3D porous graphene/double-walled carbon nanotubes/gold nanoparticles hybrid film for modifying electrochemical electrode

[Display omitted] •A novel approach to prepare 3D porous Gr/DWCNTs/AuNPs hybrid film was proposed.•The 3D porous film was formed due to the presence of SDC surfactant.•The 3D porous film was used for modifying electrochemical electrode.•The active surface area of modified electrode was enhanced by 3D porous film. 3D porous graphene/carbon nanotubes (Gr/CNTs) hybrid films containing nanoparticles have introduced new possibilities for the development of high-performance electrochemical sensors. Herein, we developed a novel technique for the fabrication of 3D porous graphene/double-walled carbon nanotubes/gold nanoparticles (Gr/DWCNTs/AuNPs) hybrid film on copper foils by using the thermal chemical vapor deposition (CVD) method. On these porous films, DWCNTs, Gr winkles, and a homogeneous AuNP covering were observed. These prepared 3D porous films were then transferred onto the surface of screen-printed electrodes (SPE) to investigate the electrochemical properties by using cyclic voltammetry (CV) technique. Consequently, 3D porous Gr/DWCNTs/AuNPs film modified electrodes exhibited good electrochemical characteristics with an active surface area of 2.76 times higher than that of Gr/DWCNTs film. This is due to the use of AuNPs, which improves the conductivity and surface area of the porous film.