Mechanism of clomazone photocatalytic degradation: hydroxyl radical, electron and hole scavengers

Abramović, Biljana F.; Despotović, Vesna; Šojić, Daniela V.; Finčur, Nina

doi:10.1007/s11144-014-0814-z

Cited by 71 publications

(34 citation statements)

References 26 publications

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“…The photocatalytic mechanism of the GQDs/Sb 2 WO 6 composites was illuminated by investigating the main active species generated in the photocatalytic process, such as the holes (h + ), the superoxide anion radicals (O 2 · − ) and the hydroxyl radicals (·OH) . EDTA‐2Na, BQ and IPA were chosen as the trapping agents, respectively, to capture h + , O 2 · − , and ·OH .…”

Section: Resultsmentioning

confidence: 99%

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb₂WO₆ Under Ultraviolet‐ and Visible‐Light Irradiation

Chen

et al. 2020

Bulletin Korean Chem Soc

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A novel composite of graphene quantum dots functionalized Sb 2 WO 6 (GQDs/Sb 2 WO 6 ) was prepared by an electrostatic self-assembly method and used as a photocatalyst for the degradation of an organic pollutant. The resulting GQDs/Sb 2 WO 6 was characterized by electron microscopy and optical measurements. The photocatalytic activity of GQDs/Sb 2 WO 6 was investigated by degrading methyl orange (MO) under UV-light and visible-light irradiation. Compared with pure Sb 2 WO 6 , enhancement of the photocatalytic performance of GQDs/Sb 2 WO 6 was achieved, and the degradation efficiency for MO was almost 100% within 3 h under UV-light irradiation and 71.4% within 3 h under visible-light irradiation. The photocatalytic degradation mechanism of GQDs/Sb 2 WO 6 was illustrated by free radical and hole scavenging experiments, and the main active species were confirmed to be holes (h + ) and superoxide anion radicals (O 2 Á − ). Moreover, the GQDs/Sb 2 WO 6 composites exhibited high recyclability and stability and had potential application for decomposing other organic contaminants in water.

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Section: Resultsmentioning

confidence: 99%

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb₂WO₆ Under Ultraviolet‐ and Visible‐Light Irradiation

Chen

et al. 2020

Bulletin Korean Chem Soc

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“…The concentration of all scavenger was chosen as 60 mM except p-benzoquinone which was selected as 6 mM. The scavengers used in this study are DMSO for * OH bulk, [27] sodium iodide for * OH ads, [28] potassium iodide for h + , [28] p-benzoquinone for superoxide radicals, [29] silver nitrate for e À , [30] and sodium azide for O � . [31] Figure 8a shows the influence of the scavengers on RB5 degradation by g-C 3 N 4 .…”

Section: Scavengersmentioning

confidence: 99%

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C₃N₄ Nanocomposites

2020

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An azo dye, Reactive Black 5 (RB5), was degraded by three photocatalysts of g‐C3N4, Ag(2 %)/g‐C3N4, and Ag(5 %)/g‐C3N4 with the specific surface areas of 34.41, 28.70, and 35.58 m2 g−1 and the band gaps of 2.52, 1.56, and 1.71 eV under sunlight illumination, respectively. The results showed 40 mg/L of g‐C3N4 could degrade completely 10 ppm RB5 at pH 3.4 within 10 min under sunlight irradiation with the first‐order rate constant of 0.312 min−1. Under the same conditions, the complete degradation time of RB5 reduced to 5 and 7 min when the plasmonic nanocomposites of Ag (2 %)/g‐C3N4 and Ag (5 %)/g‐C3N4 were used as photocatalysts, respectively. Ag content had an important influence on the photocatalytic activity of g‐C3N4 against RB5 so that Ag (2 %)/g‐C3N4 possessed the best photocatalytic efficiency with the rate constant of 0.795 min−1. In fact, Ag nanoparticles through the surface plasmon resonance effects and by accepting the photogenerated electrons could improve the visible‐light absorption and increase charge separation of g‐C3N4. The results showed superoxide radical is the main oxidant in the photodegradation of RB5.

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“…Apart from O 2 , which is the most frequently applied electron acceptor, according to the available literature data, (NH 4 ) 2 S 2 O 8 is also often used as electron acceptor since in its presence the efficiency of photocatalytic removal of different pollutants increases (20,26) [3]…”

Section: Photocatalytic Degradation Of Thiotriazinonementioning

confidence: 99%

Photocatalytic degradation of thiotriazinone, stable hydrolysis product of antibiotic ceftriaxone

2019

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In this work, the efficiency of direct photolytic and photocatalytic degradation of thiotriazinone, stable hydrolysis product of antibiotic ceftriaxone, was examined. The efficiency of photocatalytic degradation of 0.05 mmol/dm 3 thiotriazinone solution was investigated using commercially available TiO 2 Hombikat catalyst under simulated solar irradiation, as well as in the absence/presence of ammonium persulfate ((NH 4) 2 S 2 O 8) as electron acceptor. It was found that the optimal conditions for photocatalytic degradation of thiotriazinone were: catalyst loading 1.0 mg/cm 3 of TiO 2 Hombikat, electron acceptor 3 mmol/dm 3 of (NH 4) 2 S 2 O 8 solution, and pH 7.6. Under the stated conditions 76.0% of thiotriazinone was degradated after 60 min of irradiation. The kinetics of degradation was followed by UFLC-DAD technique.

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Mechanism of clomazone photocatalytic degradation: hydroxyl radical, electron and hole scavengers

Cited by 71 publications

References 26 publications

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb₂WO₆ Under Ultraviolet‐ and Visible‐Light Irradiation

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb₂WO₆ Under Ultraviolet‐ and Visible‐Light Irradiation

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C₃N₄ Nanocomposites

Photocatalytic degradation of thiotriazinone, stable hydrolysis product of antibiotic ceftriaxone

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Mechanism of clomazone photocatalytic degradation: hydroxyl radical, electron and hole scavengers

Cited by 71 publications

References 26 publications

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb2WO6 Under Ultraviolet‐ and Visible‐Light Irradiation

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb2WO6 Under Ultraviolet‐ and Visible‐Light Irradiation

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C3N4 Nanocomposites

Photocatalytic degradation of thiotriazinone, stable hydrolysis product of antibiotic ceftriaxone

Contact Info

Product

Resources

About

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb₂WO₆ Under Ultraviolet‐ and Visible‐Light Irradiation

Graphene Quantum Dots Enhanced Photocatalytic Activity of Sb₂WO₆ Under Ultraviolet‐ and Visible‐Light Irradiation

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C₃N₄ Nanocomposites