Electrocatalytic application for gold nanoparticles decorated sulfur-nitrogen co-doped graphene oxide nanosheets and nanosized cobalt tetra aminophenoxy phthalocyanine conjugates

作者: Munyaradzi Shumba , Tebello Nyokong

DOI: 10.1016/J.ELECTACTA.2017.03.154

关键词: Inorganic chemistryChemistryOxideColloidal goldAdsorptionCobaltPhthalocyanineDetection limitGrapheneNanorod

摘要: Abstract Sulfur and nitrogen affinity for gold is utilized to self-assemble nanorods (AuNRs) on S, N doped or S/N co-doped graphene oxide nanosheets (SGONS/AuNRs, NGONS/AuNRs SNGONS/AuNRs) enhancement of the electrocatalytic activity nanosized cobalt tetra aminophenoxy phthalocyanine (complex 1 ) towards hydrogen peroxide detection. Of electrodes containing AuNRs, 1- SNGONS/AuNRs-GCE gave lowest limits detection (LOD) 0.012 μM followed by SGONS/AuNRs-GCE AuNRs-SNGONS(seq)-GCE both with LOD 0.016 μM. This work shows that in absence GONS (when AuNRs are alone presence /AuNRs-GCE), unfavorable obtained doping important improving LOD. showed concentration dependent mechanisms resulting two adsorption Gibbs energies (ΔG o −18.55 kJ mol −1 −17.35 kJ mol at high low concentrations, respectively.

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