(165b) Selective Catalytic Photoreduction of CO2 On Pt/TiO2 Nanotube for Renewable Energy

Carbon dioxide is one of the primary causes of global warming, and simultaneously, the world has to face the issue of fossil fuel shortage in the near future. One of the ideal solutions to both problems is that the selective catalytic photoreduction of CO₂ to produce high-potential carbon compounds, including CH₄, CO, CH₃OH, HCHO, HCOOH, etc.. The transformation of photo to chemical energy by a non-living photocatalyst could be more efficient than that of a bio-system, although the production of CO₂-free fuel by direct conversion of solar energy into chemical energy is still a challenge for researchers. In this work, a gas-solid heterogeneous system for selective catalytic photoreduction of CO₂ on Pt/TiO₂ nanotube for renewable energy was discussed. Low dimensional Pt/TiO₂ nanotube potocatalysts are synthesized and characterized with X-ray Diffraction, High-resolution Transmission Electron Microscopy, Photoluminescence, CO pulse Chemisorptions, N2 adsorption-desorption analysis at 77 K and X-ray Fluorescence spectrometry. The catalytic activity was tested in a fixed-bed photocatalysis reactor with the catalyst coated on the quartz plate with a 1 ìm thickness film and the CH₄ yield on the Pt/TiO₂ nanotube photocatalysts is more remarkable. It increased with the increase of the UV irradiation time and H₂O/CO₂ molar ratio, accumulating to about 26.8 µmol?h^-1?g_Ti^-1.