Synthesis of citrate–modified CuFeS2 catalyst with significant effect on the photo–Fenton degradation efficiency of bisphenol a under visible light and near–neutral pH

Salla, Julia da Silveira; Martinello, Kátia da Boit; Dotto, Guilherme L.; García-Díaz, Esmeralda; Javed, Hassan; Alvarez, Pedro J. J.; Foletto, Edson Luiz

doi:10.1016/j.colsurfa.2020.124679

Cited by 28 publications

(10 citation statements)

References 34 publications

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“…Recently, Cu/Fe-bearing solids such as chalcopyrite (CuFeS 2 ) have been widely used as catalysts in advanced oxidation processes (AOPs) for wastewater treatment [37][38][39][40][41]. For instance, Dotto et al demonstrated the ability of their prepared citrate-CuFeS 2 materials to degrade 90% of bisphenol A (BPA) in a 15-min Fenton process [42]. Their novel CuFeS 2 samples were prepared with a microwave reactor (1400 W, 200 • C, 7 min).…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Wen

Lai

et al. 2022

Catalysts

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In this study, Chalcopyrite (CuFeS2) was prepared by a hydrothermal and co-precipitation method, being represented as H-CuFeS2 and C-CuFeS2, respectively. The prepared CuFeS2 samples were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy mapping (EDS-mapping), powder X-ray diffractometer (XRD), X-ray photoelectron spectrometry (XPS), and Raman microscope. Rhodamine B (RhB, 20 ppm) was used as the target pollutant to evaluate the degradation performance by the prepared CuFeS2 samples. The H-CuFeS2 samples (20 mg) in the presence of Na2S2O8 (4 mM) exhibited excellent degradation efficiency (98.8% within 10 min). Through free radical trapping experiment, the major active species were •SO4− radicals and •OH radicals involved the RhB degradation. Furthermore, •SO4− radicals produced from the prepared samples were evaluated by iodometric titration. In addition, one possible degradation mechanism was proposed. Finally, the prepared H-CuFeS2 samples were used to degrade different dyestuff (rhodamine 6G, methylene blue, and methyl orange) and organic pollutant (bisphenol A) in the different environmental water samples (pond water and seawater) with 10.1% mineral efficiency improvement comparing to traditional Fenton reaction.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Wen

Lai

et al. 2022

Catalysts

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“…32 Also, the extra three characteristic peaks, located at 709.99 and 731.07 eV, corresponded to Fe 2+ . 37 Besides, the peak located at 720.18 eV was attributed to the satellite peak. This indicated that Fe 2+ was generated in the FeMoS 2 -IS due to the reduction of Fe 3+ by thiourea.…”

Section: Resultsmentioning

confidence: 99%

FeMoS₂ micoroparticles as an excellent catalyst for the activation of peroxymonosulfate toward organic contaminant degradation

et al. 2023

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“…With the promise of the sunlight-assisted Fenton reaction, the pH effect in the water samples on the degradation performance of CuFeS 2 /Ag 3 PO 4 was also investigated. As shown in Figure 17C, the degradation efficiency decreased at pH 12.0 because the Fenton reaction was considerably hindered at a high pH as Fe 2+ cations form inactive porphyrin ferryl complexes (FeO 2+ ) in the alkaline solution [24]. Finally, the prepared CuFeS 2 /Ag 3 PO 4 composites were used to degrade RhB in the environmental water samples (Figure 17D).…”

Section: Stability and Practical Applications Of Cufes 2 /Ag 3 Pomentioning

confidence: 99%

“…In general, AOPs are based on Fenton's chemistry, which utilizes hydroxyl radicals produced from the Fenton reaction between H 2 O 2 and Cu + /Fe 2+ ions to degrade organic dyes (Equations ( 1)-( 6)) [22,23]. However, the reusability of CuFeS 2 is a challenge due to its dissolution during water treatment and the slow kinetics of Fe 2+ regeneration: To address CuFeS 2 reusability, attempts have been made to regenerate the Fenton catalysts with UV and/or visible-light irradiation, known as the photo-Fenton process [19,24,25]. Under UV and/or visible-light irradiation, Fe 3+ complexes are formed from the Fenton reaction (Equation (7)) to produce both Fe 2+ and hydroxyl radicals (Equation (8)).…”

