Blue LED light-driven photoelectrocatalytic removal of naproxen from water: Kinetics and primary by-products

Changanaqui, Katherina; Alarcón, Hugo; Brillas, Enric; Sirés, Ignasi

doi:10.1016/j.jelechem.2020.114192

Cited by 20 publications

(5 citation statements)

References 26 publications

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“…Previous studies have demonstrated that the two main NPX degradation routes are decarboxylation and hydroxylation (demethylation) as one can see in Figure 5 (Kanakaraju et al, 2016;Changanaqui et al, 2020;Jung et al, 2020). Noteworthy, these two routes can occur simultaneously or successively (Méndez-Arriaga et al, 2008b;Fan et al, 2019;Kowalkińska et al, 2023).…”

Section: Resultsmentioning

confidence: 93%

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Photocatalytic degradation of naproxen using TiO2 single nanotubes

Sepúlveda,

Musiał,

Saldan

et al. 2024

Front. Environ. Chem.

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Herein, TiO2 single-tube (TiO2 ST-NT) powders with and without magnetite Fe3O4 nanoparticles (TiO2 ST-NT@Fe3O4NPs) are presented for the first time as excellent photocatalysts for the degradation of one of the most popular non-steroidal anti-inflammatory drugs (NSAIDs), naproxen (NPX). The TiO2 ST-NT powders were synthesized by anodization followed by etching of the double wall, bending, sonication, ultra-centrifugation, and finally annealing at 600°C. A part of the obtained TiO2 ST-NT powders was decorated with Fe3O4 nanoparticles using a simple one-step decoration process. The best photocatalytic performance of TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders was obtained under the white light (6.2 × 10−4 s-1) and the blue light (2.7 × 10−4 s-1), respectively. During NPX photodegradation using TiO2 ST-NT powders, three main NPX transformation products (P1, P2, and P3) were detected. Upon excitation with the blue light illumination, TiO2 ST-NT@ Fe3O4NPs powders exhibited higher performance (∼80%) than TiO2 ST-NT powders (∼23%) within 1 h, resulting in an approximately three times increased photocatalytic rate constant. Moreover, under simulated sunlight conditions, TiO2 ST-NT powders demonstrated remarkable activity, achieving a 94% NPX degradation within 1 h. TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders represent excellent photocatalysts for NPX degradation.

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Section: Resultsmentioning

confidence: 93%

“…These species further react with either oxygen or water, leading to the generation of reactive oxygen species (ROS). ROS attacks organic molecules-here, NPX (Kanakaraju et al, 2016a;Changanaqui et al, 2020;Jung et al, 2020).…”

Section: Data Availability Statementmentioning

confidence: 99%

Photocatalytic degradation of naproxen using TiO2 single nanotubes

Sepúlveda,

Musiał,

Saldan

et al. 2024

Front. Environ. Chem.

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“…Changanaqui et al [128] removed naproxen from aqueous solutions by photoelectrocatalysis (PEC), adopting a ZnO/TiO 2 /Ag 2 Se thin-film composite and under visible light. The complete degradation of the pollutant was obtained after 210 min, testing 100 mL of a 5 mg/L naproxen solution with 50 mM Na 2 SO 4 .…”

Section: Catalysismentioning

confidence: 99%

Water Purification of Classical and Emerging Organic Pollutants: An Extensive Review

2021

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The main techniques used for organic pollutant removal from water are adsorption, reductive and oxidative processes, phytoremediation, bioremediation, separation by membranes and liquid–liquid extraction. In this review, strengths and weaknesses of the different purification techniques are discussed, with particular attention to the newest results published in the scientific literature. This study highlighted that adsorption is the most frequently used method for water purification, since it can balance high organic pollutants removal efficiency, it has the possibility to treat a large quantity of water in semi-continuous way and has acceptable costs.

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“…The production of chlorine from the ubiquitous sources of seawater and solar (or synthetic LED) radiation via photoelectrocatalysis could be beneficial in specific applications. There is also evidence in the literature on the applications of chlorine intermediates in the related photoelectrochemical pollutant degradation in chloride containing media [26][27][28]. The two biggest limitations preventing photoelectrocatalysis becoming a common industrial technique (e.g.…”

Section: Supplementary Informationmentioning

confidence: 99%

Photo-Chlorine Production with Hydrothermally Grown and Vacuum-Annealed Nanocrystalline Rutile

et al. 2020

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Photo-generated high-energy surface states can help to produce chlorine in aqueous environments. Here, aligned rutile (TiO2) nanocrystal arrays are grown onto fluorine-doped tin oxide (FTO) substrates and activated either by hydrothermal Sr/Ba surface doping and/or by vacuum-annealing. With vacuum-annealing, highly photoactive films are obtained with photocurrents of typically 8 mA cm−2 at 1.0 V vs. SCE in 1 M KCl (LED illumination with λ = 385 nm and approx. 100 mW cm−2). Photoelectrochemical chlorine production is demonstrated at proof-of-concept scale in 4 M NaCl and suggested to be linked mainly to the production of Ti(III) surface species by vacuum-annealing, as detected by post-catalysis XPS, rather than to Sr/Ba doping at the rutile surface. The vacuum-annealing treatment is proposed to beneficially affect (i) bulk semiconductor TiO2 nanocrystal properties and electron harvesting, (ii) surface TiO2 reactivity towards chloride adsorption and oxidation, and (iii) FTO substrate performance.

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Blue LED light-driven photoelectrocatalytic removal of naproxen from water: Kinetics and primary by-products

Cited by 20 publications

References 26 publications

Photocatalytic degradation of naproxen using TiO2 single nanotubes

Photocatalytic degradation of naproxen using TiO2 single nanotubes

Water Purification of Classical and Emerging Organic Pollutants: An Extensive Review

Photo-Chlorine Production with Hydrothermally Grown and Vacuum-Annealed Nanocrystalline Rutile

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