Preparation of amidoximated coaxial electrospun nanofibers for uranyl uptake and their electrochemical properties

Hu, Lin; Yan, Xuewu; Yao, Chuan-Guang; Deng, Shengyuan; Gao, Xinmei; Zhang, Xueji; Shan, Dan

doi:10.1016/j.seppur.2016.07.024

Cited by 27 publications

(7 citation statements)

References 22 publications

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“…The stretching vibration peaks at 2245 cm −1 could be attributed to CN, indicating the existence of PAN. 19 Compared to PAN@PS, the FTIR spectrum of PAN/ Co(acac) 2 @PS revealed two additional peaks at 1261 and 1519 cm −1 , which respectively corresponded to O−C−C−C O and CO stretching vibration peaks. 20 In addition, after the in situ polymerization of PPy, two new characteristic absorption peaks at 964 and 1300 cm −1 were respectively attributed to the vibration peak of C−H and the C−C asymmetric stretching vibration of PPy.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

Cobalt Nanoparticles Decorated “Wire in Tube” Framework as a Multifunctional Sulfur Reservoir

Luo

Liu

Guan

et al. 2022

ACS Sustainable Chem. Eng.

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The various designs of sulfur host materials for the lithium−sulfur (Li−S) battery have attracted ever-increasing interest in alleviating the fatal shuttle effect of lithium polysulfide (LiPS) intermediates. Designing host materials for sulfur cathodes needs particular attention in both physical confinement and surface chemistry. Herein, the Co, N codoped "wire in tube" carbon fiber (WIT-Co) is rationally fabricated and serves as the sulfur host. Benefiting from the synergistic effects of excellent LiPS absorption and electrocatalysis capability, the WIT-Co/S cathode reveals a high initial capacity of 1462 mAh g −1 at 0.1 C and stable cycling performance of 650 mAh g −1 at 2.0 C after 400 cycles with a lowcapacity decay of 0.021% per cycle. Notably, even with the high sulfur loading of 5.6 mg cm −2 and low electrolyte/sulfur ratio of 5 μL mg −1 , the WIT-Co/S electrode still exhibits an excellent areal capacity of 4.8 mAh cm −2 at 0.2 C after 100 cycles. This work provides a superior structure of the sulfur host, which not only accelerates the conversion of LiPSs but also alleviates the shuttle effect, therefore facilitating the practical application of Li−S batteries.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Cobalt Nanoparticles Decorated “Wire in Tube” Framework as a Multifunctional Sulfur Reservoir

Luo

Liu

Guan

et al. 2022

ACS Sustainable Chem. Eng.

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“…The spectrum of the Co(acac) 3 exhibited asymmetric and symmetric stretching vibrations of the chelate group (C=C) and (C=O + C–H) which appeared at 1573 and 1513 cm −1 , respectively [22–24]. The intensity of the nitrile peak of PAN showed peaks at 2250 cm −1 , which was due to the presence of C≡N [9]. Those band at 750, 2921, and 1454 cm −1 were ascribed to the C–H out plane normal vibrations of the phenyl groups, CH 3 asymmetric stretching and bending vibrations by PS [23].…”

Section: Resultsmentioning

confidence: 99%

“…Li [7] and Liu [8] fabricated fibers containing Cu and Fe 2 O 3 via bubble electrospinning. Lin et al [9] fabricated core-shell nanofibers with PS as core and PAN as shell, and Wu et al [10] explored the effect of three polymer systems, Poly(m-phenylene isophthalamide) (Nomex)/polyurethane (TPU), polystyrene (PS)/TPU, and polyacrylonitril (PAN)/TPU, on the formation process of helical nanofibers via co-electrospinning.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of AMT/Co(acac)3-Loaded PAN/PS Micro-Nanofibers with Large through-Pores

et al. 2019

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This study focused on the fabrication and characterization of ammonium metatungstate hydrate (AMT) combined with cobalt(III) acetylacetonate (Co(acac) 3 )-loaded electrospun micro-nanofibers. The morphologies, structures, element distribution, through-pore size, and through-pore size distribution of AMT/Co(acac) 3 -loaded PAN/PS micro-nanofibers were investigated by a combination of field emission scanning electron microscopy (FESEM), flourier transformation infrared (FTIR) spectroscopy, energy disperse spectroscopy (EDS), through-pore size analyzer, and so on. These micro-nanofibers have many advantages in their potential application as electro-catalysts. The porous and large thorough-pore will benefit for effective electrolyte penetration, in addition to promoting gas bubbles evolving and releasing from catalyst surface timely.

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“…Additionally, because of their unique physical properties, fibrous adsorbents can be fabricated into various shapes and lengths to meet the requirements of different processes . To improve the sorption selectivity and capacity of fibrous adsorbents, studies of various fibrous materials prepared by chemical grafting, radiation-induced graft polymerization (RIGP), ,, electrospinning, , and other methods for the sorption of uranium from aqueous solution have been performed. Although RIGP is considered to be the most easily implemented, an efficient, and popular technology for modifying fibrous adsorbents, chemical grafting is still an appropriate method due to its moderate reaction conditions and low cost.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Amidoxime-Grafted Activated Carbon Fibers for Efficient Recovery of Uranium(VI) from Aqueous Solution

Lü

Zhang

Reda

et al. 2017

Ind. Eng. Chem. Res.

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A novel fibrous sorbent, amidoxime-grafted activated carbon fibers (ACFs-AO), was prepared using a chemical grafting method and tested for the efficient removal of uranium from aqueous solution. The sorbent was characterized using X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, elemental analysis, thermogravimetric analysis, and Brunauer–Emmett–Teller. The effects of pH, contact time, initial concentration, and temperature on the sorption of U(VI) were investigated. The sorption of U(VI) on ACFs-AO obeyed the pseudo-second-order model and Langmuir isotherm. The sorption capacity of ACFs-AO for U(VI) (about 191.6 mg/g) was much higher than that of activated carbon fibers (ACFs) (about 70.52 mg/g), which was mainly attributed to surface complexation between U(VI) and the amidoxime group on ACFs-AO. Additionally, the thermodynamic parameter results showed that the sorption process of U(VI) was spontaneous, feasible, and endothermic. Moreover, ACFs-AO adsorbed U(VI) selectively in an aqueous solution containing competitive ions, and was regenerated and reused efficiently. The findings of this work indicate that ACFs-AO could be a promising sorbent for the effective removal of U(VI) from aqueous solution.

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Preparation of amidoximated coaxial electrospun nanofibers for uranyl uptake and their electrochemical properties

Cited by 27 publications

References 22 publications

Cobalt Nanoparticles Decorated “Wire in Tube” Framework as a Multifunctional Sulfur Reservoir

Cobalt Nanoparticles Decorated “Wire in Tube” Framework as a Multifunctional Sulfur Reservoir

Preparation and Characterization of AMT/Co(acac)3-Loaded PAN/PS Micro-Nanofibers with Large through-Pores

Synthesis of Amidoxime-Grafted Activated Carbon Fibers for Efficient Recovery of Uranium(VI) from Aqueous Solution

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