Degradation of Diazinon based on photoelectrocatalytic technique using enhanced WO3 nanostructures: Mechanism and pathway

Roselló-Márquez, G.; Fernández‐Domene, R.M.; Sánchez-Tovar, Rita; Cifre-Herrando, M.; Garcı́a-Antón, J.

doi:10.1016/j.jece.2021.105371

Cited by 25 publications

(10 citation statements)

References 54 publications

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“…From Figure S2 , it can be observed that both nanostructures presented a similar topography, manifesting a porous organization with clusters of grains of the order of nanometers. Furthermore, it can be seen that the sample synthesized with citric acid has a higher value of roughness than that one synthesized with H 2 O 2 , which could be beneficial for the adsorption of organic compounds [ 16 ]. Therefore, with AFM results, it can be affirmed that the roughness of the sample synthesized with citric acid is higher than that one synthesized with H 2 O 2 .…”

Section: Resultsmentioning

confidence: 99%

“…In this work, the procedure followed to obtain the WO 3 nanostructures was carried out by W electrochemical anodization under hydrodynamic conditions. The method was optimized by the authors in previous works [ 16 , 27 , 28 ].…”

Section: Methodsmentioning

confidence: 99%

“…An appropriate semiconductor for use as a photoanode in the PEC technique must have a proper bandgap, efficient

separation and transport, and good photoelectrocatalytic properties and stability [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…Tungsten trioxide (WO 3 ) is raising attention for being used as a photoanode for PEC due to its favorable features: (i) suitable value of bandgap that enables absorption of part of the visible rays of the solar spectrum (≈2.6 eV, which corresponds to a wavelength of ≈480 nm), (ii) stability in acidic electrolytes (iii) excellent electrical conductivity and (iv) non-photoelectric corrosion [ 17 , 18 , 19 ]. Furthermore, previous studies from this group have proved that WO 3 nanostructures are effective for removing different pesticides from water by PEC [ 16 , 18 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

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Degradation of Methylparaben Using Optimal WO3 Nanostructures: Influence of the Annealing Conditions and Complexing Agent

et al. 2022

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In this work, WO3 nanostructures were synthesized with different complexing agents (0.05 M H2O2 and 0.1 M citric acid) and annealing conditions (400 °C, 500 °C and 600 °C) to obtain optimal WO3 nanostructures to use them as a photoanode in the photoelectrochemical (PEC) degradation of an endocrine disruptor chemical. These nanostructures were studied morphologically by a field emission scanning electron microscope. X-ray photoelectron spectroscopy was performed to provide information of the electronic states of the nanostructures. The crystallinity of the samples was observed by a confocal Raman laser microscope and X-ray diffraction. Furthermore, photoelectrochemical measurements (photostability, photoelectrochemical impedance spectroscopy, Mott–Schottky and water-splitting test) were also performed using a solar simulator with AM 1.5 conditions at 100 mW·cm−2. Once the optimal nanostructure was obtained (citric acid 0.01 M at an annealing temperature of 600 °C), the PEC degradation of methylparaben (CO 10 ppm) was carried out. It was followed by ultra-high-performance liquid chromatography and mass spectrometry, which allowed to obtain the concentration of the contaminant during degradation and the identification of degradation intermediates. The optimized nanostructure was proved to be an efficient photocatalyst since the degradation of methylparaben was performed in less than 4 h and the kinetic coefficient of degradation was 0.02 min−1.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…An appropriate semiconductor for use as a photoanode in the PEC technique must have a proper bandgap, efficient

separation and transport, and good photoelectrocatalytic properties and stability [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Degradation of Methylparaben Using Optimal WO3 Nanostructures: Influence of the Annealing Conditions and Complexing Agent

et al. 2022

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“…18,19 DCF derived from phenylacetic acid is supposed to be a harmless drug for humans 20 but was found to be toxic to fish, daphnia and green algae. 21 So far, some attempts to eliminate these organic pollutants involved photo-degradation, 22,23 electrochemical degradation, 24,25 biodegradation [26][27][28] and ozonation. 29,30 Total mineralization turned out to be fairly difficult to achieve, resulting in the unavoidable formation of persistent derivatives with more or less ecotoxicity.…”

Section: Introductionmentioning

confidence: 99%