▎ 摘　　要

In the present work, we have prepared an ecofriendly reduced graphene oxide decorated copper(II) ethylenediamine complex ([Cu(en)(2)](2+)) (en = ethylenediamine) modified glassy carbon electrode (GCE) for the electrochemical detection of hydroquinone (HQ). The as-prepared composite was characterized by SEM, EDX, XRD, UV and FT-IR. Moreover, the electrochemical behaviour of the modified electrode was investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). In addition, the GCE/RGO/[Cu(en)(2)](2+) modified electrode has excellent electrocatalytic activity towards the detection of HQ. Under the optimized conditions, the proposed sensor exhibited a wide linear detection response range of 0.1 mu M-104 mu M with a limit of detection of 0.025 mu M and a sensitivity of 5.0763 mu A mu M-1 cm(-2). Furthermore, the fabricated electrode exhibited acceptable reproducibility, repeatability and stability. On the other hand, the GCE/RGO/[Cu(en)(2)](2+) modified electrodes have been applied for the real sample analysis in environmental water samples, which exhibit acceptable recovery. Hence, it is suggested that the GCE/RGO/[Cu(en)(2)](2+) modified electrode is a potential electrode material that can be used for the detection of HQ in different real samples.