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Schalenbach M, Selmert V, Kretzschmar A, Raijmakers L, Durmus YE, Tempel H, Eichel RA. How microstructures, oxide layers, and charge transfer reactions influence double layer capacitances. Part 1: impedance spectroscopy and cyclic voltammetry to estimate electrochemically active surface areas (ECSAs). Phys Chem Chem Phys 2024; 26:14288-14304. [PMID: 38693897 DOI: 10.1039/d3cp04743a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Varying the electrode potential rearranges the charges in the double layer (DL) of an electrochemical interface by a resistive-capacitive current response. The capacitances of such charge relocations are frequently used in the research community to estimate electrochemical active surface areas (ECSAs), yet the reliability of this methodology is insufficiently examined. Here, the relation of capacitances and ECSAs is critically assessed with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) data on polished (Au, Ti, Ru, Pt, Ni, glassy carbon, graphite plate) and porous (carbon fleeces) electrodes. By investigating this variety of electrodes, the frequency-dependencies observed in the measured capacitances are shown to arise from the inherent resistive-capacitive DL response, charge transfer reactions, and resistively damped capacitive currents in microstructures (such as pores, pinholes, or cracks). These frequency-dependencies are typically overlooked when capacitances are related to ECSAs. The capacitance at the specimen-characteristic relaxation frequency of the resistive-capacitive DL response is proposed as a standardized capacitance-metric to estimate ECSAs. In 1 M perchloric acid, the polished gold electrode and the high-surface area carbon fleeces show ratios of capacitance-metric over surface-area of around 3.7 μF cm-2. Resistively damped currents in microstructures and low-conducting oxide layers are shown to complicate trustworthy capacitance-based estimations of ECSAs. In the second part of this study, advanced equivalent circuits models to describe the measured EIS and CV responses are presented.
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Affiliation(s)
- Maximilian Schalenbach
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
| | - Victor Selmert
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
- Institute of Physical Chemistry, RWTH Aachen University, 52062 Aachen, Germany
| | - Ansgar Kretzschmar
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
| | - Luc Raijmakers
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
| | - Yasin Emre Durmus
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
| | - Hermann Tempel
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
| | - Rüdiger-A Eichel
- Fundamental Electrochemistry (IEK-9), Institute of Energy and Climate Research, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany.
- Institute of Physical Chemistry, RWTH Aachen University, 52062 Aachen, Germany
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Conti DM, Urru C, Bruni G, Galinetto P, Albini B, Milanese C, Pisani S, Berbenni V, Capsoni D. Design of Na 3MnZr(PO 4) 3/Carbon Nanofiber Free-Standing Cathodes for Sodium-Ion Batteries with Enhanced Electrochemical Performances through Different Electrospinning Approaches. Molecules 2024; 29:1885. [PMID: 38675705 PMCID: PMC11053439 DOI: 10.3390/molecules29081885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/12/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
The NASICON-structured Na3MnZr(PO4)3 compound is a promising high-voltage cathode material for sodium-ion batteries (SIBs). In this study, an easy and scalable electrospinning approach was used to synthesize self-standing cathodes based on Na3MnZr(PO4)3 loaded into carbon nanofibers (CNFs). Different strategies were applied to load the active material. All the employed characterization techniques (X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), thermal gravimetric analysis (TGA), and Raman spectroscopy) confirmed the successful loading. Compared to an appositely prepared tape-cast electrode, Na3MnZr(PO4)3/CNF self-standing cathodes demonstrated an enhanced specific capacity, especially at high C-rates, thanks to the porous conducive carbon nanofiber matrix. Among the strategies applied to load Na3MnZr(PO4)3 into the CNFs, the electrospinning (vertical setting) of the polymeric solution containing pre-synthesized Na3MnZr(PO4)3 powders resulted effective in obtaining the quantitative loading of the active material and a homogeneous distribution through the sheet thickness. Notably, Na3MnZr(PO4)3 aggregates connected to the CNFs, covered their surface, and were also embedded, as demonstrated by TEM and EDS. Compared to the self-standing cathodes prepared with the horizontal setting or dip-drop coating methods, the vertical binder-free electrode exhibited the highest capacity values of 78.2, 55.7, 38.8, 22.2, 16.2, 12.8, 10.3, 9.0, and 8.5 mAh/g at C-rates of 0.05C, 0.1C, 0.2C, 0.5C, 1C, 2C, 5C, 10C, and 20C, respectively, with complete capacity retention at the end of the measurements. It also exhibited a good cycling life, compared to its tape-cast counterpart: it displayed higher capacity retention at 0.2C and 1C, and, after cycling 1000 cycles at 1C, it could be further cycled at 5C, 10C, and 20C.
