A dual S-scheme g-C3N4/Fe3O4/Bi2WO6/Bi2S3 heterojunction for improved photocatalytic decomposition of methylene blue: Proposed mechanism, and stability studies

Okab, Ayah A.; Alwared, Abeer I.

doi:10.1016/j.mssp.2022.107196

Cited by 37 publications

(8 citation statements)

References 95 publications

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“…The results show the elements present in the structure of the g-C3N4/Fe3O4 nanocomposite are uniformly dispersed on its surface. Similar findings reported in Okab and coworkers study 32 . Finally, in (Fig.…”

Section: Fig 4: Xrd Pattern Of Pure G-c3n4 and G-c3n4/fe3o4 Nanocompo...supporting

confidence: 92%

Optimizing the Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Herbicide from Aqueous Solution

Mehralipour,

Motie,

Kermani

2023

Preprint

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This study focuses on the synthesis of a g-C3N4/Fe3O4 nanocomposite and optimization of PCP in degrading 2,4-D in water. The g-C3N4 and the g-C3N4/Fe3O4 were synthesized using a two-step direct calcination approach and co-precipitation respectively. The quality assessment of the synthesized nanocomposite was conducted through the utilization of XRD, DRS, FTIR, FE-SEM, EDS, elemental mapping, TEM and VSM analytical techniques. The quadratic model has a high F-value (152.27) and low P-value (0.0001), indicating its suitability for explaining the amplification relationship between response values. The optimum parameters for PCP to decompose 2,4-D were determined to be pH~6.5, catalyst dose~16.5 mg/L, reaction time~55.5 min, and initial 2,4-D concentration~52 mg/L (96.11% degradation efficacy). The data showed strong correlation with first-order kinetics (R2>0.95). The efficiency of the PCP is boosted by the existence of a catalyst and photolysis, which creates multiple pathways for 2,4-D breakdown. The PCP exhibited a capacity to diminish COD and TOC by 75% and 63%, respectively. The reaction time decreases with higher light intensity and 2,4-D removal is complete in 45 minutes at 60 mW/cm2. Methanol greatly affects the PCP's scavenging ability. In contrast, the impact of sodium azide was observed to be the least significant and the OH● is deemed as the principal ROS in the PCP. The results show that PO43- reduces efficiency to 72%. The PCP's ability to remove 2,4-D, COD, and TOC remained consistent even after the sixth cycle. The EE/O, 17.3 KW/h.m3.order was calculated. The intermediate products were 2,4-dichlorophenol, 2,6-dichlorophenol, 4,6-dichlororesorcinol, 2-chlorohydroquinone, and 2-chloro-1,4-benzoquinone.

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Section: Fig 4: Xrd Pattern Of Pure G-c3n4 and G-c3n4/fe3o4 Nanocompo...supporting

confidence: 92%

Optimizing the Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Herbicide from Aqueous Solution

Mehralipour,

Motie,

Kermani

2023

Preprint

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“…The phase structures of BiOBr, ZnFe2O4, CuO, and BiOBr/ZnFe2O4/CuO. were characterized by XRD [103], see Figure 9.…”

Section: Hydrothermal Methodsmentioning

confidence: 99%

“…Another study showed that by using Iron oxide/CdS to degrade Xylenol blue (XB), the photodegradation efficiency was 90.2% after 3 hr [127]. Also, it was reported that the BiOBr/ZnFe2O4/CuO photocatalyst has optimum photocatalytic properties, which has the ability for destroying 98% of malachite green in 90 min [103].…”

Section: Photo-catalytic Activity Of Biobrmentioning

confidence: 99%

A Review of BiOBr-Based Photocatalysts for Wastewater Treatment

Mahdi,

Ebrahim

2024

IJHT

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Semiconductor based photo-catalysts which was an efficient process to treat water and wastewater. There are various techniques can be used for enhancement of photo-catalytic properties such as element rich strategy, defect control and facet engineering. Many methods were used for manufacturing of BiOBr, including ion-exchange method, solvothermal method, wet-chemical method, ultra-sonication method, co-precipitation method and hydrothermal method. Various operational parameters have such as initial pH of solution, catalyst dosage and inorganic ions have been employed to show their roles on the photo-degradation efficiency of pollutants. Elemental doping and coupled semiconductors are the widely using methods for enhancing BiOBr performance. It was concluded that the binary and ternary composites have the ability to enhancement the photo-catalytic activity and increased the degradation efficiency more than 50% compared with pure BiOBr. According to suitable band structure, bismuth bromide oxide is a promising candidate to treat wastewater efficiently by photo-catalytic technique.

