Enhanced photocatalytic ozonation of organics by g-C3N4 under visible light irradiation

Liao, Gaozu; Zhu, Dongyun; Li, Laisheng; Lan, Bingyan

doi:10.1016/j.jhazmat.2014.08.052

Cited by 83 publications

(28 citation statements)

References 29 publications

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“…The results indicate that the combination of photoelectrocatalysis and ozonation is much more efficient compared to the O 3 + PC as the former leads to a relatively much faster decolorization and mineralization. Some works have proven that the combination of O 3 + PC results in a synergistic effect and have shown such a combination to be an efficient way of degrading organic pollutants [14,15,[22][23][24]. Nevertheless, by a simple application of a voltage using a power supply it is possible to reach mineralization of about 90% in 60 min of treatment, while in O 3 + PC the TOC removal is 60% at the same time (a gain of about 1.4 times).…”

Section: Effect Of Ozonation Photoelectrocatalysis Photocatalysis Amentioning

confidence: 99%

Combination of photoelectrocatalysis and ozonation: A novel and powerful approach applied in Acid Yellow 1 mineralization

Bessegato

Cardoso

Silva

et al. 2016

Applied Catalysis B: Environmental

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Photoelectrocatalytic oxidation (PEC) is known to be a powerful technique employed with the aim of promoting organic degradation. Its efficiency is nonetheless found to be dramatically decreased when applied in highly concentrated effluent treatment owing to the reduced transparency which minimizes the photons reaching the semiconductor surface. In light of that, the present work seeks to describe a novel combination of photoelectrocatalysis and ozonation (O 3 + PEC) techniques, aiming at achieving a faster decolorization of a highly concentrated solution and a higher rate of mineralization. The Acid Yellow 1 dye (AY1), widely used in cosmetics was chosen as a colorful solution model. TiO 2 nanotubes electrode was used as photoanode in an annular bubble reactor operating at 2.0 V with UV-B irradiation in the presence of 1.25 × 10 −4 mol min −1 of O 3. The main factors interfering in the O 3 + PEC process were optimized through UV/vis spectrophotometry, total organic carbon (TOC) and mass spectrometry measurements. After 20 min of treatment using the combined system, 100% of decolorization was observed while a total mineralization was seen following 60 min of treatment even in effluents containing 100 ppm AY1. Concomitantly, the combined system (O 3 + PEC) showed higher decolorization rate constant and lower energy consumption compared to the other techniques, showing that O 3 + PEC is a successful, efficient and cost-effective alternative for water treatment.

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Section: Effect Of Ozonation Photoelectrocatalysis Photocatalysis Amentioning

confidence: 99%

Combination of photoelectrocatalysis and ozonation: A novel and powerful approach applied in Acid Yellow 1 mineralization

Bessegato

Cardoso

Silva

et al. 2016

Applied Catalysis B: Environmental

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“…An additional cut-off filter (λ > 410 nm) was used for visible light irradiation. Also, Liao et al [ 49 ] used a 500 W Xe lamp jacketed by a quartz thimble filled with flowing and thermostated aqueous NaNO 2 solution (1 M) between the lamp and the reaction chamber as a filter to block UV light (λ < 400 nm). High or medium-pressure Hg lamps have also been used.…”

Section: The Solar Photocatalytic Ozonation Processmentioning

confidence: 99%

Solar or UVA-Visible Photocatalytic Ozonation of Water Contaminants

Beltrán

Rey

2017

Molecules

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An incipient advanced oxidation process, solar photocatalytic ozonation (SPO), is reviewed in this paper with the aim of clarifying the importance of this process as a more sustainable water technology to remove priority or emerging contaminants from water. The synergism between ozonation and photocatalytic oxidation is well known to increase the oxidation rate of water contaminants, but this has mainly been studied in photocatalytic ozonation systems with lamps of different radiation wavelength, especially of ultraviolet nature (UVC, UVB, UVA). Nowadays, process sustainability is critical in environmental technologies including water treatment and reuse; the application of SPO systems falls into this category, and contributes to saving energy and water. In this review, we summarized works published on photocatalytic ozonation where the radiation source is the Sun or simulated solar light, specifically, lamps emitting radiation to cover the UVA and visible light spectra. The main aspects of the review include photoreactors used and radiation sources applied, synthesis and characterization of catalysts applied, influence of main process variables (ozone, catalyst, and pollutant concentrations, light intensity), type of water, biodegradability and ecotoxicity, mechanism and kinetics, and finally catalyst activity and stability.

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“…10,11 However, g-C 3 N 4 has the defects of high recombination rate of photogenerated electron-hole pairs and low quantum efficiency, which greatly decrease its utilization of visible light. [12][13][14] Also, the inconvenient recycling and secondary pollution of powder photocatalysts in water treatment applications is an ongoing problem that needs to be solved.…”

Section: Introductionmentioning

confidence: 99%

Facile assembly of novel g-C₃N₄@expanded graphite and surface loading of nano zero-valent iron for enhanced synergistic degradation of tetracycline

2019

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Enhanced photocatalytic ozonation of organics by g-C3N4 under visible light irradiation

Cited by 83 publications

References 29 publications

Combination of photoelectrocatalysis and ozonation: A novel and powerful approach applied in Acid Yellow 1 mineralization

Combination of photoelectrocatalysis and ozonation: A novel and powerful approach applied in Acid Yellow 1 mineralization

Solar or UVA-Visible Photocatalytic Ozonation of Water Contaminants

Facile assembly of novel g-C₃N₄@expanded graphite and surface loading of nano zero-valent iron for enhanced synergistic degradation of tetracycline

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Enhanced photocatalytic ozonation of organics by g-C3N4 under visible light irradiation

Cited by 83 publications

References 29 publications

Combination of photoelectrocatalysis and ozonation: A novel and powerful approach applied in Acid Yellow 1 mineralization

Combination of photoelectrocatalysis and ozonation: A novel and powerful approach applied in Acid Yellow 1 mineralization

Solar or UVA-Visible Photocatalytic Ozonation of Water Contaminants

Facile assembly of novel g-C3N4@expanded graphite and surface loading of nano zero-valent iron for enhanced synergistic degradation of tetracycline

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Product

Resources

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Facile assembly of novel g-C₃N₄@expanded graphite and surface loading of nano zero-valent iron for enhanced synergistic degradation of tetracycline