Enhanced Photocatalytic Properties of Pure and Cr-Modified ZnS Powders Synthesized by Precipitation Method

Mahammed, Bedour A.; Ahmed, Luma M.

doi:10.4236/gep.2017.510009

Cited by 12 publications

(4 citation statements)

References 21 publications

(12 reference statements)

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“…75-1546) and (JCPDS 01-080-0006), hexagonal CdS is had somewhat weaker peak at 39.36 o in (102) plane this agreement with reference [39]. Some peaks such as 48.66, 58.5, and 52.3° of ZnS are shifted to a lower angle (2θ), this behavior is confirmed that the metal bond is formed [23], so, Cd is incorporated with Zn lattice and produced ZnS-CdS as a nanocomposite.…”

Section: Structural Propertysupporting

confidence: 73%

“…In order to abate this problem, some researchers had been published many numbers of manuscripts in this field. Mahammed and Ahmed modified the surface of ZnS by doped Cr [23] and the doped mixture from Cr and Mn [24] on his surface with using co-precipitation method to improve the optical properties and using them in decolorization of reactive black 5 dye.…”

Section: ■ Introductionmentioning

confidence: 99%

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Incorporation CdS with ZnS as Composite and Using in Photo-Decolorization of Congo Red Dye

Fakhri

Ahmed

2019

Indones. J. Chem.

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The aim of this manuscript was to modify the ZnS surface by incorporating with CdS photocatalyst. This manner led to depressing the recombination process and increasing the activity. The X-ray Powder Diffraction (XRD) data were proved that the CdS incorporated with ZnS and formed ZnS-CdS nanocomposite by observing new peaks at 26.92, 28.62, 30.52, and 47.26°. Based on the Atomic Force Microscopy (AFM) analysis and Tauc equation, the particle sizes for all samples were raised with decreased the band gap values. The activation energy for decolorization of Congo red with the using ZnS is found to be more than that value for the using prepared ZnS-CdS composite. The percentage of efficiency was found to be increased with modified the ZnS surface.

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Section: Structural Propertysupporting

confidence: 73%

Section: ■ Introductionmentioning

confidence: 99%

Incorporation CdS with ZnS as Composite and Using in Photo-Decolorization of Congo Red Dye

Fakhri

Ahmed

2019

Indones. J. Chem.

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“…This photo reactor consists of a wooden box. This wooden box contains a magnetic stirrer, a fan, a beaker for the reaction and a High pressure mercury lamp-250 Watts (Radium-Germany) as the radiation source, which has a light intensity equal to 1.458 × 10 -7 Ens s -1 by using a chemical actinometric solution [14]. In this work, an In the beginning, the dark reaction was carried out for 30 min, when UV-A light illuminated the generated suspension solution.…”

Section: Methods Of Photodecolorizationmentioning

confidence: 99%

Preparation, Characterization and Study of the Photodecolorization of Mixed-Ligand Binuclear Co(II) Complex of Schiff Base by ZnO

et al. 2020

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In this work, a new mixed-ligand binuclear Co(II) complex of Schiff base was prepared. Moreover, the characterization of this prepared complex was performed by measurement of melting points, UV-Vis spectra, FT-IR spectra, and magnetic susceptibility measurements, and later compared with metal and ligand solutions. It has been discovered that the Schiff bases with Co(II) ion forms a binuclear complex with a stoichiometry of molar ratio 1:2 from "metal:ligand". The photodecolorization of this complex was done under UV light for ZnO's suspension solution. The results of this photodecolorization showed that the greatest efficiency was obtained with the use of ZnO dose of 300 mg/100 mL and at an initial pH of 7. The decolorization activation energy for this complex is a small value of 11.289 kJ mol -1 . Additionally, the thermodynamic study for this reaction is non-spontaneous, endothermic and less random.

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“…This mechanism relies on three essential requirements suitable photocatalyst, source of light such as UV or Visible or solar, and colored solution like dye solution. when a source of light is filled on the suspension solution of TiO2 with carmoisine dye, the h + -epairs will create on photocatalyst [54,55]. Series of redox sequence process will start and generate hydroxyl radicals HO .…”

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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Enhanced Photocatalytic Properties of Pure and Cr-Modified ZnS Powders Synthesized by Precipitation Method

Cited by 12 publications

References 21 publications

Incorporation CdS with ZnS as Composite and Using in Photo-Decolorization of Congo Red Dye

Incorporation CdS with ZnS as Composite and Using in Photo-Decolorization of Congo Red Dye

Preparation, Characterization and Study of the Photodecolorization of Mixed-Ligand Binuclear Co(II) Complex of Schiff Base by ZnO

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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