Efficient photocatalytic CO2 reduction by visible-light responsive Fe-doped WO3 nanostructures

126-134The nanoparticles of WO3 doped with Fe ions have been employed for University, Kermanshah photocatalytic conversion of greenhouse gaseous of CO2 and CH4 under visible-light irradiation. The photocatalysts have been characterized by XRD, FESEM, EDX, Raman, UV-vis, and PL techniques. The XRD and Raman spectroscopies confirm the monoclinic structure of WO3 nanoparticles and also the successful incorporation of Fe ions into WO3 lattice. A red shift in Raman patterns of Fe-doped WO3 samples indicate the partial substitution of W with Fe ions and the structural defects induced in WO3 crystals upon doping treatment. The recorded PL signals reveal that the charge carrier recombination rate can be inhibited by doping WO3 with Fe ions. The modified samples show high activity by photons with wavelength equal to/greater than ~500 nm, the visible-light in green region. The best photocatalytic reduction of CO2 is provided to be 38.7% by WO3 containing 4.18 at.% Fe under visible-light. Ethane, and formate and acetate derivatives are detected as the major products of CO2 reduction

Efficient photocatalytic CO2 reduction by visible-light responsive Fe-doped WO3 nanostructures

The nanoparticles of WO3 doped with Fe ions have been employed for University, Kermanshah photocatalytic conversion of greenhouse gaseous of CO2 and CH4 under visible-light irradiation. The photocatalysts have been characterized by XRD, FESEM, EDX, Raman, UV-vis, and PL techniques. The XRD and Raman spectroscopies confirm the monoclinic structure of WO3 nanoparticles and also the successful incorporation of Fe ions into WO3 lattice. A red shift in Raman patterns of Fe-doped WO3 samples indicate the partial substitution of W with Fe ions and the structural defects induced in WO3 crystals upon doping treatment. The recorded PL signals reveal that the charge carrier recombination rate can be inhibited by doping WO3 with Fe ions. The modified samples show high activity by photons with wavelength equal to/greater than ~500 nm, the visible-light in green region. The best photocatalytic reduction of CO2 is provided to be 38.7% by WO3 containing 4.18 at.% Fe under visible-light. Ethane, and formate and acetate derivatives are detected as the major products of CO2 reduction

Performance of WO3 nanoparticles in photocatalytic conversion of greenhouse gases under visible light irradiation

The direct photoconversion of carbon dioxide and methane is investigated in an appropriate gas-phase batch reactor under visible light irradiation. WO3 nanoparticles coated on stainless steel webnet have used as photocatalyst. WO3 nanoparticles are synthesized and characterized by SEM, XRD, EDX, FTIR and UV-vis spectra analyses. SEM images indicate that WO3 nanoparticles were well coated on the surface of the webnet. The XRD analysis confirm monoclinic structure and average particle size about 100 nm for the WO3 nanoparticles. Also, the FTIR analysis exhibit the structure of tungsten oxide. The results of UV–vis show that the visible light absorbance spectrum of WO3 are more efficient than TiO2 and ZnO. The conversions of 28% and 13.3% for CO2 and CH4 has been found by WO3 under visible light, respectively

Performance of WO₃ nanoparticles in photocatalytic conversion of greenhouse gases under visible light irradiation

208-215The direct photoconversion of carbon dioxide and methane is investigated in an appropriate gas-phase batch reactor under visible light irradiation. WO3 nanoparticles coated on stainless steel webnet have used as photocatalyst. WO3 nanoparticles are synthesized and characterized by SEM, XRD, EDX, FTIR and UV-vis spectra analyses. SEM images indicate that WO3 nanoparticles were well coated on the surface of the webnet. The XRD analysis confirm monoclinic structure and average particle size about 100 nm for the WO3 nanoparticles. Also, the FTIR analysis exhibit the structure of tungsten oxide. The results of UV–vis show that the visible light absorbance spectrum of WO3 are more efficient than TiO2 and ZnO. The conversions of 28% and 13.3% for CO2 and CH4 has been found by WO3 under visible light, respectively