Visible light assisted photocatalytic degradation of crystal violet, bromophenol blue and eosin Y dyes using AgBr-ZnO nanocomposite

Abdelkhalek, Ahmed; Mahmoud, Sawsan A.; Zaki, A.H.

doi:10.1016/j.enmm.2018.03.002

Cited by 54 publications

(24 citation statements)

References 52 publications

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“…The effect of sulfates on the photocatalytic activity of TiO 2 /diatomite indicated that the addition of a small amount of sulfate ions promoted the initial phase and, consequently, the stable sulfate had a strong electron affinity, capturing the photogenerated electrons and making the e − /h + pair recombination difficult. Other anions and/or inorganic species have also been observed in the degradation of different pollutants [67,68].…”

Section: Effect Of the Presence Of So 4 2− Ionsmentioning

confidence: 99%

Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Miranda

Viana²,

Honorio³

et al. 2020

Minerals

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Titanium and zirconium oxides (TiO2 and ZrO2, respectively) were obtained from alkoxides hydrolyses, and then deposited into palygorskite clay mineral (Pal) to obtain new materials for photocatalytic applications. The obtained materials were characterized by structural, morphological, and textural techniques. X-ray diffraction (XRD) results confirmed the characteristic peaks of oxides and clay transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images of the modified palygorskite with both oxides showed that the clay was successfully modified by the proposed method. The increase in the specific surface area of the clay occurred when TiO2 and ZrO2 were deposited on the surface. The photocatalytic activity of these materials was investigated using the Remazol Blue anion dye under UV light. The evaluated systems presented high photocatalytic activity, reaching approximately 98% of dye discoloration under light. Thus, TiO2–Pal and ZrO2–TiO2–Pal are promising clay mineral-based photocatalysts.

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Section: Effect Of the Presence Of So 4 2− Ionsmentioning

confidence: 99%

Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Miranda

Viana²,

Honorio³

et al. 2020

Minerals

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“…5,7 –9 Photocatalytic degradation of various families of organic pollutants had been studied using semiconductors such as titanium dioxide (TiO 2 ), ZnO, Fe 2 O 3 , CdS, GaP, and ZnS. 10 –19 TiO 2 is the most widely used material in treating contaminated water because it is nontoxic, strong oxidant for organic pollutants, superhydrophilic, chemically stable, inexpensive, and insoluble. 5,20 –23…”

Section: Introductionmentioning

confidence: 99%

Morphological effect of titanate nanostructures on the photocatalytic degradation of crystal violet

Rashad

Zaki

Farghali

2019

Nanomaterials and Nanotechnology

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The heterogeneous photocatalysis using semiconductor nanocrystals is an important process in the field of water treatment since it is a low cost, environmentally friendly, and zero waste technique. In this work, titanate nanostructures (sheets, tubes, and wires) were prepared by simple hydrothermal method. All samples were characterized by X-ray diffraction, transmission electron microscopy, Brunauer-Emmett-Teller surface area analysis, and Zetasizer. The results revealed that tuning the morphology of TiO 2 changed the activity of the prepared nanostructures, where titanate nanowires exhibited the highest photocatalytic activity toward crystal violet dye, reaching 100% at pH 3 under ultraviolet illumination for 35 min.

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“…Comparison of the removal efficacy of our photocatalyst with those found in the literature was done [59][60][61][62][63][64] ; the results are shown in Table 6. Actually, our catalyst shows in most cases promising results.…”

Section: Optical Propertiesmentioning

confidence: 99%

Controlled synthesis of ZnO nanoparticles from a Zn(II) coordination polymer: Structural characterization, optical properties and photocatalytic activity

Said

Aly

El‐Said

et al. 2020

Applied Organom Chemis

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A zinc coordination polymer derived from pyridine‐2,6‐dicarboxylate (PDC), {[Zn2(PDC)2]}n, was successfully prepared via conventional, sonication and microwave‐irradiation methods. The composition and characteristics of the obtained coordination polymers (CPs) were investigated by elemental analysis, TGA/DTA, X‐ray diffraction and spectroscopic techniques. The so obtained CPs were heat‐treated in the air at 600 °C for 2 h to produce ZnO of nanosized particles (NPs). It is of interest to note that the synthesis approach of the precursor greatly affects both the nanoparticle size and the structure of the resulting ZnO NPs. Moreover, the smallest particle size was associated with the sample derived from the ultrasonically prepared precursor. TEM analysis revealed that all samples have sphere‐like morphologies. Structural analysis of the prepared ZnO samples was conducted and compared using Rietveld analysis of their PXRD patterns. Optical band gap calculations based on analysis of the UV–vis spectra of ZnO samples using Tauc's power law were achieved. The highest band gap of 3.63 eV was observed for ZnO sample obtained from the ultrasonically prepared precursor. Furthermore, the photocatalytic activity of ZnO NPs for the removal of Eosin Y color was monitored. The highest removal efficiency was recorded for ZnO originated from the ultrasonically synthesized precursor. Enhancement of removal efficiency that reached 98% was attained in only a period of 8 min. Its recycling test showed that it can be reused without structural changes over four cycling experiments.

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Visible light assisted photocatalytic degradation of crystal violet, bromophenol blue and eosin Y dyes using AgBr-ZnO nanocomposite

Cited by 54 publications

References 52 publications

Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Morphological effect of titanate nanostructures on the photocatalytic degradation of crystal violet

Controlled synthesis of ZnO nanoparticles from a Zn(II) coordination polymer: Structural characterization, optical properties and photocatalytic activity

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