0 μM), and low level of detection limit (30.40 nM) for H2O2 and much higher sensitivity than that of CeO2 nanoparticles modified electrode. The sensor fabricated by the xerogel composite was fast, stable, and reliable to the detection of hydrogen peroxide.