Easy processing laser reduced graphene: A green and fast sensing platform for hydroquinone and catechol simultaneous determination

A green, fast and facile approach for the preparation of graphene is proposed for constructing an electrochemical sensing platform. The fabricated platform is applied for the simultaneous determination of hydroquinone (HQ) and catechol (CC) based on laser reduced graphene (LRG) which is prepared by a consumer-grade laser pen (< $10). Scanning electron microscopy (SEM), atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS), Raman spectrum and X-ray diffraction (XRD) confirm that the synthesis of LRG could be achieved through a simple and efficient way without any chemical reducing agents and without time consuming process. The performance of LRG modified electrode shows the excellent electrocatalytic activity of LRG toward the redox reaction of HQ and CC. Under the optimized condition, the calibration curves for HQ and CC were obtained in the range of 1 to 300 μM, 2 to 300 μM, with detection limits (S/N = 3) of 0.5 μM and 0.8 μM, respectively. Therefore, our study may provide a promising sensing platform for a variety of electroanalysis applications.