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Affiliation(s)
- Debora Maria Conti
- Department of Chemistry, Physical Chemistry Section & C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase), University of Pavia, Via Taramelli 16, 27100 Pavia, Italy; (D.M.C.); (C.U.); (G.B.); (C.M.); (V.B.)
| | - Claudia Urru
- Department of Chemistry, Physical Chemistry Section & C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase), University of Pavia, Via Taramelli 16, 27100 Pavia, Italy; (D.M.C.); (C.U.); (G.B.); (C.M.); (V.B.)
| | - Giovanna Bruni
- Department of Chemistry, Physical Chemistry Section & C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase), University of Pavia, Via Taramelli 16, 27100 Pavia, Italy; (D.M.C.); (C.U.); (G.B.); (C.M.); (V.B.)
| | - Pietro Galinetto
- Department of Physics, University of Pavia, 27100 Pavia, Italy; (P.G.); (B.A.)
| | - Benedetta Albini
- Department of Physics, University of Pavia, 27100 Pavia, Italy; (P.G.); (B.A.)
| | - Chiara Milanese
- Department of Chemistry, Physical Chemistry Section & C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase), University of Pavia, Via Taramelli 16, 27100 Pavia, Italy; (D.M.C.); (C.U.); (G.B.); (C.M.); (V.B.)
| | - Silvia Pisani
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy;
| | - Vittorio Berbenni
- Department of Chemistry, Physical Chemistry Section & C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase), University of Pavia, Via Taramelli 16, 27100 Pavia, Italy; (D.M.C.); (C.U.); (G.B.); (C.M.); (V.B.)
| | - Doretta Capsoni
- Department of Chemistry, Physical Chemistry Section & C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase), University of Pavia, Via Taramelli 16, 27100 Pavia, Italy; (D.M.C.); (C.U.); (G.B.); (C.M.); (V.B.)
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3
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Fischer T, Kretzschmar A, Selmert V, Jovanovic S, Kungl H, Tempel H, Eichel RA. Post-treatment strategies for pyrophoric KOH-activated carbon nanofibres. RSC Adv 2024; 14:3845-3856. [PMID: 38274173 PMCID: PMC10810230 DOI: 10.1039/d3ra07096d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/30/2023] [Indexed: 01/27/2024] Open
Abstract
The effect of two atmospheric post-treatment conditions directly after the KOH activation of polyacrylonitrile-based nanofibres is studied in this work. As post-treatment different N2 : O2 flow conditions, namely high O2-flow and low O2-flow, are applied and their impact on occurring reactions and carbon nanofibres' properties is studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), Raman spectroscopy, elemental analysis and CO2 and Ar gas adsorption. At high O2-flow conditions a pyrophoric effect was observed on the KOH-activated carbon nanofibers. Based on the obtained results from the TGA and DSC the pyrophoric effect is attributed to the oxidation reactions of metallic potassium formed during the KOH activation process and a consequent carbon combustion reaction. Suppression of this pyrophoric effect is achieved using the low O2-flow conditions due to a lower heat formation of the potassium oxidation and the absence of carbon combustion. Compared to the high O2-flow samples no partial destruction of the carbon nanofibers is observed in the SEM images. The determination of the adsorption isotherms, the surface area, the pore size distribution and the isosteric enthalpies of adsorption show the superior properties under low O2-flow conditions. The present micropore volume is increased from 0.424 cm3 g-1 at high O2-flow to 0.806 cm3 g-1 for low O2-flow samples, resulting in an increase of CO2 adsorption capacity of 38% up to 6.6 mmol g-1 at 1 bar. This significant improvement clearly points out the importance of considering highly exothermic potassium oxidation reactions and possible post-treatment strategies when applying KOH activation to electrospun carbon nanofiber materials.
