Graphene-based nanocomposites in analytical extraction processes

Pena‐Pereira, Francisco; Romero, Vanesa; Calle, Inmaculada de la; Lavilla, Isela; Bendicho, Carlos

doi:10.1016/j.trac.2021.116303

Cited by 30 publications

(14 citation statements)

References 93 publications

(104 reference statements)

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“…Furthermore, graphene and GO can be modified or functionalized with the appropriate groups, which facilitates the preparation of hybrid nanoparticles. [ 23 , 24 , 27 , 32 ].…”

Section: Graphene and Its Derivativesmentioning

confidence: 99%

“…In comparison to conventional sorbent materials, graphene-based nanoparticles possess great properties, such as high surface area, enhanced mechanical and chemical stability, and possibility of functionalisation (e.g., hydroxylation, carboxylation, amidation, thiolation, silinization and polymer grafting) to increase their selectivity. Thus, they have found several applications in analytical extraction processes [ 27 , 46 , 47 ]. In the classical SPE technique, GO and rGO can be packed in minicolumns, cartridges and pipette-tips or implemented in polymeric membranes.…”

Section: Preconcentration Of Pb(ii) For Analytical Applicationsmentioning

confidence: 99%

“…Among them, graphene derivatives such as graphene oxide and reduced graphene oxide have been integrated in various sample preparation steps, improving the detection sensitivity and selectivity [ 21 , 22 , 23 , 24 ]. As these nanomaterials utilise mostly one type of interaction, nanocomposites can combine the properties of carbon materials with metal and metal oxide nanoparticles or chelating polymers [ 25 , 26 , 27 ]. This allows for further improvement in efficiency of extraction as a result of the synergistic effects resulting from interactions between different materials.…”

Section: Introductionmentioning

confidence: 99%

“…Different works that provide interesting results for this application are summarized. Interested readers could find more details concerning earlier contributions in the review papers [ 27 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Preconcentration and Removal of Pb(II) Ions from Aqueous Solutions Using Graphene-Based Nanomaterials

Pyrzyńska

2023

Materials

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Direct determination of lead trace concentration in the presence of relatively complex matrices is often a problem. Thus, its preconcentration and separation are necessary in the analytical procedures. Graphene-based nanomaterials have attracted significant interest as potential adsorbents for Pb(II) preconcentration and removal due to their high specific surface area, exceptional porosities, numerous adsorption sites and functionalization ease. Particularly, incorporation of magnetic particles with graphene adsorbents offers an effective approach to overcome the separation problems after a lead enrichment step. This paper summarizes the developments in the applications of graphene-based adsorbents in conventional solid-phase extraction column packing and its alternative approaches in the past 5 years.

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“…Furthermore, graphene and GO can be modified or functionalized with the appropriate groups, which facilitates the preparation of hybrid nanoparticles. [ 23 , 24 , 27 , 32 ].…”

Section: Graphene and Its Derivativesmentioning

confidence: 99%

Section: Preconcentration Of Pb(ii) For Analytical Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preconcentration and Removal of Pb(II) Ions from Aqueous Solutions Using Graphene-Based Nanomaterials

Pyrzyńska

2023

Materials

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“…With this GS, the authors reached recoveries of about 90% for six different benzotriazoles extracted from cosmetics, showing a clear advantage of GS over other separation materials such as carbon nanotubes or C18 columns. 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%

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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Thermoreversible Transformations of the Cyanosubstituted 2‐Oxopyrrole Derivative by the Action of Amines for the Creation of Novel High‐Contrast Coloration/Decoloration Systems

Yu. Belikov,

Milovidova,

Yu. Ievlev

2024

ChemistrySelect

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A new efficient approach to the synthesis of intensely colored 2‐(2‐oxo‐3H‐pyrrol‐3‐ylidene)malononitrile (OP) was developed. Using the reaction of OP with amines, a series of previously unknown colorless organic salts – dicyano(2‐oxo‐2,5‐dihydro‐1H‐pyrrol‐3‐yl)methanides were synthesized, bearing in the structure two fragments of same or diverse amines of different nature (covalent and ionic). TGA‐DTA study of the synthesized salts showed a thermal reversibility of their formation. The introduction of violet OP into paper followed by treatment with amine vapors revealed prospects of using such a system for naked‐eye detection of volatile amines. It was also shown that OP‐based rewritable paper can be created, to which a data can be applied by local heating and erased by the action of amine or temperature.

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Graphene-based nanocomposites in analytical extraction processes

Cited by 30 publications

References 93 publications

Preconcentration and Removal of Pb(II) Ions from Aqueous Solutions Using Graphene-Based Nanomaterials

Preconcentration and Removal of Pb(II) Ions from Aqueous Solutions Using Graphene-Based Nanomaterials

Reduced Graphene Oxide Aerogels Cartridges for Solid Phase Extraction of Benzotriazoles

Thermoreversible Transformations of the Cyanosubstituted 2‐Oxopyrrole Derivative by the Action of Amines for the Creation of Novel High‐Contrast Coloration/Decoloration Systems

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