Hydrogen photoproduction on TiO2-reduced graphene oxide hybrid materials from water-ethanol mixture

Titanium dioxide mixed with reduced graphene oxide (rGO) has been tested in the photoproduction of hydrogen using UV light from water-ethanol combination in gas phase. The presence of the reduced graphene oxide in TiO2/rGO nanocomposites affects the physicochemical properties of hybrid materials, thus enhancing the photocatalytic activity. The obtained catalysts have been characterized for physical-chemical properties using X-ray diffraction (XRD), UV-vis spectroscopy, Raman spectroscopy, transmission electron microscopy (TEM)/highresolution transmission electron microscopy (HRTEM), and Brauner Emmett Teller (BET). The best photocatalyst has been obtained by mixing anatase and rGO (10 wt%) after calcination at 700 degrees C. This TiO2-rGO composite exhibited the highest performance with a hydrogen photogeneration rate of 9.5 mmol h-1 g-1.

Automated summary

A mixture of titanium dioxide and reduced graphene oxide was tested in the photoproduction of hydrogen using UV light in a gas phase water-ethanol combination. The addition of reduced graphene oxide enhanced the photocatalytic activity, with the best catalyst being a TiO2-rGO composite.