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Affiliation(s)
- Tom Fischer
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
- RWTH Aachen University, Institute of Physical Chemistry Aachen 52056 Germany
| | - Ansgar Kretzschmar
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
| | - Victor Selmert
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
- RWTH Aachen University, Institute of Physical Chemistry Aachen 52056 Germany
| | - Sven Jovanovic
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
| | - Hans Kungl
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
| | - Hermann Tempel
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
| | - Rüdiger-A Eichel
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-9) - Fundamental Electrochemistry Jülich 52425 Germany
- RWTH Aachen University, Institute of Physical Chemistry Aachen 52056 Germany
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4
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Abbas Z, Hussain N, Kumar S, Mobin SM. In situ growth of a redox-active metal-organic framework on electrospun carbon nanofibers as a free-standing electrode for flexible energy storage devices. NANOSCALE 2024; 16:868-878. [PMID: 38099850 DOI: 10.1039/d3nr04984a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The rational construction of free-standing and flexible electrodes for application in electrochemical energy storage devices and next-generation supercapacitors is an emerging research focus. Herein, we prepared a redox-active ferrocene dicarboxylic acid (Fc)-based nickel metal-organic framework (MOF) on electrospun carbon nanofibers (NiFc-MOF@CNFs) via an in situ approach. This in situ approach avoided the aggregation of the MOF. The NiFc-MOF@CNF flexible electrode showed a high redox-active behavior owing to the presence of ferrocene and flexible carbon nanofibers, which led to unique properties, including high flexibility and lightweight. Furthermore, the prepared electrode was utilized in a supercapacitors (SC) without the use of any binder, which achieved a specific capacity of 460 C g-1 at 1 A g-1 with an excellent cyclic retention of 82.2% after 25 000 cycles and a good rate capability. A flexible asymmetric supercapacitor device was assembled, which delivered a high energy density of 56.25 W h kg-1 and a long-lasting cycling performance. Also, the prepared electrode could be used as a freestanding electrode in flexible devices at different bending angles. The obtained cyclic voltammetry curves showed negligible changes, indicating the high stability and good flexibility of the electrode. Thus, the use of the in situ strategy can lead to the uniform growth of redox-active MOFs or other porous materials on CNFs.
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Affiliation(s)
- Zahir Abbas
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Simrol, Khandwa Road, Indore 453552, India.
| | - Nissar Hussain
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Simrol, Khandwa Road, Indore 453552, India.
| | - Surender Kumar
- CSIR-Advanced Materials and Processes Research Institute (CSIR-AMPRI), Hoshangabad Road, Near Habibganj Naka, Bhopal - 462026, India
| | - Shaikh M Mobin
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Simrol, Khandwa Road, Indore 453552, India.
- Centre for Advanced Electronics (CAE), Indian Institute of Technology (IIT) Indore, Simrol, Khandwa Road, Indore 453552, India
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5
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Shao Z, Shen R, Gui Z, Xie J, Jiang J, Wang X, Li W, Guo S, Liu Y, Zheng G. Ethyl cellulose/gelatin/β-cyclodextrin/curcumin nanofibrous membrane with antibacterial and formaldehyde adsorbable capabilities for lightweight and high-performance air filtration. Int J Biol Macromol 2024; 254:127862. [PMID: 37939775 DOI: 10.1016/j.ijbiomac.2023.127862] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/17/2023] [Accepted: 11/01/2023] [Indexed: 11/10/2023]
Abstract
Functionalization of bio-based nanofibers is the development tendency of high-performance air filter. However, the conventional structural optimization strategy based on high solution conductivity greatly hinders the development of fully bio-based air filter, and not conducive to sustainable development. This work fabricated fully bio-based nanofibrous membrane with formaldehyde-adsorbable and antibacterial capabilities by electrospinning low-conductivity solution for high-performance air filtration and applied to lightweight mask. The "water-like" ethyl cellulose (EC) was selected as the base polymer to "nourish" functional materials of gelatin (GE), β-cyclodextrin (βCD), and curcumin (Cur), thus forming a solution system with high binding energy differences and electrospinning into ultrafine bimodal nanofibers. The filtration efficiency for 0.3 μm NaCl particles, pressure drop, and quality factor were 99.25 %, 53 Pa, and 0.092 Pa-1, respectively; the bacteriostatic rates against Escherichia coli and Staphylococcus aureus were 99.9 % and 99.4 %, respectively; the formaldehyde adsorption capacity was 442 μg/g. This is the first report on antibacterial and formaldehyde-adsorbable high-performance air filter entirely made from bio-based materials. This simple strategy will greatly broaden the selection of materials for preparing high-performance multifunctional air filter, and promote the development of bio-based air filter.
