Novel nanostructured-TiO2 materials for the photocatalytic reduction of CO2 greenhouse gas to hydrocarbons and syngas

摘要: Abstract In the current work an attempt has been made to synthesize novel high surface area nano-TiO2 materials (titanium dioxide nanoparticles/TNPs and nanostructured or mesoporous titanium using KIT-6 silica template/Meso. TiO2) in order establish photocatalytic reduction of CO2 greenhouse gas presence H2O vapor produce hydrocarbons syngas. The synthesized have characterized through N2-adsorption/desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) ultraviolet–visible (UV–Vis) spectroscopy analysis techniques. TNPs consists average 11 nm TiO2 particles, shows a higher 151 m2/g than commercial Aeroxide P25 (53 m2/g), also demonstrates enhanced adsorption capacity. However, Meso. shown (190 m2/g) mesoporosity (4 nm pores) TiO2, as confirmed by characterizations. reaction, with capability, due smaller nano-sized particle morphology, showed syngas (CO, H2) production TiO2. more (CH4, CH3OH) together better reaction kinetics stability its characteristics key parameters that affect activity optimized increase fuel production. mechanism indicates competitive vapors on catalyst surface. including UV light source intensity, H2O/CO2 ratios shapes influence catalytic performance, therefore, these products. Partial saturation active sites oxygen produced are possible causes deactivation, however, catalysts can be regenerated quickly simple evaporation technique.