Synthesis of MnS/MnO Decorated N, S-Doped Carbon Derived from a Mn(II)-Coordinated Polymer for the Catalytic Oxidation of H2O2 and Bisphenol A

A way to synthesize a Mn2+- coordinated polymer precursor ligated by sulfur atoms with acetate counter ions (Mn-DTOGA) is proposed, which is achieved by an imine formation reaction between dithiooxamide and glutaraldehyde in the presence of manganese (II) acetate. MnS/MnO decorated N, S-doped carbon nanoparticles (MnS/O-SNC) are then prepared by calcination of the Mn ion-coordinated polymer for the practical applications of catalytic reactions. The Mn-DTOGA and MnS/O-SNC structures prepared at different temperatures (700, 800, and 900 degrees C) are characterized using various physical and electrochemical and chemical analyses. The nanoparticles prepared at 900 degrees C reveal the best performance for the catalytic oxidation of Hydrogen peroxide (H2O2) and bisphenol A. The decomposition potentials of H2O2 (1.0 mm) and bisphenol A (100.0 mu m) on the catalyst modified electrode are observed to be +0.40 and +0.15 V (versus Ag/AgCl), respectively. It is observed that the catalytic performances to the oxidation reactions are mainly related to MnO decorated outside the SNC particles compared to MnS formed inside the particles. The electrode reveals a wide dynamic range with the low detection limits for H2O2 (0.08 (+/- 0.02) mu m) and bisphenol A (0.17 (+/- 0.04) mu m). This study will provide essential clues for the future catalyst design.