▎ 摘　　要

Exploration of the novel and proficient nanostructured material for the utilization of energy and environmental applications is a major concern to the researchers. Herein, we fabricated sphere-like copper tungstate (CuWO4) anchored on graphene oxide nanocomposite (CuWO4-GO NCs) via simple hydrothermal treatment followed by sonication progress. The successful formation of CuWO4-GO nanocomposite was confirmed by various spectroscopic techniques including XRD, SEM, TEM, EDX, DRS-UV and XPS analysis. For the first time, the as-prepared CuWO4-GO NCs were utilized as a bifunctional catalyst for the photodegradation of ciprofloxacin (CF) and electrocatalytic oxidation of methanol. The UV-Visible spectroscopy results portrayed that the CuWO4-GO NCs degrade above 97% of CF aqueous suspension after 60min of visible light irradiation with good repeatability and stability. Moreover, the CuWO4-GO NCs demonstrates excellent electrocatalytic performances towards the oxidation of methanol in an alkaline medium. In addition, the dielectric properties of the CuWO4-GO NCs were also analyzed and the results are well satisfied. The improved photocatalytic, electrocatalytic and electrical conductivity of CuWO4-GO NCs could ascribe to the strong electrostatic interaction between the CuWO4 and GO.