Interface Co‐Assembly Synthesis of Magnetic Fe ₃ O ₄ @mesoporous Carbon for Efficient Electrochemical Detection of Hg(II) and Pb(II)

In recent years, efficient and porous carbon-layer-modified magnetic metal oxides demonstrate potentials for the significant improvement of catalytic adsorption performance. this study, a novel coreshell Fe3O4@mesoporous carbon (Fe3O4@MPC) nanochain electrochemical sensor is constructed by using resorcinol-formaldehyde resin Fe3O4 nanospheres as shell precursor core, respectively, with simple emulsion self-assembly strategy. Microstructural characterizations revealed that exhibited mesopore distribution ≈40 nm diameter embedded into ≈280 nm. The introduction mesoporous layer increased electrical conductivity active material maintained properties Fe3O4. synergistic effect beneficial to electrochemically detect heavy ions (HMIs). Under optimal conditions, typical Fe3O4@MPC-2/GCE excellent sensing detecting Hg(II) Pb(II), limits detection (LOD) 7.8 12.1 (S/N = 3), respectively. These good results are attributed Fe3O4@MPC structure relatively high specific surface area. This study provides method prepare composites constructing sensitive sensors monitor water quality.