Many of the recent search on catalysis for green and sustainable fuel production have been focused on COâ photoreduction for production of renewable Fuel, since COâ photoreduction reaction has two advantages at the same time: reduces pollutant COâ gas and creates new source of fuel for the next generation power supplement. This research will continue to find an efficient, active and selective photocatalysts under visible light irradiation. Among various phothocatalysts studied thus far, TiOâ has attracted much more attention due to numerous advantages, e.g. low cost, â¦ and high band gap (3.2 eV for anatase) that provides sufficient potential for charge transfer. However, this high band gap makes TiOâ photoactive only under UV irradiation (wavelengths lower than 380 nm). Thus, recent research focuses on modifying the TiOâ structure in order to decrease its band gap and make it photoactive under visible light irradiation.
Carbon-supported TiOâ catalysts have been prepared by electrostatic self-assembly method investigated in COâ photoreduction for hydrogen-rich gas production. The activities of the catalysts were highly dependent on active metal particle size and dispersion, which in turn is affected by support type, varying in the order of graphene>SWCNT>MWCNT>activated carbon. Generally, graphene-based Pt catalysts exhibited better catalytic activity compared to other supports, resulted in higher hydrogen selectivity, hydrogen yield and stability.