Optimization of stabilization conditions for electrospun polyacrylonitrile nanofibers

Wu, Meiyu; Wang, Qiaoying; Li, Kaina; Wu, Yiqiong; Liu, Haiqing

doi:10.1016/j.polymdegradstab.2012.05.001

Cited by 187 publications

(132 citation statements)

References 21 publications

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“…52,53 This polymer has been previously investigated for the application of supercapacitor electrodes and CO 2 capture. For this purpose, polyacrylonitrile (PAN) has been introduced as a nitrogen-carbon dual precursor due to its low cost, enriched nitrogen content, superior physical, mechanical and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Highly porous N-doped carbons impregnated with sodium for efficient CO₂ capture

Kim

Lee

2015

J. Mater. Chem. A

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Highly porous sodium-impregnated and N-doped carbon sorbents (SNSs) were prepared by KOH activation of polyacrylonitrile (PAN), followed by NaOH impregnation of the activated N-doped carbons. These new types of materials were investigated as sorbents for CO 2 capture. Particularly, SNS2-20 prepared with the KOH/PAN ratio of 2 at 700 C and 20 wt% NaOH based on the weight of the activated carbon exhibited the adsorption capacity of 6.84 and 4.48 mmol g À1 at 0 and 25 C under ambient pressure. Among the carbon sorbents reported to date, it showed the highest CO 2 uptake of 3.03 and 1.90 mmol g À1 at 0 and 25 C under a typical pressure condition of post-combustion flue gas (0.15 bar CO 2 ). The enhanced CO 2 uptake is due to high porosity caused by KOH activation, enriched pyridonic/pyrrolic nitrogen contents, and strong basic sites generated by NaOH impregnation. Moreover, CO 2 /N 2 selectivities of 59.5, 68.9 and 79.4 at 0, 25 and 50 C were achieved for the gas mixture (CO 2 : N 2 ¼ 15 : 85) according to the ideal adsorbed solution theory (IAST). The consecutive adsorption-desorption cycle experiments using SNS2-20 showed almost unaltered CO 2 uptake capacities. Combined with its simple preparation, the high CO 2 adsorption capacity and selectivity of the synthesized SNS2-20 could provide potential for practical applications of CO 2 capture and storage.

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Section: Introductionmentioning

confidence: 99%

Highly porous N-doped carbons impregnated with sodium for efficient CO₂ capture

Kim

Lee

2015

J. Mater. Chem. A

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“…Many factors such as precursor materials (23-25), thermal conditions (i.e., stabilization and carbonization ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 4 temperature) (26,9), diameter of nanofibers (27), pattern of nanofibrous final mat (9) as well as the addition of some elements in the structure and the immobilization of nanoparticles on nanofiber surface (12,28,29) affect the final characteristics and consequently the applications of electrospun carbon nanofibers. In other hand, surface functionalization of electrosoun CNFs may also has significant effects on their final properties.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of PAN-Based Electrospun Carbon Nanofibers by Acid Oxidation: Study of Structural,Electrical and Mechanical Properties

Mirzaei

Sorouri

et al. 2015

Fullerenes, Nanotubes and Carbon Nanostructures

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Electrospun carbon nanofibers (ECNFs) have many qualities that make them attractive for applications in various fields of technology. For many applications, it is necessary to modify the surface of CNFs by chemical functionalization. Here, a systematic functionalization of polyacrylonitrile (PAN) based ECNFs by oxidation in concentrated nitric acid was examined.The effects of oxidation on the microstructural, electrical and mechanical characteristics have been studied. The Fourier transform infrared spectroscopy results revealed the time-dependent functionalization of ECNFs. However, according to the scanning electron microscopy there was no considerable change on the surface morphology of CNFs due to the functionalization. While the microstructures as well as electrical and mechanical properties were severely dependent on oxidation duration according to the X-ray diffraction and Raman spectroscopies as well as conductivity and mechanical strength measurements, respectively. Increase in oxidation duration led to more structural disorders and noticeable decreases in electrical conductivity and mechanical strength.

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“…The asymmetrical spectrum shape at high B.E. region is ascribed to the remaining of C≡N groups in the carbonized fibers [32]. The synthesized nanostructured material was characterized by cyclic voltammetry to confirm the typical electrochemical response for Pt.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive hydrogen peroxide sensor based on a glassy carbon electrode modified with platinum nanoparticles on carbon nanofiber heterostructures

Yang

Yuan

et al. 2015

Microchim Acta

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We are presenting a sensor for hydrogen peroxide (H 2 O 2 ) that is based on the use of a heterostructure composed of Pt nanoparticles (NPs) and carbon nanofibers (CNFs). High-density Pt NPs were homogeneously loaded onto a three-dimensional nanostructured CNF matrix and then deposited in a glassy carbon electrode (GCE). The resulting sensor synergizes the advantages of the conducting CNFs and the nanoparticle catalyst. The porous structure of the CNFs also favor the high-density immobilization of the NPs and the diffusion of water-soluble molecules, and thus assists the rapid catalytic oxidation of H 2 O 2 . If operated at a working voltage of −0.2 V (vs. Ag/AgCl), the modified GCE exhibits a linear response to H 2 O 2 in the 5 μM to 15 mM concentration range (total analytical range: 5 μM to 100 mM), with a detection limit of 1.7 μM (at a signal-to-noise ratio of 3). The modified GCE is not interfered by species such as uric acid and glucose. Its good stability, high selectivity and good reproducibility make this electrode a valuable tool for inexpensive amperometric sensing of H 2 O 2 .

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Optimization of stabilization conditions for electrospun polyacrylonitrile nanofibers

Cited by 187 publications

References 21 publications

Highly porous N-doped carbons impregnated with sodium for efficient CO₂ capture

Highly porous N-doped carbons impregnated with sodium for efficient CO₂ capture

Functionalization of PAN-Based Electrospun Carbon Nanofibers by Acid Oxidation: Study of Structural,Electrical and Mechanical Properties

Highly sensitive hydrogen peroxide sensor based on a glassy carbon electrode modified with platinum nanoparticles on carbon nanofiber heterostructures

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Optimization of stabilization conditions for electrospun polyacrylonitrile nanofibers

Cited by 187 publications

References 21 publications

Highly porous N-doped carbons impregnated with sodium for efficient CO2 capture

Highly porous N-doped carbons impregnated with sodium for efficient CO2 capture

Functionalization of PAN-Based Electrospun Carbon Nanofibers by Acid Oxidation: Study of Structural,Electrical and Mechanical Properties

Highly sensitive hydrogen peroxide sensor based on a glassy carbon electrode modified with platinum nanoparticles on carbon nanofiber heterostructures

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Highly porous N-doped carbons impregnated with sodium for efficient CO₂ capture

Highly porous N-doped carbons impregnated with sodium for efficient CO₂ capture