Versatile Ag2O and ZnO nanomaterials fabricated via annealed Ag-PMOS and ZnO-PMOS: An efficient photocatalysis tool for azo dyes

Shahzad, Khurram; Hussain, Shahid; Nazir, Mamona; Jamshaid, Muhammad; Rehman, Aziz ur; Alkorbi, Ali S.; Alsaiari, Raiedhah; Alhemiary, Nabil A.

doi:10.1016/j.molliq.2022.119036

Cited by 51 publications

(20 citation statements)

References 58 publications

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“…Therefore, extensive research is being done on treatment methods that can effectively remove and/or degrade azo dyes from industrial effluents. These treatment methods include, coagulation, adsorption, chemical oxidation, photocatalysis, and biodegradation 6–11 . Most of these methods are not economical and have low efficiency and selectivity which impedes their upscaling.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic degradation of methyl orange using beta cyclodextrin modified polyvinylidene fluoride mixed matrix membranes imbedded with in‐situ generated palladium nanoparticles

Ndlovu

Malatjie

Donga

et al. 2022

J of Applied Polymer Sci

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Azo dyes effluent can cause severe and chronic effects to living organisms since they are toxic, carcinogenic, and mutagenic. They color water, reduce dissolved oxygen, block light penetration, decrease the rate of photosynthesis and adversely affect the whole aquatic biota. Catalysis is one of the methods used in degrading azo dyes to less harmful species. Catalytic palladium nanoparticles (Pd NPs) are effective in the degradation of azo dyes owing to their large surface area and unique electronic properties. However, they are costly, unstable and easily aggregate; hence, a substrate is necessary to enhance their stability, reusability, durability, catalytic efficiency, and cost effectiveness.Herein, Pd NPs were in-situ synthesized and immobilized in beta cyclodextrin (β-CD) modified polyvinylidene-fluoride (PVDF) membranes. The fabricated membranes were characterized using different techniques. Pd NPs slightly improved the properties and performance of the membranes. A complete catalytic degradation of methyl orange azo dye was carried out within 20 min in the presence of sodium borohydride and the increase in Pd NP content increased the rate of degradation. The membranes were recycled and reused five times with no considerable loss of catalytic performance. Therefore, PVDF/β-CD-Pd membranes proved to be self-cleaning, reusable, and efficient in removal of methyl orange from water.

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Section: Introductionmentioning

confidence: 99%

“…oxidation, photocatalysis, and biodegradation. [6][7][8][9][10][11] Most of these methods are not economical and have low efficiency and selectivity which impedes their upscaling.…”

mentioning

confidence: 99%

Catalytic degradation of methyl orange using beta cyclodextrin modified polyvinylidene fluoride mixed matrix membranes imbedded with in‐situ generated palladium nanoparticles

Ndlovu

Malatjie

Donga

et al. 2022

J of Applied Polymer Sci

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“…Advanced oxidation processes based on UV, photo catalysis, Fenton, and Fenton-like oxidation were suggested for the removal of pollutants from an aqueous media [1][2][3][4][5][6]. Among these methods, Fenton reactions attracted much attention and showed high removal e ciency of di erent dyes from wastewater [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of the Removal of Methyl Orange Dye by Coupling WO3/H2O2

Eroi

Ello

Diabaté

et al. 2022

Journal of Chemistry

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In the present work, the heterogeneous Fenton-like process was employed to investigate the kinetic models of the degradation of methyl orange (MO) using tungsten oxide/hydrogen peroxide couple. Tungsten oxide particles were successfully synthesized by reflux without surfactant and characterized by using XRD, SEM, TEM, and FT-IR techniques. The influence of parameters such as temperature and concentration of MO was studied and pseudo first-order and second-order models were applied. WO3/H2O2 showed high efficiency in the removal of methyl orange and attained more than 92.8% in 180 min. The first-order kinetic model was described by the removal process with the correlation coefficient of R2 = 0.99.

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“…Synthetic dyes are among the most dangerous environmental contaminants. Even little dye concentrations in water block light breakthrough through the surface of the water, preventing aquatic ora from photosynthesis [6,7]. Many of these colors are toxic, carcinogenic, mutagenic, and teratogenic to sh, microorganisms and humans.…”

Section: Introductionmentioning

confidence: 99%

“…Because azo dyes and their derivatives are lightfast, not sensitive to deterioration under natural conditions and highly stable during washing, so they account for the vast majority of synthetic dyes used today [7,9]. One of the azo dyes is acid orange 7 (AO7) dye which can harm the environment and pose a health risk to humans.…”

Section: Introductionmentioning

confidence: 99%

Magnetic pomegranate peels activated carbon (MG-PPAC) composite for Acid Orange 7 dye removal from wastewater

Khalil

Nazir

Salem

et al. 2022

Preprint

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A magnetic pomegranate peels activated carbon (MG-PPAC) composite was prepared as an effective adsorbent for Acid Orange 7 (AO7) dye removal from wastewater. The effects of impregnation ratio and activation temperatures (600–900°C) on the specific surface area, and pore morphology were studied. The synthesized composite MG-PPAC was considered by BET, SEM, EDX, FT-IR, XRD and VSM. The prepared magnetic composite at 700°C activation temperature and impregnation ratio 1/2 (peels/ZnCl2) exhibited 513.34 m2 g− 1 surface area, 0.4025 cm3 g–1 volume of the total pores, and 3.1364 nm mean diameter of the pores. The magnetization saturation (Ms), remanence (Mr) and coercivity (Hc) of the MG-PPA composite were 14.116 emu/g, 0.50685 emu/g, and 19.705 G, respectively. Also, the composite MG-PPAC was in a super-paramagnetic state at room temperature and could be gathered within 5 S (less than 5 S) with an external magnetic field. Impact of pH, adsorbent dose, initial concentration of adsorbate (AO7 dye), and time of contact have been studied to optimize the removal process. The Langmuir (LIM), Freundlich (FIM) and Tempkin (TIM) isotherm models were used to investigate MG-PPAC adsorption behavior for AO7 dye. Applicability of Langmuir isotherm model (LIM) demonstrates a monolayer adsorption AO7 dye removal process, and the maximum monolayer capacity (Qm) attained from linear solvation of LIM is 322.58 mg g–1. Also, the adsorption process was tested using PFOM, PSOM, IPDM, FDM, and E. The pseudo-second order model is well-fitted to the operational data of AO7 dye removal (R2 = 0.983–1.0) related to the other kinetic models.

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Versatile Ag2O and ZnO nanomaterials fabricated via annealed Ag-PMOS and ZnO-PMOS: An efficient photocatalysis tool for azo dyes

Cited by 51 publications

References 58 publications

Catalytic degradation of methyl orange using beta cyclodextrin modified polyvinylidene fluoride mixed matrix membranes imbedded with in‐situ generated palladium nanoparticles

Catalytic degradation of methyl orange using beta cyclodextrin modified polyvinylidene fluoride mixed matrix membranes imbedded with in‐situ generated palladium nanoparticles

Kinetic Study of the Removal of Methyl Orange Dye by Coupling WO3/H2O2

Magnetic pomegranate peels activated carbon (MG-PPAC) composite for Acid Orange 7 dye removal from wastewater

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