Flower-like BiS nanostructures grown on nitrogen-doped reduced graphene oxide for electrochemical determination of hydrogen peroxide.

This paper reports a facile solvothermal method for the synthesis of BiS flower-like nanostructures grown in situ on a nitrogen-doped reduced graphene oxide (BiS@N-G) surface. Thiourea was used as the nitrogen source and reducing agent for graphene oxide. The surface morphology of the as-prepared BiS@N-G composites was analyzed by field emission scanning electron microscopy and transmission electron microscopy. The crystalline structure and surface chemical states were examined by X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The as-prepared BiS@N-G composite was deposited on a glassy carbon (GC) electrode, and the modified electrode was employed for the electrocatalytic detection of HO. The calculated diffusion coefficient and catalytic rate constant of the BiS@N-G modified electrode were 4.9 × 10 cm s and 5671 M s, respectively. The BiS@N-G/GC electrode demonstrated a wide concentration range for HO, from 10 to 42,960 μM, with a sensitivity of 0.1535 μA μM and an obtained limit of detection of 1.9 μM.