CVD growth of large-area graphene over Cu foil by atmospheric pressure and its application in H2 evolution

• Large area graphene was successfully synthesized via CVD techniques.
• The layers of graphene can be confirmed from HRTEM images.
• Homogenous distribution of TiO2 nanoparticles were observed.
• Enhanced hydrogen evolution was found from aqueous solution by using sacrificial reagents.

This study reports that the atmospheric pressure chemical vapor deposition (CVD) growth of large area graphene (LAG) over a Cu foil. The obtained large area graphene was further decorated with TiO2 nanoparticles via ultrasonic method. The surface structure, crystal phase, and elemental identification of these obtained LAG/TiO2 composite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX) analysis, and Raman spectra. The photocatalytic H2 evolution result illustrates Cu-LAG/TiO2 has been found to be a potential catalyst for conversion of solar energy to clean hydrogen energy under visible light-driven despite that the H2 evolution activity is not high enough in this stage.

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