Nickel hexacyanoferrate nanoparticlesano silver coated multiwalled carbon nanotubes nanocomposite for the detection of hydrogen peroxide

摘要

A new nanocomposite was developed by combination of nickel hexacyanoferrate nanoparticles (NiNP) and nano silver coated multiwalled carbon nanotubes (nano Ag-MWNTs). The NiNPano Ag-MWNTs nanocomposite was charactered by scanning electron microscopy (SEM). The NiNPano Ag-MWNTs nanocomposite modified glassy carbon (GC) electrode was used to investigate the electrochemical reduction of hydrogen peroxide. The results showed that NiNP and nano Ag-MWNTs provided the synergistic effect toward this process. The obtained NiNPano Ag-MWNTs/GC electrode showed a wide linear response range of 1 × 10~(-6) to 1 × 10~(-4) and 5 × 10~(-4) to 0.01 M hydrogen peroxide with correlation coefficients of 0.998 and 0.997, fast response time (2 s), and good selectivity toward the electrocatalytic reduction of hydrogen peroxide. The detection limit (S/N = 3) of hydrogen peroxide was 5 × 10~(-7) M.