Microplasma-assisted construction of cross-linked network hierarchical structure of NiMoO nanorods @NiCo-LDH nanosheets for electrochemical sensing of non-enzymatic HO in food.

The accumulation of small doses of hydrogen peroxide (HO) into food can cause many diseases in the human body, and it is urgent to develop efficient detection methods of HO. Herein, the hierarchical structure composite of NiCo-LDH nanosheets crosslinked NiMoO nanorods was grown in situ on carbon cloth (NiMoO NRs@NiCo-LDH NSs/CC) by micro-plasma assisted hydrothermal method. Thanks to the synergistic effect of three metals and (NiMoO NRs@NiCo-LDH NSs/CC) provided by nanorods/nanosheets hierarchical structure, NiMoO NRs@NiCo-LDH NSs/CC exposes more active sites and achieves rapid electron transfer. The HO electrochemical sensor was constructed as the working electrode with a linear range of 1 μmol L to 9.0 mmol L and detection limit of 112 nmol L. In addition, the sensor has been successfully applied to the detection of HO in food samples, the recovery rate is 95.2%-106.62%, RSD < 4.89%.