Biochar-supported photocatalysts: Performance optimization and applications in emerging contaminant removal from wastewater

Kahkeci, Julide; Gamal El-Din, Mohamed

doi:10.1016/j.cej.2023.146530

Cited by 16 publications

(2 citation statements)

References 122 publications

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“…The biochar was used as a support material to improve light intensity, absorption capacity, porosity, and pore structure. It possesses strong adsorption qualities, which are beneficial for photocatalytic material immobilization. − Furthermore, the hybrid composite of BiOI/g-C 3 N 4 /Bi 2 WO 6 /Biochar was created in this work using a solution approach assisted by ultrasonics. Utilizing the hybrid composite as a photocatalyst, the degradation of synthetic organic dye was studied in response to visible light.…”

Section: Introductionmentioning

confidence: 99%

Integrating BiOI/g-C₃N₄/Bi₂WO₆ Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Rana,

Sonu,

Sudhaik

et al. 2024

Ind. Eng. Chem. Res.

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Photocatalysis for environmental cleanup applications has seen an enormous increase in interest recently. This study aimed to examine the in situ photoactivity of the photocatalyst BiOI/g-C3N4/Bi2WO6/Biochar for the photocatalytic decomposition of the target pollutant methylene blue (MB). During photocatalysis, biochar is utilized as a support material by using light harvesting and electron-conductive qualities to hinder the quick recombination of e–/h+ pairs. The BiOI/g-C3N4/Bi2WO6/Biochar composite showed improved photoactivity and stability after adding biochar. For MB degradation, the attained rate constant K was found to be 0.04102 > 0.02446 > 0.01818 > 0.0119 > 0.00933 > 0.00705 min–1 for g-C3N4/Bi2WO6/BIOI/Biochar > g-C3N4/Bi2WO6/BIOI > g-C3N4/Bi2WO6 > BiOI > Bi2WO6 > g-C3N4, respectively. The degradation efficiencies of BiOI/g-C3N4/Bi2WO6/Biochar photocatalysts for MB were 97.56% within 70 min. Scavenger and electron spin resonance (ESR) studies further demonstrated that h+, •O2 –, and •OH are significant reactive species that aid in the photodegradation of dyes. Additionally, the structural analyses of MB using DFT calculations and the examination of the degraded products using GC-MS (gas chromatography–mass spectrometry) allowed for a more insightful deduction of the photodegradation pathways. Results showed that the degradation efficiencies of BiOI/g-C3N4/Bi2WO6 significantly improved the degradation rate with the addition of biochar. The quaternary composite improved light harvesting, absorption capacity, porosity, and pore structure of the photocatalyst. This work suggests possible applications and a novel technique for large-scale photocatalytic degradation. It also suggests a straightforward and inexpensive strategy for creating a stable semiconductor-based photocatalytic system.

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Section: Introductionmentioning

confidence: 99%

Integrating BiOI/g-C₃N₄/Bi₂WO₆ Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Rana,

Sonu,

Sudhaik

et al. 2024

Ind. Eng. Chem. Res.

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“…In recent years, metal oxide and biochar composites have received much attention for pollutant adsorption and photo-catalysis [21]. Various biochar-loaded photo-catalysts have been reported with better sensitivity to visible light, higher stability, regeneration ability, and photo-catalytic degradation efficiencies [22,23]. Guo et al [24] prepared a composite of biochar with BiVO 4 , which could improve the degradation efficiency of sulfanilamide.…”

Section: Introductionmentioning

confidence: 99%

Visible-Light-Driven Z-Type Pg-C3N4/Nitrogen Doped Biochar/BiVO4 Photo-Catalysts for the Degradation of Norfloxacin

Li,

Wang,

Chen

et al. 2024

Materials

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Antibiotics cannot be effectively removed by traditional wastewater treatment processes, and have become widespread pollutants in various environments. In this study, a Z-type heterojunction photo-catalyst Pg-C3N4 (PCN)/Nitrogen doped biochar (N-Biochar)/BiVO4 (NCBN) for the degradation of norfloxacin (NOR) was prepared by the hydrothermal method. The specific surface area of the NCBN (42.88 m2/g) was further improved compared to BiVO4 (4.528 m2/g). The photo-catalytic performance of the catalyst was investigated, and the N-Biochar acted as a charge transfer channel to promote carrier separation and form Z-type heterojunctions. Moreover, the NCBN exhibited excellent performance (92.5%) in removing NOR, which maintained 70% degradation after four cycles. The main active substance of the NCBN was •O2−, and the possible degradation pathways are provided. This work will provide a theoretical basis for the construction of heterojunction photo-catalysts.

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Synthesis of reduced graphene oxide supported FeCu and its environmental applications

Ahmad,

Qureshi,

Hassan

et al. 2024

Environ Sci Pollut Res

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Biochar-supported photocatalysts: Performance optimization and applications in emerging contaminant removal from wastewater

Cited by 16 publications

References 122 publications

Integrating BiOI/g-C₃N₄/Bi₂WO₆ Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Integrating BiOI/g-C₃N₄/Bi₂WO₆ Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Visible-Light-Driven Z-Type Pg-C3N4/Nitrogen Doped Biochar/BiVO4 Photo-Catalysts for the Degradation of Norfloxacin

Synthesis of reduced graphene oxide supported FeCu and its environmental applications

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Biochar-supported photocatalysts: Performance optimization and applications in emerging contaminant removal from wastewater

Cited by 16 publications

References 122 publications

Integrating BiOI/g-C3N4/Bi2WO6 Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Integrating BiOI/g-C3N4/Bi2WO6 Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Visible-Light-Driven Z-Type Pg-C3N4/Nitrogen Doped Biochar/BiVO4 Photo-Catalysts for the Degradation of Norfloxacin

Synthesis of reduced graphene oxide supported FeCu and its environmental applications

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Integrating BiOI/g-C₃N₄/Bi₂WO₆ Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights

Integrating BiOI/g-C₃N₄/Bi₂WO₆ Derived Dual S-Scheme Photocatalyst with Biochar for Emerging Adsorption for Photocatalysis: Multicharge Migration and Mechanistic Insights