α-Fe2O3/Ag/g-C3N4 Core-Discontinuous Shell Nanocomposite as an Indirect Z-Scheme Photocatalyst for Degradation of Ethylbenzene in the Air Under White LEDs Irradiation

Parvari, Rouhollah; Shahna, Farshid Ghorbani; Bahrami, Abdulrahman; Azizian, Saeid; Assari, Mohammad Javad; Farhadian, Maryam

doi:10.1007/s10562-020-03236-6

Cited by 15 publications

(6 citation statements)

References 54 publications

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“…can be enhanced by combining photocatalysis and plasma [28][29][30][31][32][33][34]. This finding confirms the in situ regeneration of the photocatalytic support in the presence of plasma [35][36][37][38][39][40][41].…”

Section: Reusability and In Situ Regenerationsupporting

confidence: 77%

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Khezami,

Assadi

2023

Materials

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This study investigates the pilot-scale combination of nonthermal plasma and photocatalysis for removing Toluene and dimethyl sulfur (DMDS), examining the influence of plasma energy and initial pollutant concentration on the performance and by-product formation in both pure compounds and mixtures. The results indicate a consistent 15% synergy effect, improving Toluene conversion rates compared to single systems. Ozone reduction and enhanced CO2 selectivity were observed when combining plasma and photocatalysis. This process effectively treats pollutant mixtures, even those containing sulfur compounds. Furthermore, tests confirm nonthermal plasma’s in-situ regeneration of the photocatalytic surface, providing a constant synergy effect.

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Section: Reusability and In Situ Regenerationsupporting

confidence: 77%

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Khezami,

Assadi

2023

Materials

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“…This superoxide anion undergoes an additional reaction with water, leading to the generation of the highly reactive oxidizing agent, hydroxyl radical [122], which is consistent with the scavenger's findings. These transfers occurred much faster than the recombination of photogenerated electrons and holes in α-Fe 2 O 3 [125]. The holes on VB of α-Fe 2 O 3 reacted with OH − to produce • OH, since the VB of α-Fe 2 O 3 is more positive than the electrode potential of • OH/H 2 O (1.99 eV vs. NHE) [126].…”

Section: Effect Of Radical Scavengersmentioning

confidence: 99%

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Alshammari,

Kosa,

Patel

et al. 2024

Water

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Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost and eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), with its respective metal oxides of α-Fe2O3 and CeO2 nanoparticles, was synthesized using a combination of hexadecyltrimethylammonium bromide (CATB) and ascorbic acid via the hydrothermal method. To tune the band gap, the heterojunction nanocomposite of α-Fe2O3-CeO2 was decorated with plasmonic Au nanoparticles (Au NPs). The various characterization methods, such as FTIR, UV-vis DRS, XRD, XPS, TEM, EDX, SEM, and PL, were used to determine the properties of the materials, including their morphology, elemental composition, optical properties, band gap energy, and crystalline phase. The nanocomposite of α-Fe2O3-CeO2@Au was utilized to remove Rose Bengal (RB) dye from wastewater using a photocatalytic technique when exposed to visible light. A comprehensive investigation of the impact of the catalyst concentration and initial dye concentration was conducted to establish the optimal photodegradation conditions. The maximum photocatalytic efficiency of α-Fe2O3-CeO2@Au (50 mg L−1) for RB (20 ppm) dye removal was found to be 88.9% in 120 min under visible-light irradiation at a neutral pH of 7 and 30 °C. Various scavengers, such as benzoquinone (BQ; 0.5 mM), tert-butyl alcohol (TBA; 0.5 mM), and ethylenediaminetetraacetic acid (EDTA; 0.5 mM), were used to investigate the effects of different free radicals on the photocatalytic process. Furthermore, the reusability of the α-Fe2O3-CeO2@Au photocatalyst has also been explored. Furthermore, the investigation of the potential mechanism demonstrated that the heterojunction formed between α-Fe2O3 and CeO2, in combination with the presence of deposited Au NPs, led to an enhanced photocatalytic efficiency by effectively separating the photogenerated electron (e−)–hole (h+) pairs.

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“…have been attempted. The salient feature of the composites responsible towards superior photocatalytic performances is the formation of heterojunction interface (Type II and Z scheme) between Fe 2 O 3 and g-C 3 N 4 [106,134].…”

Section: Fementioning

confidence: 99%

“…On the other hand, the holes migrate from VB of Fe 2 O 3 into the VB of g-C 3 N 4 for oxidation reaction as the CB and VB edge potentials of g-C 3 N 4 are more negative than case of Z-scheme heterojunction [137,138], as shown in figure 10, the photo-generated electrons from the CB of Fe 2 O 3 migrates into the VB of g-C 3 N 4 and recombines with holes. This process leaves behind photo-generated charges in the VB of Fe 2 O 3 and CB of g-C 3 N 4 for redox reactions [106,134,139]. Hence a direct Z-scheme structure, instead of Type II heterojunction, is recommended to form the g-C 3 N 4 /Fe 2 O 3 hybrid.…”

Section: Fementioning

confidence: 99%

“…In another study, α-Fe 2 O 3 /g-C 3 N 4 composite (∼0.5 wt%) is prepared by a facile hydrothermal method which displays higher photocatalytic activity for the reduction of Cr(VI) than pure g-C 3 N 4 and α-Fe 2 O 3 [130]. The α-Fe 2 O 3 NPs are dispersed on the surface of g-C 3 N 4 , and no aggregation is observed by Xiao et al Table 1 summarizes [143][144][145][146][147][148][149][150][151][152][153][154][155][156][157][158][159] several preparation methods of α-Fe 2 O 3 /g-C 3 N 4 composites and their uses as photocatalysts.…”

Section: Fementioning

confidence: 99%

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Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Das

Chowdhury

2021

Nanotechnology

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Heterogeneous photocatalysis premised on advanced oxidation processes has witnessed a broad application perspective, including water purification and environmental remediation. In particular, the graphitic carbon nitride (g-C3N4), an earth-abundant metal-free conjugated polymer, has acquired extensive application scope and interdisciplinary consideration owing to its outstanding structural and physicochemical properties. However, several issues such as the high recombination rate of the photo-generated electron–hole pairs, smaller specific surface area, and lower electrical conductivity curtail the catalytic efficacy of bulk g-C3N4. Another challenging task is separating the catalyst from the reaction medium, limiting their reusability and practical applications. Therefore, several methodologies are adopted strategically to tackle these issues. Attention is being paid, especially to the magnetic nanocomposites (NCs) based catalysts to enhance efficiency and proficient reusability property. This review summarizes the latest progress related to the design and development of magnetic g-C3N4-based NCs and their utilization in photocatalytic systems. The usefulness of the semiconductor heterojunctions on the catalytic activity, working mechanism, and degradation of pollutants are discussed in detail. The major challenges and prospects of using magnetic g-C3N4-based NCs for photocatalytic applications are highlighted in this report.

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α-Fe2O3/Ag/g-C3N4 Core-Discontinuous Shell Nanocomposite as an Indirect Z-Scheme Photocatalyst for Degradation of Ethylbenzene in the Air Under White LEDs Irradiation

Cited by 15 publications

References 54 publications

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

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α-Fe2O3/Ag/g-C3N4 Core-Discontinuous Shell Nanocomposite as an Indirect Z-Scheme Photocatalyst for Degradation of Ethylbenzene in the Air Under White LEDs Irradiation

Cited by 15 publications

References 54 publications

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Recent advancements of g-C3N4-based magnetic photocatalysts towards the degradation of organic pollutants: a review

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Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review