New composite materials based on activated carbon fibers with specific adsorption and catalytic properties

Zemskova, L. A.; Artemyanov, Andrey P.; Voit, A. V.; Шлык, Д. Х.

doi:10.1016/j.matpr.2018.08.019

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…Activated carbon fibers (ACFs) are a new type of fibrous carbonaceous adsorbent . Compared with traditional granular activated carbon, they have smaller fiber diameter and more concentrated pore distribution, larger specific surface area, faster adsorption kinetics, and larger adsorption capacity. , They can be easily and fast regenerated, maintain the original adsorption performance after repeated adsorption and desorption, and have good alkali and acid resistance. In addition, in comparison with granular and powered activated carbon, ACFs can be made into various forms of activated carbon cloth, felt, etc. , Moreover, abundant hydrophilic oxygen-containing functional groups with electronegative polarity on their surface contribute to the adsorption of heavy metals .…”

Section: Introductionmentioning

confidence: 99%

Functionalized Activated Carbon Fibers by Hydrogen Peroxide and Polydopamine for Efficient Trace Lead Removal from Drinking Water

et al. 2021

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To achieve efficient and selective trace heavy metals removal from drinking water, a low-cost purification material polydopamine/activated carbon fibers (PDA/H-ACF) was successfully prepared by polymerizing dopamine on the surface of activated carbon fibers pretreated with hydrogen peroxide. The morphology, phase, surface functional groups, specific surface, and pore size distribution of the as-prepared sample were analyzed using FESEM, XPS, BET and pore size distribution test (PST), and FTIR, and orthogonal experiments were used to investigate the influences of concentration of H 2 O 2 , pretreatment time, and reflux temperature on trace lead removal. The results showed that the sample pretreated under optimized conditions could produce different pore structures, and the content of functional group −COOH obviously increased. After further modification by polydopamine, the contents of −NH−, −NH 2 , and −OH functional groups on the surface obviously enhanced, which were beneficial to increase adsorption site and promote trace lead removal. The effluent lead concentration decreased from initial 150 to 3.18 ppb within 5 min, meeting the requirement of NSF International Standard/American National Standard for Drinking Water Treatment Units (NSF/ANSI 53−2020) (5 ppb). The isothermal adsorption process and adsorption kinetics could be well-fitted by the Langmuir isotherm and pseudo-second-order kinetics model, indicating that the adsorption process of trace lead by PDA/H-ACF belonged to monolayer and chemical adsorption. Moreover, the as-prepared PDA/H-ACF also showed superior trace lead adsorption performance in the presence of high concentration competitive metal ions, in a wide pH range and in tap water, and therefore had good application prospect in the field of drinking water purification.

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Section: Introductionmentioning

confidence: 99%

Functionalized Activated Carbon Fibers by Hydrogen Peroxide and Polydopamine for Efficient Trace Lead Removal from Drinking Water

et al. 2021

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“…In addition, carbon materials have the ability to combine different hybrid orbitals with various atoms, so carbon materials are not only useful for adsorption of solid pollutants [117,128], but also can be used in gas separation in addition to heterogeneous ions [61]. For examples, carbon fiber modified with Mn and Mo can experimentally purify arsenic in arsenic solution with a low concentration; the decontamination effect of 3chlorophenol solution in the heterogeneous Fenton-process is improved using Fe/Fe oxide modified carbon fiber as a catalyst [129]. Also carbon materials can even be used as a hydrogen storage material because of their strong adsorption capacity [130].…”

Section: Adsorbing Materialsmentioning

confidence: 99%

Carbon materials: structures, properties, synthesis and applications

Jiang¹,

Yin²,

Qin³

2023

Manufacturing Rev.

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As one of the most versatile elements, carbon materials occupy the most plentiful allotropies composed of pure or mixed hybridization orbitals of sp1/sp2/sp3. The design and synthesis of new carbon materials may be stimulated based on a deeper understanding of underlying structures and related properties. In this review, the initial early discoveries of carbon materials are examined based on their hybridization of orbitals. According to the type of hybridization, the discovered carbon materials are firstly classified and introduced in detail based on their crystal structures. Secondly, its physical and chemical properties, mainly including mechanical properties, optical properties and electronic properties, are reviewed. Thirdly, the existing methods of predicting carbon structure and synthesizing carbon materials are classified and summarized, and some typical carbon materials predicted or prepared are discussed respectively. Then, the main applications of newly synthesized carbon materials in the last two decades are classified and summarized, and the microstructure is linked with the macro properties and specific applications. Finally, the future research opportunities for carbon materials and their potential applications are prospected from the aspects of the gap between theoretical prediction and preparation, the current research hotspot of carbon materials and the incomplete application of carbon materials. It is the authors' intention for this review paper to serve not only as a valuable reference for research into carbon materials and related composites, but also as a guidance for novel materials design at the atomic level.

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“…Moreover, MnO 2 has been successfully introduced into the structure of different carriers—for instance cellulose, biochar, chitin, chitosan, alginate beads, activated carbon, carbon fibers and nanotubes, graphene, polyester fiber, ion exchange resins, as well as poly- (vinyl alcohol) and (vinyl pyrrolidone). The obtained materials have been exploited as versatile sorbents for, inter alia, Cd 2+ , Cu 2+ , Li + , Ni 2+ , Pb 2+ , Sr 2+ , Zn 2+ , As(III), As(V) and anionic dyes from water [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. We chose a simple HIX synthesis method which is based on ion exchange reaction of carboxylic functional groups with Mn 2+ followed by an oxidation/disproportionation reaction in the presence of MnO 4 − .…”

Section: Introductionmentioning

confidence: 99%

Adsorptive-Oxidative Removal of Sulfides from Water by MnO2-Loaded Carboxylic Cation Exchangers

2020

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Hybrid ion exchangers (HIX) containing manganese(IV) oxide (MnO2) based on macroporous and gel-type carboxylic cation exchangers as supporting materials were obtained. The hybrid materials were characterized using scanning electron microscopy with energy dispersive spectrometry (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD) and nitrogen adsorption isotherms at 77 K and mercury porosimetry. HIX with introduced MnO2 (20.0–32.8 wt% Mn) were tested for removal of dissolved sulfides from anoxic aqueous solutions with 100–500 mg S2−/dm3 concentrations. The process proceeded effortlessly at pH 10–13 despite unfavorable electrostatic interactions of the reactants. The highest exhibited sorption capacity was 144.3 ± 7.1 mg S2−/g. Approximately 65% of dissolved sulfides were oxidized to S2O32− ions and repelled from HIX structure. On average, 13% of sulfide removal products were adsorbed by the MnO2 surface. The impact of MnO2 load and the ionic form of HIX functional groups on removal of sulfides and resulting products was examined. The mechanism of the process is suggested.

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New composite materials based on activated carbon fibers with specific adsorption and catalytic properties

Cited by 3 publications

References 16 publications

Functionalized Activated Carbon Fibers by Hydrogen Peroxide and Polydopamine for Efficient Trace Lead Removal from Drinking Water

Functionalized Activated Carbon Fibers by Hydrogen Peroxide and Polydopamine for Efficient Trace Lead Removal from Drinking Water

Carbon materials: structures, properties, synthesis and applications

Adsorptive-Oxidative Removal of Sulfides from Water by MnO2-Loaded Carboxylic Cation Exchangers

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