(544gv) Carbonaceous Supports Decorated with Pt-TiO? Nanoparticles Using Electrostatic Self-Assembly Method As a Highly Visible Light Active Photocatalyst for CO? Photoreduction

Many of the recent search on catalysis for green and sustainable fuel production have been focused on CO₂ photoreduction for production of renewable Fuel, since CO₂ photoreduction reaction has two advantages at the same time: reduces pollutant CO₂ 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, TiO₂ has attracted much more attention due to numerous advantages, e.g. low cost, … and high band gap (3.2 eV for anatase) that provides sufficient potential for charge transfer. However, this high band gap makes TiO₂ photoactive only under UV irradiation (wavelengths lower than 380 nm). Thus, recent research focuses on modifying the TiO₂ structure in order to decrease its band gap and make it photoactive under visible light irradiation.

Carbon-supported TiO₂ catalysts have been prepared by electrostatic self-assembly method investigated in CO₂ 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.