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Affiliation(s)
- Zungui Shao
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
| | - Ruimin Shen
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
| | - Zeqian Gui
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
| | - Junjie Xie
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
| | - Jiaxin Jiang
- School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen 361024, China
| | - Xiang Wang
- School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen 361024, China
| | - Wenwang Li
- School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen 361024, China
| | - Shumin Guo
- School of Mathematical Sciences, Xiamen University, Xiamen 361102, China
| | - Yifang Liu
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
| | - Gaofeng Zheng
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China.
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Ma X, Du Y, Fu C, Fang H, Wei H, Pan Z, Sang S, Zhang J. Effects of Supercritical CO 2 on the Pore Structure Complexity of High-Rank Coal with Water Participation and the Implications for CO 2 ECBM. ACS OMEGA 2023; 8:18964-18980. [PMID: 37273609 PMCID: PMC10233688 DOI: 10.1021/acsomega.3c01486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 05/10/2023] [Indexed: 06/06/2023]
Abstract
To reveal how mineral changes affect a coal pore structure in the presence of water, an autoclave was used to carry out the supercritical CO2 (ScCO2)-H2O-coal interaction process. To reveal the changes in pore complexity, mercury intrusion capillary pressure (MICP), low-pressure nitrogen adsorption, CO2 adsorption, and field emission scanning electron microscopy (FESEM) experiments were combined with fractal theory. The experimental data of MICP show that the MICP data are meaningful only for the pore fractal dimension with pore sizes >150 nm. Therefore, the pores were classified into the classes >150, 2-150, and <2 nm. The results show that the pore volume and specific surface area of the coal increased significantly after the reaction. ScCO2-H2O can cause the formation of many new pores and fractures in the coal. The presence of H2O may increase the potential for the injection of CO2 into the coal seam. The complete dissolution of calcite surfaces caused a significant increase in the pore volume and specific surface area of the pores >150 nm. The morphologies of these pores are controlled by the morphologies of the complete dissolution carbonate particles. The pore morphologies were relatively uniform, and the fractal dimensions decreased. However, the incomplete dissolution of calcite leads to irregular variations in the morphologies for the pores in the 2-150 nm pore size range. The pore morphologies that are produced by incompletely dissolved calcite particles are more complex, which increases the fractal dimensions after the reaction. The fractal dimensions of the pores <2 nm decreased after the reaction, indicating that the newly generated micropores were more uniform and had regular pore morphologies.
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Affiliation(s)
- Xicong Ma
- National
and Local Joint Engineering Research Center for Carbon Capture Utilization
and Sequestration & State Key Laboratory of Continental Dynamics,
Department of Geology, Northwest University, Xi’an 710069, China
| | - Yi Du
- National
and Local Joint Engineering Research Center for Carbon Capture Utilization
and Sequestration & State Key Laboratory of Continental Dynamics,
Department of Geology, Northwest University, Xi’an 710069, China
- State
Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
| | - Changqing Fu
- College
of Geology and Environment, Xi’an
University of Science & Technology, Xi’an 710054, China
| | - Huihuang Fang
- School
of Earth and Environment, Anhui University
of Science and Technology, Huainan, Anhui 232001, China
| | - Haonan Wei
- National
and Local Joint Engineering Research Center for Carbon Capture Utilization
and Sequestration & State Key Laboratory of Continental Dynamics,
Department of Geology, Northwest University, Xi’an 710069, China
| | - Zhejun Pan
- Key
Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient
Development, Ministry of Education, Northeast
Petroleum University, Daqing 163318, China
| | - Shuxun Sang
- Jiangsu
Key
Laboratory of Coal-based Greenhouse Gas Control and Utilization, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China
| | - Junying Zhang
- State
Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
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Abd El-Aziz AM, Serag E, Kenawy MY, El-Maghraby A, Kandil SH. Hydrothermally reinforcing hydroxyaptatite and bioactive glass on carbon nanofiber scafold for bone tissue engineering. Front Bioeng Biotechnol 2023; 11:1170097. [PMID: 37292092 PMCID: PMC10245555 DOI: 10.3389/fbioe.2023.1170097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/09/2023] [Indexed: 06/10/2023] Open
Abstract
As a bone tissue engineering scaffold, the objective of this study was to design hierarchical bioceramics based on an electrospun composite of carbon nanofibers (CNF) reinforced with hydroxyapatite (HA) and bioactive glasses (BGs) nanoparticles. The performance of the nanofiber as a scaffold for bone tissue engineering was enhanced by reinforcing it with hydroxyapatite and bioactive glass nanoparticles through a hydrothermal process. The influence of HA and BGs on the morphology and biological properties of carbon nanofibers was examined. The prepared materials were evaluated for cytotoxicity in vitro using the water-soluble tetrazolium salt assay (WST-assay) on Osteoblast-like (MG-63) cells, and oste-ocalcin (OCN), alkaline phosphatase (ALP) activity, total calcium, total protein, and tar-trate-resistant acid phosphatase (TRAcP) were measured. The WST-1, OCN, TRAcP, total calcium, total protein, and ALP activity tests demonstrated that scaffolds reinforced with HA and BGs had excellent in vitro biocompatibility (cell viability and proliferation) and were suitable for repairing damaged bone by stimulating bioactivity and biomarkers of bone cell formation.
