Nano-sized Ga2-xCuxZr2-xWxO7 for Malachite green decolorization under visible light

Nasr, Rabab A.; Abbas, Hussien A.; Khalaf, Aya; Bozeya, Ayat; Jamil, Tarek S.

doi:10.5004/dwt.2020.25316

Cited by 5 publications

(6 citation statements)

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“…This can be attributed to the difference in the ionic radii between Fe 3+ ions (ionic radius ls = 55 pm) and Er 3+ ions (ionic radius = 89 pm). Similar results were found by Nasr [35], who prepared Ga −x Cu x Zr 2−x W x O 7 photocatalysts.…”

Section: Photocatalysis Characterizationssupporting

confidence: 88%

“…The reason for the decrease in the band gap upon increasing the concentrations of Cu and W might be due to the W forming an energy level below the conduction band, while Cu and Fe formed energy levels above the valence band (Figure 5). When co-doping Ga2Zr2O7 with W and Cu, similar results were obtained by Nasr [35], who attributed this to the formation of new energy levels.…”

Section: Photocatalysis Characterizationssupporting

confidence: 78%

“…There were slight variations in the calculated parameters for the different prepared catalysts, which first decreased and then increased upon co-doping (i.e., the co-doping starts to be effective as the concentration of Cu and W increases). The Zr 4+ ions (ionic radius = 72 pm) are expected to be substituted by the smaller W 6+ ions (ionic radius = 60 pm) [35], while the Fe 3+ ions (ionic radius ls = 55 pm) are expected to be substituted by the larger Cu 2+ ions (ionic radius = 73 pm) [36]. The increase in the parameters as the concentrations of Cu and W increase might be due to the difference between the ionic radii of Zr 4+ and W 6+ ions being smaller than that between Fe 3+ and Cu 2+ ions (Table 2).…”

Section: Photocatalysis Characterizationsmentioning

confidence: 99%

“…The degradation of CF was enhanced with the catalyst dose up to 1.5 g/L (80% CF removal), due to the increase in the number of active sites for degradation, in addition to the generation of more free electrons in the conduction band during photocatalysis [41]. The degradation efficiency decreased at a higher dose as a result of higher solution turbidity, which negatively affected the penetration of light [35]. Moreover, it is expected that a high concentration of photocatalysts may result in particle aggregation, causing a reduction in the number of surface-active sites; consequently, there will be a decrease in the degradation efficiency [42].…”

Section: The Effect Of Catalyst Dosementioning

confidence: 99%

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Photodegradation of Carbol Fuchsin Dye Using an Fe2−xCuxZr2−xWxO7 Photocatalyst under Visible-Light Irradiation

et al. 2021

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Fe2−xCuxZr2−xWxO7 (x: 0, 0.05, 0.015) nanoparticles were synthesized following the Pechini method and characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), and diffuse reflectance spectroscopy (DRS) measurements to be used as photocatalysts in colored water remediation. All of the prepared materials were crystallized in a cubic fluorite phase as the major phase. The band gap was reduced upon doping with W6+ and Cu2+ from 1.96 eV to 1.47 eV for Fe1.85Cu0.15Zr1.85W0.15O7. Carbol fuchsin (CF) dye was used to determine the photocatalytic degradation efficiency of the prepared catalysts. Degradation efficiency was directly proportional to the dopant’s concentration. Complete removal of 20 mg/L CF was achieved under optimal conditions (pH 9, and catalyst loading of 1.5 g/L) using Fe1.85Cu0.15Zr1.85W0.15O7. The degradation rate followed pseudo-first-order kinetics. The reusability for photocatalysts was tested five times, decreasing its efficiency by 4% after the fifth cycle, which indicates that the prepared Fe1.85Cu0.15Zr1.85W0.15O7 photocatalyst is a promising novel photocatalyst due to its superior efficiency in dye photodegradation.

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Section: Photocatalysis Characterizationssupporting

confidence: 88%

Section: Photocatalysis Characterizationssupporting

confidence: 78%

Section: Photocatalysis Characterizationsmentioning

confidence: 99%

Section: The Effect Of Catalyst Dosementioning

confidence: 99%

See 2 more Smart Citations

Photodegradation of Carbol Fuchsin Dye Using an Fe2−xCuxZr2−xWxO7 Photocatalyst under Visible-Light Irradiation

et al. 2021

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“…It may be due to the creation of the new species of dye. [40][41][42] Consequently, pH 9 is the optimal value.…”

Section: The Impact Of Phmentioning

confidence: 99%

Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

Ismail

Nasr

2021

J of Applied Polymer Sci

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Structural, optical and photodegradation performance of PVDF/PVA polymer blend doped with different concentration of NiO NPs were studied using casting technique method. The effect of adding NiO NPs on PVDF/PVA are investigated using X-ray Diffraction (XRD), High Resolution Transmission Electron Microscope (HRTEM), Fourier Transform Infrared-Attenuated Total Reflection (FTIR-ATR), Ultraviolet-Visible Spectroscopy (UV-Vis), and High Resolution Scanning Electron Microscope (HRSEM). XRD results showed that the addition of NiO NPs increase the crystallinity of PVDF/PVA. The appearance and shifting of bands in FTIR-ATR indicate the structural change in the PVDF/PVA with adding NiO NPs combined with decrease in the band gap of nanocomposite films compared to pure blend in UV-Vis confirmed the incorporation of NiO NPs in PVDF/PVA. HRTEM shows

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Improving of photocatalytic activity of barium ferrate via bismuth and copper co-doping for degradation of paracetamol under visible light irradiation

Abbas

Nasr

Vannier

et al. 2022

Journal of Environmental Sciences

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Nano-sized Ga2-xCuxZr2-xWxO7 for Malachite green decolorization under visible light

Cited by 5 publications

References 0 publications

Photodegradation of Carbol Fuchsin Dye Using an Fe2−xCuxZr2−xWxO7 Photocatalyst under Visible-Light Irradiation

Photodegradation of Carbol Fuchsin Dye Using an Fe2−xCuxZr2−xWxO7 Photocatalyst under Visible-Light Irradiation

Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

Improving of photocatalytic activity of barium ferrate via bismuth and copper co-doping for degradation of paracetamol under visible light irradiation

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