Photocatalytic degradation of Congo red dye using magnetic silica-coated Ag2WO4/Ag2S as Type I heterojunction photocatalyst: Stability and mechanisms studies

Jabbar, Zaid H.; Graimed, Bassim H.; Issa, Mohammed; Ammar, Saad H.; Ebrahim, Shahlaa Esmail; Khadim, Hussein J.; Okab, Ayah A.

doi:10.1016/j.mssp.2022.107151

Cited by 65 publications

(12 citation statements)

References 100 publications

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“…The photoexcited electrons and holes will be shifting and accumulating in the CB and VB of PS II leading to insufficient separation of photoexcited carriers and overall deterioration of the redox capability. Despite that, it has been investigated in the literature, Jabbar et al engineered magnetic silica-coated Ag 2 WO 4 /Ag 2 S type I heterojunction for efficient visible light degradation of Congo red dye [39]. They reported that the formation of type I heterojunction improved photocatalytic activity 3.26 and 2.94 times that of pure Ag 2 WO 4 and Ag 2 S NPs, respectively.…”

Section: Construction Of Heterojunctional Photocatalysts 2d/2d and 1d/2dmentioning

confidence: 99%

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

Botella,

Cao,

Celis

et al. 2024

J. Phys.: Condens. Matter

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The emerging 2D semiconductors substantially extend materials bases for versatile applications such as semiconductor photocatalysis demanding semiconductive matrices and large surface areas. The dimensionality, while endowing 2D semiconductors the unique properties to host photocatalytic functionality of pollutant removal and hydrogen evolution, hurdles the activation paths to form heterogenous photocatalysts where the photochemical processes are normally superior over these on the mono-compositional counterparts. In this perspective, we present a cross-dimensional strategy to employ the nD (n=0-2) clusters or nanomaterials as activation partners to boost the photocatalytic activities of the 2D semiconductors. The formation principles of heterogenous photocatalysts are illustrated specifically for the 2D matrices, followed by selection criteria of them among the vast 2D database. The computer investigations are illustrated in the density functional theory route and machine learning benefitted from the vast samples in the 2D library. Synthetic realizations and characterizations of the 2D heterogenous systems are introduced with an emphasis on chemical methods and advanced techniques to understand materials and mechanistic studies. The perspective outlooks cross-dimensional activation strategies of the 2D materials for other applications such as CO2 removal, and materials matrices in other dimensions which may inspire incoming research within these fields.

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Section: Construction Of Heterojunctional Photocatalysts 2d/2d and 1d/2dmentioning

confidence: 99%

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

Botella,

Cao,

Celis

et al. 2024

J. Phys.: Condens. Matter

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“…The prepared nanocomposite membranes were cut into 1 cm 2 square pieces and used in adsorption studies. During the studies, the impact of several parameters such as temperature (293-323 K), initial dye concentration (5-900 mg/L), contact time (1-600 min), pH (3)(4)(5)(6)(7)(8)(9)(10), and adsorbent dosage (0.1-10 g/L) was investigated. The effect of each parameter was studied while the rest of the parameters were maintained constant.…”

Section: Adsorption Testsmentioning

confidence: 99%

“…[4] Skin irritation, cancer, mutation, and tissue necrosis are some of the mentioned threats. [5] To prevent the introduction of such pollutants into the environment, several methods such as biodegradation, [6] photodegradation, [7,8] electrochemical, [9] adsorption, [10] membrane technology, [11,12] chelation flocculation and precipitation flotation, [13] and chemical oxidation [14,15] processes have been employed.…”

Section: Introductionmentioning

confidence: 99%

Chitosan/polyvinyl alcohol/hydroxyapatite nanocomposite membrane for the efficient adsorption of Congo red anionic dye

et al. 2023

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This work focused on fabricating a novel chitosan/polyvinyl alcohol/ hydroxyapatite (CPH) nanocomposite membrane and its application in removing the Congo red (CR) from aqueous solutions. After proper characterization of the chitosan/polyvinyl alcohol/hydroxyapatite adsorptive membrane, adsorption tests were carried out on the optimum nanocomposite membrane containing 1 wt% hydroxyapatite. The impact of temperature, contact time, initial dye concentration, adsorbent dosage, and pH was investigated. Results of isotherm and kinetic investigation revealed that Langmuir isotherm and pseudo‐second order kinetics best fitted experimental results with R2 values of 0.995. A relatively high adsorption capacity of 491 mg/g, higher than that of activated carbon, was achieved.

