Au nanoparticles and graphene quantum dots co-modified glassy carbon electrode for catechol sensing

Highlights: • The GCE was modified with gold nanoparticles and graphene quantum dots (Au-GQDs). • Au-GQDs increase electrode specific surface area and enhance electronic and catalytic properties. • The catechols were effectively detected with the new sensing platform. In this letter, the gold nanoparticles and graphene quantum dots were applied to the modification of glassy carbon electrode for the detection of catechol. The synergist cooperation between gold nanoparticles and graphene quantum dots can increase specific surface area and enhance electronic and catalytic properties of glassy carbon electrode. The detection limit of catechol is 0.869 μmol/L, demonstrating the superior detection efficiency of the gold nanoparticles and graphene quantum dots co-modified glassy carbon electrode as a new sensing platform.