Synergistic utilization of magnetic rGO/NiFe2O4-g-C3N4 S-Scheme heterostructure photocatalyst with enhanced charge carrier separation and transfer: A highly stable and robust photocatalyst for efficient solar fuel (hydrogen) generation

Hafeez, Hafeez Yusuf; Mohammad, Jibrin; Ndikilar, Chifu E.; Suleiman, Abdussalam Balarabe; Sa’id, Rabia Salihu; Muhammad, Ibrahim

doi:10.1016/j.ceramint.2022.10.045

Cited by 28 publications

(6 citation statements)

References 59 publications

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“…The findings indicate that the RNC-3 hybrid heterostructure demonstrates notable efficacy and stability as a photocatalyst for water-splitting. It exhibits a hydrogen generation activity of 11 817 µmol g −1 h −1 , which is approximately 4 and 76 times greater than that of NiFe 2 O 4 -g-C 3 N 4 and g-C 3 N 4 nanosheets, correspondingly [112]. In another study according to Li et al a CdIn 2 S 4 /Au/rGO nanocomposite catalyst with increased CO 2 adsorption capacities and multi-interface electron transport pathways performed well in photoreduction [113].…”

Section: Heterojunctionsmentioning

confidence: 89%

Recent progress in modifications of g-C₃N₄ for photocatalytic hydrogen evolution and CO₂ reduction

Rana,

Dhiman,

Kumar

et al. 2023

Semicond. Sci. Technol.

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Photocatalytic H2 evolution and CO2 reduction are promising technologies for addressing environmental and energy issues. g-C3N4 is one of most promising materials to form improved catalysts because of its exceptional electrical structure, physical and chemical characteristics, and distinctive metal-free feature. This article provides a summary of current advancements in g-C3N4-based catalysts from innovative design approaches and their applications. Hydrogen evolution has reached 6305.18 µmol g−1 h−1 and >9 h of stability using the SnS2/g-C3N4 heterojunction. Additionally, the ZnO/Au/g-C3N4 maintains a constant CO generation rate of 689.7 mol m−2 during the 8 h reaction. To fully understand the interior relationship of theory–structure performance on g-C3N4-based materials, modifications are studied simultaneously. Furthermore, the synthesis of g-C3N4 and g-C3N4-based materials, as well as their respective instances, have been reported. The reduction of CO2 and H2 generation is summarized. Lastly, a short overview of the present issues and potential alternatives for g-C3N4-based materials is provided.

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Section: Heterojunctionsmentioning

confidence: 89%

Recent progress in modifications of g-C₃N₄ for photocatalytic hydrogen evolution and CO₂ reduction

Rana,

Dhiman,

Kumar

et al. 2023

Semicond. Sci. Technol.

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“…87- [15][16][17][18][19][20][21][22][23][24][25][26]. In other studies this peak reported in this location 26,27 . In g-C3N4-Fe3O4 nanocomposite, in addition to the peak related to g-C3N4, new peaks have appeared at 2θ of 30.1°, 35.5°, 43.1°, 53.4°, 57.0°and 62.6°corresponded to the (220), ( 311), ( 400), ( 422), ( 511) and (440) planes, which could be indexed to Fe3O4 (JCPDS: 85-1436).…”

Section: Fig 3: Ft-ir Spectra Of Pure G-c3n4 and G-c3n4/fe3o4 Nanocom...mentioning

confidence: 96%

“…In the optimal condition of the PCP, it was demonstrated that the rate of degradation of 2,4-D follows a first-order reaction (Eq. 6) (27). ln(Ct/C0) =k ppa t (6) Where, Ct is residual and C0 is the initial 2,4-D concentrations (mg/L), t is the time of reaction (min) and kapp is the rate constant (1/min).…”

Section: -7 Supplementary Studiesmentioning

confidence: 99%

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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“…A channel for charge transfer consisting of bent energy bands was formed inside g-C3N5 and TiO2, and the eon the CB of TiO2 recombines with the h + on the VB of g-C3N5 through the charge transfer channel. Meanwhile, a large amount of redox-active eand h + remain on the CB and VB of g-C3N5 and TiO2, realizing the efficient separation of photogenerated carriers [38] . The ECB of g-C3N5 was more negative than the standard NHE potential of O2/•O2 -(-0.33 eV), and a large number of active ewith high reducing activity on the CB of g-C3N5 realizes the conversion of O2 and •O2 -in the system.…”

Section: Analysis Of Photocatalytic Mechanism and Degradation Mechanismmentioning

confidence: 99%

Construction of TiO2/g-C3N5 S-scheme heterojunction for enhanced photocatalytic degradation of organic pollutants: DFT calculation and mechanism study

Liu,

Zhang,

Hong

et al. 2024

Preprint

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The g-C3N5 has been widely used in the field of environmental remediation because of its narrow band gap energy and good visible light absorption. It is an excellent semiconductor photocatalytic material, but the recombination of photogenerated carriers greatly limits the photocatalytic performance of g-C3N5. Construction of heterojunctions is an efficient method to regulate the band gap structure, which can achieve efficient separation of photogenerated carriers and improve photocatalytic performance. In this study, the TiO2/g-C3N5 heterojunction materials with high specific surface area were constructed, and the S scheme charge transfer mechanism led to efficient photogenerated carrier separation, excellent redox activity, improved visible light absorption and broadened spectral response range. After visible light irradiation for 30 minutes, the TiO2/g-C3N5 (1:2) showed excellent photocatalytic activity, and the degradation rate of sulfamethylthiazole (STZ) reached 98.8%. STZ was degraded to small inorganic molecules such as H2O, CO2 and inorganic acids by a complex bond-breaking hydroxylation reaction under the attack of reactive groups such as ·O2−,·OH and h+. The S scheme charge transfer mechanism of TiO2/g-C3N5 heterojunction material was proposed through band potential analysis and density functional function (DFT) calculation.

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Synergistic utilization of magnetic rGO/NiFe2O4-g-C3N4 S-Scheme heterostructure photocatalyst with enhanced charge carrier separation and transfer: A highly stable and robust photocatalyst for efficient solar fuel (hydrogen) generation

Cited by 28 publications

References 59 publications

Recent progress in modifications of g-C₃N₄ for photocatalytic hydrogen evolution and CO₂ reduction

Recent progress in modifications of g-C₃N₄ for photocatalytic hydrogen evolution and CO₂ reduction

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

Construction of TiO2/g-C3N5 S-scheme heterojunction for enhanced photocatalytic degradation of organic pollutants: DFT calculation and mechanism study

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Synergistic utilization of magnetic rGO/NiFe2O4-g-C3N4 S-Scheme heterostructure photocatalyst with enhanced charge carrier separation and transfer: A highly stable and robust photocatalyst for efficient solar fuel (hydrogen) generation

Cited by 28 publications

References 59 publications

Recent progress in modifications of g-C3N4 for photocatalytic hydrogen evolution and CO2 reduction

Recent progress in modifications of g-C3N4 for photocatalytic hydrogen evolution and CO2 reduction

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

Construction of TiO2/g-C3N5 S-scheme heterojunction for enhanced photocatalytic degradation of organic pollutants: DFT calculation and mechanism study

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Recent progress in modifications of g-C₃N₄ for photocatalytic hydrogen evolution and CO₂ reduction

Recent progress in modifications of g-C₃N₄ for photocatalytic hydrogen evolution and CO₂ reduction