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“…G-C 3 N 4 , due to its exceptional electronic characteristics and chemical durability, stands out as a prominent polymer semiconductor material with great potential for application in the field of microwave absorption materials. , On the one hand, the introduction of other elements or compounds can effectively enhance the absorption properties of g-C 3 N 4 by modifying its structure . For example, by blending metal particles or magnetic nanoparticles with g-C 3 N 4 , researchers can create composites that exhibit superior microwave absorption properties. − These composites exhibit high absorption across a broad frequency range while maintaining low density and thickness, making them particularly effective in reducing the weight and size of the absorption components. Zhu and his colleagues created a composite of MOF-Co@CNTs by pyrolyzing a precursor of ZIF-67/g-C 3 N 4 .…”

Section: Introductionmentioning

confidence: 99%

Advanced CuS/g-C₃N₄/Fe₃O₄ Nanostructures for Broadband Microwave Absorption

Ding,

Cheng,

Dong

et al. 2024

ACS Appl. Nano Mater.

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In recent years, the demand for micronano materials with superior microwave absorption capabilities has been on the rise, such as strong absorption capacity, lightweight, and wide frequency bandwidth, to tackle the issues associated with electromagnetic microwave (EMW) pollution. Here, the CuS/g-C 3 N 4 /Fe 3 O 4 nanocomposite was fabricated using a simple mechanical stirring, hydrothermal treatment, and high-temperature calcination, composed of graphitic carbon nitride (g-C 3 N 4 ), micron-sized flower-like copper sulfide (CuS), and iron oxide nanoparticles (Fe 3 O 4 ). The CuS/g-C 3 N 4 /Fe 3 O 4 nanocomposite has an excellent EMW absorption performance. The results show that the maximum reflection loss (RL max ) of the CuS/g-C 3 N 4 / Fe 3 O 4 nanocomposite could achieve −41.2 dB at a frequency of 13.7 GHz with a thickness of 2.5 mm, corresponding to an ultrawide effective absorption bandwidth (RL < −10 dB) of 8.6 GHz (9.4−18 GHz). The excellent EMW properties of the CuS/g-C 3 N 4 /Fe 3 O 4 nanocomposite are attributed to various mechanisms such as multidimensional multilevel scattering, interfacial polarization, and magnetic decay processes. The unique three-dimensional (3D) structure of the CuS/g-C 3 N 4 /Fe 3 O 4 nanocomposite holds promise in providing ideas and solutions for the advancement of EMW technology in the future.

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A dual S-scheme g-C3N4/Fe3O4/Bi2WO6/Bi2S3 heterojunction for improved photocatalytic decomposition of methylene blue: Proposed mechanism, and stability studies

Cited by 37 publications

References 95 publications

Optimizing the Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Herbicide from Aqueous Solution

Optimizing the Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Herbicide from Aqueous Solution

A Review of BiOBr-Based Photocatalysts for Wastewater Treatment

Advanced CuS/g-C₃N₄/Fe₃O₄ Nanostructures for Broadband Microwave Absorption

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A dual S-scheme g-C3N4/Fe3O4/Bi2WO6/Bi2S3 heterojunction for improved photocatalytic decomposition of methylene blue: Proposed mechanism, and stability studies

Cited by 37 publications

References 95 publications

Optimizing the Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Herbicide from Aqueous Solution

Optimizing the Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Herbicide from Aqueous Solution

A Review of BiOBr-Based Photocatalysts for Wastewater Treatment

Advanced CuS/g-C3N4/Fe3O4 Nanostructures for Broadband Microwave Absorption

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Product

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Advanced CuS/g-C₃N₄/Fe₃O₄ Nanostructures for Broadband Microwave Absorption