Section: Introductionmentioning

confidence: 99%

“…The photogenerated Fe 2+ ions can catalyze the Fenton reaction to form Fe 3+ , thus demonstrating the recyclability of Fenton catalysts (Equation (4)). For instance, Dotto et al demonstrated that the prepared citrate-CuFeS 2 materials possessed 90% catalytic efficiency for bisphenol A (BPA) degradation with a 15 min photo-Fenton process for its rapid generation of hydroxyl radicals and efficient H 2 O 2 consumption [24]. Dotto et al also reported that the catalytic efficiency and stability was sustained after four consecutive photoregeneration cycles.…”

Section: Introductionmentioning

confidence: 99%

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Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process

Chang

Wen

et al. 2020

Nanomaterials

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A new composite by coupling chalcopyrite (CuFeS2) with silver phosphate (Ag3PO4) (CuFeS2/Ag3PO4) was proposed by using a cyclic microwave heating method. The prepared composites were characterized by scanning and transmission electron microscopy and X-ray diffraction, Fourier-transform infrared, UV–Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Under optimum conditions and 2.5 W irradiation (wavelength length > 420 nm, power density = 0.38 Wcm−2), 96% of rhodamine B (RhB) was degraded by CuFeS2/Ag3PO4 within a 1 min photo-Fenton reaction, better than the performance of Ag3PO4 (25% degradation within 10 min), CuFeS2 (87.7% degradation within 1 min), and mechanically mixed CuFeS2/Ag3PO4 catalyst. RhB degradation mainly depended on the amount of hydroxyl radicals generated from the Fenton reaction. The degradation mechanism of CuFeS2/Ag3PO4 from the photo-Fenton reaction was deduced using a free radical trapping experiment, the chemical reaction of coumarin, and photocurrent and luminescence response. The incorporation of CuFeS2 in Ag3PO4 enhanced the charge separation of Ag3PO4 and reduced Ag3PO4 photocorrosion as the photogenerated electrons on Ag3PO4 were transferred to regenerate Cu2+/Fe3+ ions produced from the Fenton reaction to Cu+/Fe2+ ions, thus simultaneously maintaining the CuFeS2 intact. This demonstrates the synergistic effect on material stability. However, hydroxyl radicals were produced by both the photogenerated holes of Ag3PO4 and the Fenton reaction of CuFeS2 as another synergistic effect in catalysis. Notably, the degradation performance and the reusability of CuFeS2/Ag3PO4 were promoted. The practical applications of this new material were demonstrated from the effective performance of CuFeS2/Ag3PO4 composites in degrading various dyestuffs (90–98.9% degradation within 10 min) and dyes in environmental water samples (tap water, river water, pond water, seawater, treated wastewater) through enhanced the Fenton reaction under sunlight irradiation.

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Synthesis of citrate–modified CuFeS2 catalyst with significant effect on the photo–Fenton degradation efficiency of bisphenol a under visible light and near–neutral pH

Cited by 28 publications

References 34 publications

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

FeMoS₂ micoroparticles as an excellent catalyst for the activation of peroxymonosulfate toward organic contaminant degradation

Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process

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Synthesis of citrate–modified CuFeS2 catalyst with significant effect on the photo–Fenton degradation efficiency of bisphenol a under visible light and near–neutral pH

Cited by 28 publications

References 34 publications

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

FeMoS2 micoroparticles as an excellent catalyst for the activation of peroxymonosulfate toward organic contaminant degradation

Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process

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FeMoS₂ micoroparticles as an excellent catalyst for the activation of peroxymonosulfate toward organic contaminant degradation