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Carbon Nanofiber - Crossref

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Last Updated: 15 August 2022

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Polyethyleneimine-impregnated activated carbon nanofiber composited graphene-derived rice husk char for efficient post-combustion CO 2 capture

This report discusses the creation of polyethyleneimine husk char/activated carbon nanofiber composites by electrospinning and physical activation techniques as well as its absorption capabilities against CO 2. The resultant ACNF composite with 1% of GRHC has a smaller average fiber diameter, with more surface area of 597 m 2 /g and a V micro of 0. 2606 cm 3 /g, which is superior to pristine ACNFs. At atmospheric pressure and 25u00b0C, CO 2 uptakes of 142 cm 3 /g was noted, much higher than that of pristine ACNF/GRHC0. 01's 69 cm 3 /g. Notably, the adsorption efficiency of CO 2 is directly proportional to the pressure rise, but it is inversely proportional to the increased temperature. Both amine-impregnated and nonimpregnated GRHC/ACNFs tested the pseudo first-order kinetic model at 1 bar, although the pseudo first-order kinetic model at 15 bar was the most suitable; however, the pseudo second-order kinetic model was the most effective at 15 bars.

Source link: https://doi.org/10.1515/ntrev-2022-0055


Ag@AgCl nanoparticles grafted on carbon nanofiber: An efficient visible light plasmonic photocatalyst via bandgap reduction

Abstract This paper explains an electrospinning, heat treament, and a subsequent in-situ chemical oxidation program resulted in the synthesized silver@silver chloride/carbon nanofiber hybrid. AgNO3/PAN was carbonized and reduced to Ag/CNF, but Ag/CNF was then partially oxidized to Ag/CNF, and Ag/CNF was reduced to Ag/CNF, in which Ag@AgCl nanoparticles were uniformly bounded to CNFs, according to the experimental findings. AgCl/CNF was employed for Na2S2O8 activation under visible light irradiation to treat rhodamine B. A new mechanistic route for RhB degradation was suggested.

Source link: https://doi.org/10.1088/1361-6528/ac86db


Synergetic Effect of Carbon Dot at Cellulose Nanofiber for Sustainable Metal-free Photocatalyst

Abstract Introduction By attaching carbon dot to cellulose nanofiber by simple in-situ synthesis, a metal-free photocatalyst was synthesized. The fibrous framework of CDs was unchanged, with the graphitic core and functional groups of CDs controlled along the precursor concentrations. The CD on the CNF surface enhanced the morphological stability of CNF under UV irradiation as well. The CDCNF aerogel synthesized from CDCNF had a good re-usability without sacrificeing its photocatalytic performance. The synthesized CDCNF composite demonstrated a superior potential for using cellulose nanofiber to produce a durable metal-free photocatalyst.

Source link: https://doi.org/10.21203/rs.3.rs-404493/v2


Synergetic Effect of Carbon Dot at Cellulose Nanofiber for Sustainable Metal-free Photocatalyst

Abstract From attaching carbon dot to cellulose nanofiber by simple in-situ synthesis, a metal-free photocatalyst was synthesized. The fibrous structure of CNF remained intact, with the graphitic core and functional groups of CD on CNF being controlled along the precursor concentration. The excited electrons in the CD were transferred to the CNF and delayed the radiative recombination, according to the company. Under UV irradiation as well, the CD on the CNF surface enhanced the morphological stability of CNF under UV irradiation as well. The aerogel synthesized from CDCNF had excellent re-usability without sacrificed its photocatalytic effectiveness.

Source link: https://doi.org/10.21203/rs.3.rs-404493/v1


Flexible carbon nanofiber yarn electrodes for self-standing fiber supercapacitors

Polyacrylonitrile nanofiber yarns were made by twisting the nanofiber mat strips made in the electrospinning machine, which was shown in this study. PAN nanofiber yarns were converted into carbon nanofiber yarns by stabilization and carbonization processes. The electrochemical results of CNF yarn in 1 m H 2 SO 4 electrolyte was determined using cyclic voltammetry and galvanostatic charge/discharge test methods on a three-electrode device. CNF yarn electrodes can be used in a variety of electronic applications, including energy harvesting, energy storage, and sensors, due to their superior characteristics, such as high surface area, lightness, and adaptability.

Source link: https://doi.org/10.1177/15280837221094062


Hemoglobin assisted carbon nanofiber preparation for selective detection of miRNA molecules

In this respect, hemoglobin-assisted carbon nanofibers were produced by electrospinning of the precursor polyacrylonitrile/hemoglobin hybrid nanofibers and the subsequent heat treatment process. PAN nanofibers' low ratio Hb addition caused a catalytic reaction that occurred during the enactment of more graphitic structure during the carbonization process. Differential pulse voltammetry measurements were used to determine miRNA molecules' degradation signals in Guanine. In this regard, the addition of anti-miRNA molecules onto the CNFs immobilized screen-printed electrodes and a subsequent hybridization of the attached anti-miRNA with miRNA molecules were carried out. Instead of using CNFs, the improvement of the oxidation signal level was observed by using Hb-CNFs rather than using CNFs. That could be attributed to the increase in the graphitic level with low Hb addition to PAN/Hb nanofibers, a precursor to the carbonization reaction.

Source link: https://doi.org/10.1177/15280837211049566


Carbon nanofiber reinforced thermoplastic elastomer based on polypropylene/polybutadiene blend: theoretical modeling of Young’s modulus of the nanocomposites with respect to the orientation and agglomeration of carbon nanofiber

Abstract The effect of carbon nanofibers' addition to a thermoplastic elastomer prepared by melt blending process was investigated. CNFs that were tested by transmission electron microscopy demonstrate uniform dispersion of CNFs in the PP matrix. With an increase in filler content up to 3 wt%, Tensile strength and Young's modulus of the PP/BR blend adds. The introduction of CNF in the PP/BR blend leads to increased viscosity, storage modulus, and loss modulus in the low-frequency region, according to a dynamic rheological analysis.

Source link: https://doi.org/10.1515/polyeng-2017-0408


Long term hydrothermal effect on the mechanical and thermo-mechanical properties of carbon nanofiber doped epoxy composites

Abstract The effect of water absorption on the mechanical and thermomechanical stability of carbon nanofibre doped epoxy composites was investigated. After removing traveling specimens from a water-beaker, all the composite specimens survived saturation for a long time of six months, although composite change of composites was still monitored every month. Comparing to their unexposed specimens, the results revealed a general decrease in flexural modulus and strength, hardness, storage modulus, and glass transition temperature for seawater exposed specimens due to absorption of seawater.

Source link: https://doi.org/10.1515/polyeng-2017-0037

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions