Photocatalytic removal of the antidepressant fluoxetine from aqueous media using TiO2 P25 and g-C3N4 catalysts

Fotiou, Despoina; Lykos, Christos; Konstantinou, Ioannis

doi:10.1016/j.jece.2023.111677

Cited by 4 publications

(3 citation statements)

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“…PL studies are important for determining the rate at which the photogenerated charges recombine in a semiconductor [ 57 ]. From the PL spectra presented in Figure 8 , it can be clearly observed that CNTU exhibited a lower PL intensity compared to CNU, which is consistent with the findings of similar works and probably results from the existence of a larger number of structural defects (such as uncondensed amino groups) in the structure of CNTU, which act as electron captors, facilitating charge separation [ 42 , 98 ].…”

Section: Resultsmentioning

confidence: 99%

“…In order to further elucidate the effectiveness of 6.5%-WCNU in the degradation of CLO, the TPs formed during the photocatalytic process were detected and tentatively identified via UHPLC-LTQ-Orbitrap MS. A total of five TPs were identified, and their corresponding high-resolution mass spectroscopy data are summarized in Table 3 . It should be noted that the identification of all the aforementioned TPs was based on their chromatographic (retention) behavior, accurate mass, pseudo-molecular ion, and MS 2 fragmentation ions, as well as the results of similar studies where possible [ 57 ]. Furthermore, the confidence level (CL) of each identification was defined according to the work of Schymanski et al [ 118 ].…”

Section: Resultsmentioning

confidence: 99%

“…The ability of all synthesized materials to produce HO • photocatalytically was evaluated by observing the transformation of TA (probe) to 2TA-OH for 60 min according to the fluorimetric methodology reported in our previous publication [ 57 ].…”

Section: Methodsmentioning

confidence: 99%

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Synthesis and Characterization of Composite WO3 Fibers/g-C3N4 Photocatalysts for the Removal of the Insecticide Clothianidin in Aquatic Media

Lykos,

Bairamis,

Efthymiou

et al. 2024

Nanomaterials

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Photocatalysis is a prominent alternative wastewater treatment technique that has the potential to completely degrade pesticides as well as other persistent organic pollutants, leading to detoxification of wastewater and thus paving the way for its efficient reuse. In addition to the more conventional photocatalysts (e.g., TiO2, ZnO, etc.) that utilize only UV light for activation, the interest of the scientific community has recently focused on the development and application of visible light-activated photocatalysts like g-C3N4. However, some disadvantages of g-C3N4, such as the high recombination rate of photogenerated charges, limit its utility. In this light, the present study focuses on the synthesis of WO3 fibers/g-C3N4 Z-scheme heterojunctions to improve the efficiency of g-C3N4 towards the photocatalytic removal of the widely used insecticide clothianidin. The effect of two different g-C3N4 precursors (urea and thiourea) and of WO3 fiber content on the properties of the synthesized composite materials was also investigated. All aforementioned materials were characterized by a number of techniques (XRD, SEM-EDS, ATR-FTIR, Raman spectroscopy, DRS, etc.). According to the results, mixing 6.5% W/W WO3 fibers with either urea or thiourea derived g-C3N4 significantly increased the photocatalytic activity of the resulting composites compared to the precursor materials. In order to further elucidate the effect of the most efficient composite photocatalyst in the degradation of clothianidin, the generated transformation products were tentatively identified through UHPLC tandem high-resolution mass spectroscopy. Finally, the detoxification effect of the most efficient process was also assessed by combining the results of an in-vitro methodology and the predictions of two in-silico tools.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%