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Fabrication of branched-TiO2 microrods on the FTO glass for photocatalytic reduction of Cr(VI) under visible-light irradiation
摘要： It is important to prepare a visible-light responsive photocatalyts, which has enhanced absorbance in the range of visible-light. In addition, metal nanoparticles deposited on TiO2 induced the localized surface plasmon resonance (LSPR) effect of Au nanoparticles (AuNPs), and thus enhanced the photocatalytic activity. Herein, TiO2 microrods with nano-branch (B-TiO2) on the fluorine-doped tin oxide glass (FTO) was prepared by hydrothermal method, and AuNPs was deposited on the B-TiO2. Its photocatalytic activity was evaluated by reduction of toxic Cr(VI) to less-toxic Cr(III) under visible-light irradiation. AuNPs/B-TiO2/FTO was successfully photocatalytic reduced target ions and Cr(III) ions were also removed from aqueous phase.
关键词： reduction of Cr(VI),TiO2,Photocatalyst,FTO glass,visible-light-driven
更新于2025-09-19 17:15:36
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Synthesis of N-F-codoped TiO2/SiO2 nanocomposites as a visible and sunlight response photocatalyst for simultaneous degradation of organic water pollutants and reduction of Cr (VI)
摘要： A new N-F-codoped TiO2/SiO2 nanocomposite was prepared by simple sol-gel method, and strongly stabilized on a substrate used in a fabricated photoreactor. The prepared photocatalysts were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, diffuse re?ectance UV/Vis, photoluminescence, ?eld emission scanning electron microscope, energy dispersive X-ray, transmission electron microscope, and N2 adsorption/desorption methods. The effective parameters of pH, ?ow rate of the incoming current, and the photoreactor tubes angle against sunlight were optimized. The photocatalytic performance of prepared photocatalysts was evaluated by studying the simultaneous removal of a mixture containing three azo dyes and Cr (VI) in the fabricated continuous-?ow photoreactor under visible and solar irradiation. The performance of the designed system was also proved under various outdoor climate conditions. Total organic carbon and ?ame atomic absorption spectroscopy analysis were performed on the treated sample to con?rm the decontamination of the model pollutant mixture. It was found that doping N and F in TiO2/SiO2 nanoparticles caused least agglomeration, enhanced activity under visible and solar irradiation, and fully anatase crystalline structure in the as-synthesized nanoparticles.
关键词： Titanium dioxide,N-F-codoped,Reduction of Cr (VI),Organic water pollutants,Photocatalysis
更新于2025-09-09 09:28:46