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Decolorization of crystal violet using nano-sized novel fluorite structure Ga2Zr2-xWxO7 photocatalyst under visible light irradiation

Citation

Nasr, Rabab et al. (2020), Decolorization of crystal violet using nano-sized novel fluorite structure Ga2Zr2-xWxO7 photocatalyst under visible light irradiation, Dryad, Dataset, https://doi.org/10.5061/dryad.zpc866t54

Abstract

Fluorite type Zr based oxides with the composition Ga2Zr2-xWxO7 (x=0, 0.05, 0.1 and 0.15) were prepared using the citrate technique. Appropriate characterizations for all prepared materials were carried out. XRD clarified that all the undoped and W doped Ga2Zr2O7 samples were crystallized in the cubic fluorite phase structure. The average particle size of the prepared samples was in the range (3-8 nm). The lowest band gap (1.7 eV) and the highest surface area (124.3 m2/g) were recorded for Ga2Zr0.85W0.15O7. The Photocatalytic impacts of the prepared systems were studied by removal of crystal violet dye (CV) employing visible illumination taking in consideration initial dye concentrations, duration of visible irradiation treatment, catalysts dose and the dopant concentration. The obtained results showed faster dye removal with the boost of the catalyst dosage. W doping shifted the absorption to the visible light range by decreasing the band gap from 4.95 eV for parent Ga2Zr2O7 to 1.7 eV for 15 mol % tungsten doped Ga2Zr2O7 enhancing the photocatalytic decolorization of CV from 4.2% to 83.6% for undoped and 15 mol% W doped Ga2Zr2O7 respectively at optimum operating conditions (pH 9, 1g L-1 catalyst dose and 300 min). Complete CV degradation was attained by assistant of 25 mmol L-1 hydrogen peroxide. The reaction is aligned to pseudo first order kinetic.

UV- visible and gas chromatography-mass spectrometry (GC-MS) studies were conducted to identify the by-products at the end of the reaction. GC-MS confirms the N-de-methylation followed by benzene ring rupture root forming short aliphatic acids.

Fluorite type Zr based oxides with the composition Ga2Zr2-xWxO7 (x=0, 0.05, 0.1 and 0.15) were prepared using the citrate technique. Appropriate characterizations for all prepared materials were carried out. XRD clarified that all the undoped and W doped Ga2Zr2O7 samples were crystallized in the cubic fluorite phase structure. The average particle size of the prepared samples was in the range (3-8 nm). The lowest band gap (1.7 eV) and the highest surface area (124.3 m2/g) were recorded for Ga2Zr0.85W0.15O7. The Photocatalytic impacts of the prepared systems were studied by removal of crystal violet dye (CV) employing visible illumination taking in consideration initial dye concentrations, duration of visible irradiation treatment, catalysts dose and the dopant concentration. The obtained results showed faster dye removal with the boost of the catalyst dosage. W doping shifted the absorption to the visible light range by decreasing the band gap from 4.95 eV for parent Ga2Zr2O7 to 1.7 eV for 15 mol % tungsten doped Ga2Zr2O7 enhancing the photocatalytic decolorization of CV from 4.2% to 83.6% for undoped and 15 mol% W doped Ga2Zr2O7 respectively at optimum operating conditions (pH 9, 1g L-1 catalyst dose and 300 min). Complete CV degradation was attained by assistant of 25 mmol L-1 hydrogen peroxide. The reaction is aligned to pseudo first order kinetic.

UV- visible and gas chromatography-mass spectrometry (GC-MS) studies were conducted to identify the by-products at the end of the reaction. GC-MS confirms the N-de-methylation followed by benzene ring rupture root forming short aliphatic acids.

Methods

the Dataset  has been collected through characterization of the prepared materials by several instruments and experimental data from the desigend experiments. All the dataset information are processed through the attached Exel sheets.

Usage Notes

Revise the functions of each sheet of the attached excel file.

No missing values, all data avalabile in excel file.  

Funding

the Science & Technology Development Fund in Egypt and the Scientific Research Support Fund in Jordan for financing that work through collaborative project number 21734 in Egypt and number Egy-Jor/1/01/2015 in Jordan., Award: project number 21734 in Egypt

the Science & Technology Development Fund in Egypt and the Scientific Research Support Fund in Jordan for financing that work through collaborative project number 21734 in Egypt and number Egy-Jor/1/01/2015 in Jordan., Award: project number 21734 in Egypt

the Science & Technology Development Fund in Egypt and the Scientific Research Support Fund in Jordan for financing that work through collaborative project number 21734 in Egypt and number Egy-Jor/1/01/2015 in Jordan., Award: number Egy-Jor/1/01/2015 in Jordan