Capacitive effects of nitrogen doping on cellulose-derived carbon nanofibers

Kuzmenko, Volodymyr; Naboka, Olga; Staaf, Henrik; Haque, Mazharul; Göransson, Gert; Lundgren, Per; Gatenholm, Paul; Enoksson, Peter

doi:10.1016/j.matchemphys.2015.04.006

Cited by 27 publications

(16 citation statements)

References 39 publications

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“…32 Carbon nanobers (CNFs), obtained from electrospun precursors, possess the desired advantages due to their excellent properties: sieve-like nanosized morphology, freestanding nature and wellinterconnected porosity. 33,34 In this study, we present a sustainable and efficient composite carbon material consisting of CNFs and reduced graphene oxide (rGO). It is fabricated in a creative manner via carbonization of the electrospun brous cellulose functionalized with graphene oxide (GO) ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors

et al. 2017

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“…The N (1s) spectrum reveals the presence of the amine group (C–NH 2 (398.56 eV) and ONC (399.74 eV)). The O (1s) spectrum was deconvoluted to four peaks at 530.09, 531.47, 532.28, and 533.47 eV, suggesting the presence of −C–O/–N–O, CO, C–OH, and C–O–C groups, respectively. ,, For Hg, the (4f) spectrum found two peaks of 4f5/2 and 4f7/2 at 105.18 and 101.13 eV, respectively . The results showed that mercury was adsorbed on CDs via oxygen-containing functional groups and amine group in the adsorption of mercury ions. , …”

Section: Resultsmentioning

confidence: 92%

Sequential Injection Analysis for Rapid Determination of Mercury in Skincare Products Based on Fluorescence Quenching of Eco-Friendly Synthesized Carbon Dots

et al. 2023

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This work reports the analysis of mercury using a spectrofluorometric method combined with a sequential injection analysis (SIA) system. This method is based on the measurement of fluorescence intensity of carbon dots (CDs), which is quenched proportionally after adding mercury ions. Herein, the CDs underwent environmentally friendly synthesis using a microwave-assisted approach that provides intensive and efficient energy and shortens reaction time. After irradiation at 750 W for 5 min in a microwave oven, a dark brown CD solution with a concentration of 2.7 mg mL–1 was obtained. The properties of the CDs were characterized by transmission electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and UV–vis spectrometry. We presented for the first time the use of CDs as a specific reagent for the determination of mercury in skincare products with the SIA system to achieve rapid analysis and full automatic control. The as-prepared CD stock solution was diluted 10 times and used as a reagent in the SIA system. Excitation and emission wavelengths at 360 and 452 nm, respectively, were used to construct a calibration curve. Physical parameters affecting the SIA performance were optimized. In addition, the effect of pH and other ions was investigated. Under the optimum conditions, our method showed a linear range from 0.3 to 600 mg L–1 with an R 2 of 0.99. The limit of detection was 0.1 mg L–1. Relative standard deviation was 1.53% (n = 12) with a high sample throughput of 20 samples per hour. Finally, the accuracy of our method was validated by comparison using inductively coupled plasma mass spectrometry. Acceptable recoveries were also presented without a significant matrix effect. This method was also the first time that uses the untreated CDs for the determination of mercury(II) in skincare products. Therefore, this method could be an alternative for mercuric toxic control in other sample applications.

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“…129,[189][190][191] Some nitrogen-containing additives (e.g., g-C 3 N 4 , Li 3 N, and NH 4 Cl) can also be incorporated into the electrospinning process for further regulation of the nitrogen doping level. [192][193][194][195] For polypyrrole (PPy), polyaniline (PANi), PI, polydopamine (PDA), and branched polyethylenimine (bPEI), they are usually post-polymerized or chemically grafted on the electrospun polymer nanofibers, and then undergo a carbonization treatment to obtain hollow NCNFs or to form nitrogen-doped carbon layers on the surface of CNFs. [196][197][198][199][200] For example, the authors' research group designed flexible NCNFs using the electrospun PAN@bPEI nanofibers as the precursors, which delivered superior specific capacitance compared to the pure PAN-derived CNFs, when tested in a three-electrode system (Fig.…”

Section: Single Dopingmentioning

confidence: 99%

Key issues facing electrospun carbon nanofibers in energy applications: on-going approaches and challenges

et al. 2020

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Capacitive effects of nitrogen doping on cellulose-derived carbon nanofibers

Cited by 27 publications

References 39 publications

Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors

Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors

Sequential Injection Analysis for Rapid Determination of Mercury in Skincare Products Based on Fluorescence Quenching of Eco-Friendly Synthesized Carbon Dots

Key issues facing electrospun carbon nanofibers in energy applications: on-going approaches and challenges

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