Fabrication of bifunctional macroporous adsorption resin via grafting carbon dot and application in the detection and adsorption of iron (III) ion

Wang, Hongwei; Huang, Chao; Ma, Shujuan; Guo, Shengwei; Gong, Bolin; Ou, Junjie

doi:10.1016/j.mtcomm.2022.105220

Cited by 5 publications

(2 citation statements)

References 60 publications

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“…A special case of these (iii) types of compounds It is of the utmost necessity to develop effective strategies for the detection and removal of iron(III) in water environments. These strategies included the use of different separation technologies from precipitation to adsorption, with recent publications considering liquid-liquid extraction using (acidic, solvation, and ionic liquid-based extractants) [5][6][7][8][9], ion-exchange resins (Lewatit TP-208) [2], adsorption (carbon derivatives, zeolites, and microgels) [10][11][12][13], and membrane [4,14] procedures.…”

Section: Introductionmentioning

confidence: 99%

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Robla

2023

Membranes

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The transport of iron(III) from aqueous solutions through pseudo-emulsion-based hollow fiber with strip dispersion (PEHFSD) was investigated using a microporous hydrophobic hollow fiber membrane module. The pseudo-protic ionic liquid RNH3HSO4− dissolved in Solvesso 100 was used as the carrier phase. This pseudo-protic ionic liquid was generated by the reaction of the primary amine Primene JMT (RNH2) with sulphuric acid. The aqueous feed phase (3000 cm3) containing iron(III) was passed through the tube side of the fiber, and the pseudo-emulsion phase of the carrier phase (400 cm3) and sulphuric acid (400 cm3) were circulated through the shell side in counter-current operational mode, using a single hollow fiber module for non-dispersive extraction and stripping. In the operation, the stripping solution (sulphuric acid) was dispersed into the organic membrane phase in a tank with a mixing arrangement (a four-blade impeller stirrer) designed to provide strip dispersion. This dispersed phase was continuously circulated from the tank to the membrane module in order to provide a constant supply of the organic solution to the fiber pores. Different hydrodynamic and chemical parameters, such as feed (75–400 cm3/min) and pseudo-emulsion phases (50–100 cm3/min) flows, sulphuric acid concentration in the feed and stripping phases (0.01–0.5 M and 0.5–3 M, respectively), metal concentration (0.01–1 g/L) in the feed phase, and PPILL concentration (0.027–0.81 M) in the carrier phase, were investigated. From the experimental data, different diffusional parameters were estimated, concluding that the resistance due to the feed phase was not the rate-controlling step of the overall iron(III) transport process. It was possible to concentrate iron(III) in the strip phase using this smart PEHFSD technology.

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Section: Introductionmentioning

confidence: 99%

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Robla

2023

Membranes

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“…For example, recent studies demonstrated that sulphur and nitrogen-doped CDs could be used to image cancer cells, supporting their potential use as a diagnostic tool [14][15][16]. Due to their small size and low toxicity, it is speculated that CDs can readily enter cells within tissues and can cross both the glomerular filtration and blood-brain barriers [17][18][19][20][21]. The entry mechanism of CDs will vary with size, surface charge, and surface functionalization, as well as the cell type and their microenvironment (figure 1).…”

Section: Introductionmentioning

confidence: 99%

Advances in the design and use of carbon dots for analytical and biomedical applications

Adeola,

Clermont-Paquette,

Piekny

et al. 2023

Nanotechnology

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Carbon dots (CDs) have garnered significant interest for their potential use in multiple applications due to their size, fluorescent properties, high photostability, low toxicity and biocompatibility. CDs can be tailored for specific needs, as they can be synthesized with diverse precursors and techniques for functionalization. Since the applications of CDs are rapidly expanding, this review highlights recent developments in this burgeoning field. Specifically, we describe advances in CD synthesis tailored for applications that include pH and temperature sensing, biochemical analysis, and bioimaging. We also discuss various challenges and practical solutions that will drive CD-based research forward. Challenges include the lack of standardized synthesis and purification methods for CDs, the lack of clarity regarding their mechanism of action, and procedural flaws in their applications. In conclusion, we provide recommendations for collaboration among disciplines to bridge existing knowledge gaps and address the key challenges required for CDs to be fully commercialized.

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Detection and adsorption of florfenicol in milk using bifunctional carbon dot–doped molecularly imprinted polymers

Li,

Sun,

Wang

et al. 2024

Electrophoresis

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Detection of florfenicol (FF) residues in animal‐derived foods, as one of the most widely used antibiotics, is critically important to food safety. The fluorescent molecularly imprinted polymer (MIP) was synthesized by surface‐initiated atom transfer radical polymerization technique with poly(glycidyl methacrylate‐co‐ethylene glycol dimethacrylate) microspheres, 4‐vinylpyridine, ethylene glycol dimethacrylate, and FF as the matrix, functional monomer, crosslinker, and template molecule, respectively. Meanwhile, N–S co‐doped carbon dot (CD) was synthesized with triammonium citrate and thiourea as precursors under microwave irradiation at 400 W for 2.5 min and then integrated into FF‐MIP to obtain CD@FF‐MIP. For comparison, non‐imprinted polymer (NIP) without FF was also prepared. The adsorption capacity of CD@FF‐MIP to FF reached 53.1 mg g−1, which was higher than that of FF‐MIP (34.7 mg g−1), whereas the adsorption capacity of NIP was only 17.3 mg g−1. The adsorption equilibrium of three materials was reached within 50 min. Particularly, CD@FF‐MIP exhibited an excellent fluorescence quenching response to FF in the concentration range of 3–50 µmol L−1. As a result, CD@FF‐MIP was successfully utilized to extract FF in milk samples, which were analyzed by high‐performance liquid chromatography. The standard recoveries were 95.8%–98.2%, and the relative standard deviation was 1.6%–4.2%. The method showed the advantages of simple operation, high sensitivity, excellent selectivity, and low cost, and also demonstrated a great application prospect in food detection.

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Fabrication of bifunctional macroporous adsorption resin via grafting carbon dot and application in the detection and adsorption of iron (III) ion

Cited by 5 publications

References 60 publications

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Advances in the design and use of carbon dots for analytical and biomedical applications

Detection and adsorption of florfenicol in milk using bifunctional carbon dot–doped molecularly imprinted polymers

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