Reduced graphene oxide coated nickel foam for stir bar sorptive extraction of benzotriazole ultraviolet absorbents from environmental water

Zhang, Qiulin; You, Linna; Chen, Beibei; He, Man; Hu, Bin

doi:10.1016/j.talanta.2021.122332

Cited by 14 publications

(11 citation statements)

References 29 publications

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“…GS, as the reference material, and GA-60%, as the representative rGO aerogel, were selected to perform the evaluation of different elution solvents. These tests were carried out using polar aprotic solvents since they have shown good affinity for UV-benzotriazoles in previous works [ 21 , 23 , 33 , 34 , 35 ]. Specifically, three solvents with different dipole moment—acetonitrile (ACN, 3.92 D), acetone (ACE, 2.8 D) and tetrahydrofuran (THF, 1.75 D)—were chosen.…”

Section: Resultsmentioning

confidence: 99%

“…While keeping the same syringe filter configuration, the elution time was now increased up to approx. 10 min by decanting the solvent through the material bed by gravity (drop by drop), which increases the contact time and favors the interaction between the loaded material and the elution solvent [ 23 , 34 , 36 ]. Higher recovery percentages were then obtained for both GA-60% and G-GA-40% ( Figure 8 a): (i) when increasing the elution time, the recovery percentages of the different UV-benzotriazoles show the same trend for the two extractants, with significant differences only found for UV329; (ii) the recovery of UV234 increases from about 70 to 85% for both materials; (iii) UV329 is the most influenced compound, doubling (at least) its recovery percentage to 64% and 97% for GA-60% and G-GA-40%, respectively; and (iv) a slight increase was detected for UVP, but still below 10% of recovery.…”

Section: Resultsmentioning

confidence: 99%

“…To reach such performance with both aerogels, 0.8 mL of the solvent (and 10 min of elution time) was required. When compared to the reported SPE methodologies for the extraction of UV-benzotriazoles, which include very long extraction times and even the use of ultrasounds [ 23 , 34 , 36 ] (i.e., 60, 35 and 65 min, respectively), the rapid loading and elution of the rGO aerogel cartridges greatly benefit their implementation. Besides the limitation of these materials when working with small and more polar molecules (e.g., UVP), GAs are a highly competitive option when non-polar or large molecules are involved.…”

Section: Resultsmentioning

confidence: 99%

“…However, the small size and light weight of the rGO sheets limit the real application of these GSs, especially under high-pressure conditions [ 22 ]. To overcome these drawbacks, composite materials containing graphene/rGO have been recently explored [ 22 , 23 , 24 ], including a nickel foam coated with graphene for the extraction of UV-benzotriazoles [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide Aerogels Cartridges for Solid Phase Extraction of Benzotriazoles

et al. 2023

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UV-benzotriazoles have been identified as water micropollutants that cause serious problems for human health and the environment. Their low concentration in water bodies complicates their detection by direct water analysis, slowing the corrective actions to avoid bioaccumulation. In this regard, the use of graphene-based materials with a high affinity for non-polar molecules has been demonstrated to be a potential tool for the optimal separation and concentration of this type of molecules in solid phase extraction (SPE) processes. This work evaluates the potential of novel reduced graphene oxide aerogels (rGO) as extractants of mixtures of three UV-benzotriazoles in water at low concentrations. These rGO aerogels incorporate graphenic domains into a tough structure of polymeric chains by adding graphene oxide during the synthesis of resorcinol-formaldehyde gels. Aerogels with a different content and ordering of graphenic domains were obtained and characterized using Raman, XRD, SEM and nitrogen adsorption isotherms (−196 °C). The rGO aerogels that performed better as solid phase extractants were those containing 60% rGO. Aerogels with lower rGO contents (40%) required a high-temperature (2000 °C) treatment to render competitive results. The SPE methodology using selected rGO aerogels was optimized by varying the elution solvent, elution time and volume. The best performances, i.e., recoveries of 80–100% and enrichment factors of 12.5–50, were accomplished when using 0.8 mL of tetrahydrofuran (THF) as an elution solvent. As a result, a fast (10 min) and simple extraction method of UV-benzotriazoles in water was attained, achieving a detection limit of 1 ng mL−1. Selected aerogels were finally tested for the SPE of spiked samples of river waters, showing a similar performance to that observed with synthetic mixtures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide Aerogels Cartridges for Solid Phase Extraction of Benzotriazoles

et al. 2023

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“…SBSE is commonly composed of a polydimethylsiloxane film, coated onto a glass jacket with an incorporated magnet core, in a cylindrical or disk shape [ 7 – 9 ]. The scientific community has recently introduced novel SBSE coatings to exploit more selective materials, such as molecularly imprinted polymers [ 10 , 11 ], metal organic frameworks [ 12 , 13 ], carbonaceous materials [ 14 , 15 ] and polymer monoliths [ 16 ]. However, the use of highly selective biomaterials such as antibodies (Abs) [ 17 ] or aptamers [ 18 , 19 ] has been only occasionally used.…”

Section: Introductionmentioning

confidence: 99%

3D printed spinning cup-shaped device for immunoaffinity solid-phase extraction of diclofenac in wastewaters

et al. 2022

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This article reports current research efforts towards designing bespoke microscale extraction approaches exploiting the versatility of 3D printing for fast prototyping of novel geometries of sorptive devices. This is demonstrated via the so-called 3D printed spinning cup-based platform for immunoextraction of emerging contaminants using diclofenac as a model analyte. A new format of rotating cylindrical scaffold (containing a semispherical upper cavity) with enhanced coverage of biorecognition elements, and providing elevated enhancement factors with no need of eluate processing as compared with other microextraction stirring units is proposed. Two distinct synthetic routes capitalized upon modification of the acrylate surface of stereolithographic 3D printed parts with hexamethylenediamine or branched polyethyleneimine chemistries were assayed for covalent binding of monoclonal diclofenac antibody.Under the optimized experimental conditions, a LOD of 108 ng L−1 diclofenac, dynamic linear range of 0.4–1,500 µg L–1, and enrichment factors > 83 (for near-exhaustive extraction) were obtained using liquid chromatography coupled with UV–Vis detection. The feasibility of the antibody-laden device for handling of complex samples was demonstrated with the analysis of raw influent wastewaters with relative recoveries ranging from 102 to 109%. By exploiting stereolithographic 3D printing, up to 36 midget devices were fabricated in a single run with an estimated cost of mere 0.68 euros per 3D print and up to 16 €/device after the incorporation of the monoclonal antibody. Graphical abstract

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Stir Bar Sorptive Extraction

Benedé,

Lucena,

Cárdenas

et al. 2024

Microextraction Techniques

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Reduced graphene oxide coated nickel foam for stir bar sorptive extraction of benzotriazole ultraviolet absorbents from environmental water

Cited by 14 publications

References 29 publications

Reduced Graphene Oxide Aerogels Cartridges for Solid Phase Extraction of Benzotriazoles

Reduced Graphene Oxide Aerogels Cartridges for Solid Phase Extraction of Benzotriazoles

3D printed spinning cup-shaped device for immunoaffinity solid-phase extraction of diclofenac in wastewaters

Stir Bar Sorptive Extraction

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