Po rous ceria(CeO_(2)) nanoparticles and iron-doped porous ceria with different iron co ntents(1 wt%,2.5 wt%,5 wt% and 10 wt%) were prepared using a one-pot simple process.Several characterization techniques were appl...Po rous ceria(CeO_(2)) nanoparticles and iron-doped porous ceria with different iron co ntents(1 wt%,2.5 wt%,5 wt% and 10 wt%) were prepared using a one-pot simple process.Several characterization techniques were applied to characterize the prepared materials,including inductively coupled plasma(ICP)ele mental analysis,X-ray diffraction(XRD),Fourier transform infrared(FTIR),N_(2) sorption measure ments,scanning electron microscopy(SEM),high resolution-transmission electron microscopy(HR-TEM),and DR-UV-Vis.The obtained results confirm the incorporation of iron ions in the CeO_(2) lattice,with no evidence for the formation of iron oxide as a separate phase.More importantly,the light absorption property of Fe-doped porous ceria samples is found to be red-shifted and the calculated bandgap decreases from 3.08 to 2.66 eV for pure porous ceria and 10 wt% Fe-doped ceria,respectively.Under the illumination of visible light,the photocatalytic activity of Fe-doped porous ceria was investigated through the decolourization reaction of methyl green aqueous solution as a model contaminant in industrial wastewater.The obtained photocatalytic data show a remarkable increase in activity by almost4.8 times higher compared to a pure ceria sample.Furthermore,the prepared Fe-doped ceria sample exhibits good reusability up to the fourth consecutive reaction without treatment.Moreover,the bestperforming sample was further investigated in two additional photocatalytic reactions;the first is the elimination of phenol in an aqueous solution,while the second is the degradation of a gas mixture containing four short-chain hydrocarbon gases.The results of both reactions confirm the great improvement in the photocatalytic performance of Fe-doped porous ceria compared to a pure porous ceria sample.展开更多
基金the Deanship of Scientific Research at King Khalid University,Saudi Arabia,for funding support through large group Research Project under Grant No. RGP2/236/44。
文摘Po rous ceria(CeO_(2)) nanoparticles and iron-doped porous ceria with different iron co ntents(1 wt%,2.5 wt%,5 wt% and 10 wt%) were prepared using a one-pot simple process.Several characterization techniques were applied to characterize the prepared materials,including inductively coupled plasma(ICP)ele mental analysis,X-ray diffraction(XRD),Fourier transform infrared(FTIR),N_(2) sorption measure ments,scanning electron microscopy(SEM),high resolution-transmission electron microscopy(HR-TEM),and DR-UV-Vis.The obtained results confirm the incorporation of iron ions in the CeO_(2) lattice,with no evidence for the formation of iron oxide as a separate phase.More importantly,the light absorption property of Fe-doped porous ceria samples is found to be red-shifted and the calculated bandgap decreases from 3.08 to 2.66 eV for pure porous ceria and 10 wt% Fe-doped ceria,respectively.Under the illumination of visible light,the photocatalytic activity of Fe-doped porous ceria was investigated through the decolourization reaction of methyl green aqueous solution as a model contaminant in industrial wastewater.The obtained photocatalytic data show a remarkable increase in activity by almost4.8 times higher compared to a pure ceria sample.Furthermore,the prepared Fe-doped ceria sample exhibits good reusability up to the fourth consecutive reaction without treatment.Moreover,the bestperforming sample was further investigated in two additional photocatalytic reactions;the first is the elimination of phenol in an aqueous solution,while the second is the degradation of a gas mixture containing four short-chain hydrocarbon gases.The results of both reactions confirm the great improvement in the photocatalytic performance of Fe-doped porous ceria compared to a pure porous ceria sample.