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“…Congo red dye can have detrimental effects on human health, including skin irritation, redness, and potential allergic reactions. There is some research suggesting possible carcinogenic properties associated with congo red dye. , Photocatalytic decomposition of congo red dye has been studied using expensive photocatalysts such as polypyrrole/silver/graphene nanocomposite, magnetic silica-coated Ag 2 WO 4 /Ag 2 S, chitosan/SnO 2 nanocomposite, TiO 2 -doped cobalt ferrite nanoparticles, chitosan/Fe 3 O 4 nanocomposite, CeO 2 /CdTe nanocomposite, CeO 2 /CdSe, and SnS 2 /CdO nanocomposite. − In this specific study, we demonstrate the straightforward production of MgAl 2 O 4 spinel nanoparticles through the application of the Pechini sol–gel method. The synthesized MgAl 2 O 4 nanoparticles were characterized by using Fourier transform infrared (FT-IR), field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), UV–vis, and high-resolution transmission electron microscopy (HR-TEM) analyses.…”

Section: Introductionmentioning

confidence: 99%

Efficient Photocatalytic Degradation of Congo Red Dye Using Facilely Synthesized and Characterized MgAl₂O₄ Nanoparticles

Al-Farraj,

Abdelrahman

2024

ACS Omega

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The discharge of congo red dye into water sources by factories has been associated with a range of health concerns, such as cancer, redness, skin irritation, and allergic reactions. As a result, this research focused on the cost-effective and straightforward production of MgAl 2 O 4 nanoparticles by using the Pechini sol−gel process. Subsequently, these nanoparticles were employed for the successful photocatalytic decomposition of congo red dye. Moreover, extensive characterization of the fabricated MgAl 2 O 4 nanoparticles was conducted through diverse methodologies, which included Fouriertransform infrared spectroscopy, ultraviolet−visible spectrophotometry, highresolution transmission electron microscopy (HR-TEM), field-emission scanning electron microscopy (FE-SEM), and powder X-ray diffraction (XRD). Furthermore, the XRD analysis disclosed that the average crystal size of the produced MgAl 2 O 4 nanoparticles is 10.36 nm, and their optical energy gap was determined to be 3.71 eV. The FE-SEM examination unveiled a combination of spherical and disorganized structures with a 0.14 μm average grain size. HR-TEM analysis, in turn, revealed that the fabricated MgAl 2 O 4 nanoparticles were composed of minuscule spherical particles with an average diameter of 8.75 nm. The maximum degradation of 50 mL of congo red dye at a concentration of 25 mg/L reached 99.27% within 80 min at a pH of 3. Additionally, the findings confirmed the consistent decomposition activity toward congo red dye even after four cycles, thereby validating the effectiveness and reusability of the MgAl 2 O 4 nanoparticles that were developed in this study.

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Photocatalytic degradation of Congo red dye using magnetic silica-coated Ag2WO4/Ag2S as Type I heterojunction photocatalyst: Stability and mechanisms studies

Cited by 65 publications

References 100 publications

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

Chitosan/polyvinyl alcohol/hydroxyapatite nanocomposite membrane for the efficient adsorption of Congo red anionic dye

Efficient Photocatalytic Degradation of Congo Red Dye Using Facilely Synthesized and Characterized MgAl₂O₄ Nanoparticles

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Photocatalytic degradation of Congo red dye using magnetic silica-coated Ag2WO4/Ag2S as Type I heterojunction photocatalyst: Stability and mechanisms studies

Cited by 65 publications

References 100 publications

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

Chitosan/polyvinyl alcohol/hydroxyapatite nanocomposite membrane for the efficient adsorption of Congo red anionic dye

Efficient Photocatalytic Degradation of Congo Red Dye Using Facilely Synthesized and Characterized MgAl2O4 Nanoparticles

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Efficient Photocatalytic Degradation of Congo Red Dye Using Facilely Synthesized and Characterized MgAl₂O₄ Nanoparticles