Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

Alkahlawy, A.A.; El‐Salamony, Radwa A.; Gobara, Heba M.

doi:10.21608/ejchem.2020.47684.2985

Cited by 2 publications

(2 citation statements)

References 57 publications

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“…These species are altered in potential power to decolorize and disintegrate any organic colored materials. Hydroxyl radical is a more active species in an aqueous solution with 2.8 V, hence it acts as a powerful oxidant to attack the dye molecules [53][54][55][56][57][58][59][60]. The suggested chlorazol black BH decolorization was displayed in figure.12 that mention in reference [17].…”

Section: E Suggested Mechanismmentioning

confidence: 99%

One-Step Hydrothermal Synthesis of α- MoO3 Nano-belts with Ultrasonic Assist for incorporating TiO2 as a NanoComposite

Obaid

Ahmed

2021

Egypt. J. Chem.

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One of the goals of this project was to utilize the hydrothermal method in preparation of α-MoO3 nano-belts as bluish power at 180 o C for 5h. This nanomaterial was incorporated with rutile-TiO2 to produce a nanocomposite photocatalyst by a direct ultrasonic method in a ratio of 0.25(α-MoO3): 9.75(TiO2) as w/w ratio. The characterized of samples found by X-ray diffraction(XRD), scan electron microscopy(SEM), and ultraviolet-visible spectrophotometry. The XRD analysis and SEM image for prepared α-MoO3 are proved the α-MoO3 is prepared as a nano-belts, but its composite is being as spherical with elevated if roughness of its surface after incorporation. The bandgap of α-MoO3 nanobelts increased from 2.8 eV to 2.95 eV after fabrication it surfaces with rutile-TiO2 that attitude to the small Mo 6+ ion incorporated with Ti 4+ of TiO2 matrix and both ions have a coordination number equal to 6 that enhanced this incorporation. XRD data indicated to all samples are having a nanosize, but SEM analysis proved all samples are polycrystals. The photocatalytic efficiency and the quantum yield for Chlorazol black BH dye decolorization using α-MoO3 nano-belts were investigated under UV-A light and observed it elevated with using its nanocomposite. That is due to elevating the acidity of α-MoO3 nano-belts surface after incorporating it in a rutile-TiO2 crystal lattice, which decreases the recombination and increases the generalization of hydroxyl radical. The photoreaction for using α-MoO3 nano-belts and its composite obeyed pseudo-first-order kinetics.

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Section: E Suggested Mechanismmentioning

confidence: 99%

One-Step Hydrothermal Synthesis of α- MoO3 Nano-belts with Ultrasonic Assist for incorporating TiO2 as a NanoComposite

Obaid

Ahmed

2021

Egypt. J. Chem.

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“…and then produces a peroxide radical HOO ., the last species can be reacted with hydrogen ion in an aqueous solution and produces hydrogen peroxide. Hydrogen peroxide in the presence of light will split to double hydroxyl radicals ions [61][62][63][64][65]. The most acceptance mechanism for decolorization of carmoisine was suggested in figure 8 [10].…”

Section: Mechanism Of Photocatalytic Decolorization Of Carmoisine Dyementioning

confidence: 99%

Synergistic Effect of dark and photoreactions on the removal and photo-decolorization of azo carmosine dye (E122) as food dye using Rutile- TiO2 suspension

et al. 2021

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Dark and photoreactions have been employed to handle the various hazardous organic water contaminants as Synergistic technologies. The removal (dark reaction) and the photo-decolorization ( photoreaction) of azo carmosine dye (E122) as a food dye in an aqueous solution using Rutile-TiO2 and UV-A light were investigated in this work. Various parameters such as oxidant agents and temperature were determined. In dark reaction, the adsorption capacity and percentage of carmoisine dye removal elevated with the depressing of the temperature. This dark reaction of carmoisne dye is exothermic, physical adsorption, less random, non-spontaneous, and quick response with low activation energy. The maximum value removal % is reached to 86 % when addition mixing of Fe(II) and H2O2 to dye solution. In photoreaction, the same oxidant agents were applied in the dye solution and found the reaction is a pseudo-first-order kinetic, exothermic reaction, fast (low activation energies), less random, and spontaneous. The maximum percentage of decolorization with the addition of mixing of Fe(II) and H2O2 equal to 64.28% at 30 min.

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Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

Cited by 2 publications

References 57 publications

One-Step Hydrothermal Synthesis of α- MoO3 Nano-belts with Ultrasonic Assist for incorporating TiO2 as a NanoComposite

One-Step Hydrothermal Synthesis of α- MoO3 Nano-belts with Ultrasonic Assist for incorporating TiO2 as a NanoComposite

Synergistic Effect of dark and photoreactions on the removal and photo-decolorization of azo carmosine dye (E122) as food dye using Rutile- TiO2 suspension

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