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Affiliation(s)
- Asmaa M. Abd El-Aziz
- Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria, Egypt
| | - Eman Serag
- Marine Pollution Department, Environmental Division, National Institute of Oceanography and Fisheries, Alexandria, Egypt
| | - Marwa Y. Kenawy
- Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria, Egypt
| | - Azza El-Maghraby
- Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria, Egypt
| | - Sherif H. Kandil
- Department of Materials Science, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
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8
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Wu Y, Song Y, Wu D, Mao X, Yang X, Jiang S, Zhang C, Guo R. Recent Progress in Modifications, Properties, and Practical Applications of Glass Fiber. Molecules 2023; 28:molecules28062466. [PMID: 36985440 PMCID: PMC10053231 DOI: 10.3390/molecules28062466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/05/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023] Open
Abstract
As a new member of the silica-derivative family, modified glass fiber (MGF) has attracted extensive attention because of its excellent properties and potential applications. Surface modification of glass fiber (GF) greatly changes its performance, resulting in a series of changes to its surface structure, wettability, electrical properties, mechanical properties, and stability. This article summarizes the latest research progress in MGF, including the different modification methods, the various properties, and their advanced applications in different fields. Finally, the challenges and possible solutions were provided for future investigations of MGF.
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Affiliation(s)
- Yawen Wu
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China; (Y.W.); (Y.S.); (D.W.); (X.M.)
| | - Yangyang Song
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China; (Y.W.); (Y.S.); (D.W.); (X.M.)
| | - Di Wu
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China; (Y.W.); (Y.S.); (D.W.); (X.M.)
| | - Xiaowei Mao
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China; (Y.W.); (Y.S.); (D.W.); (X.M.)
| | - Xiuling Yang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
| | - Shaohua Jiang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
- Correspondence: (S.J.); (R.G.); Tel.: +86-25-85428090 (S.J.); +86-27-84238886 (R.G.)
| | - Chunmei Zhang
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Rui Guo
- Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China; (Y.W.); (Y.S.); (D.W.); (X.M.)
- Correspondence: (S.J.); (R.G.); Tel.: +86-25-85428090 (S.J.); +86-27-84238886 (R.G.)
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9
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Construction of a dual-cage-based MOF with uncoordinated nitrogen sites for CO2 adsorption and fixation. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Liu Z, Zheng W, Li Z, Dai Y, Jiang X, Zhang X, Ruan X, Wu X, He G. Constructing a CO 2-Philic and Highly Permeative Transmission Pathway in Electrospun Fiber Composite Membranes by Introduction of Ether-Oxygen Groups. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhen Liu
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Wenji Zheng
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
- Panjin Institute of Industrial Technology, Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Dalian University of Technology, Panjin 124221, China
| | - Ziheng Li
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
| | - Yan Dai
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- Panjin Institute of Industrial Technology, Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Dalian University of Technology, Panjin 124221, China
| | - Xiaobin Jiang
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
| | - Xiujuan Zhang
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xuehua Ruan
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xuemei Wu
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Gaohong He
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116023, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
- Panjin Institute of Industrial Technology, Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Dalian University of Technology, Panjin 124221, China
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11
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Selmert V, Kretzschmar A, Weinrich H, Tempel H, Kungl H, Eichel R. CO 2 /N 2 Separation on Highly Selective Carbon Nanofibers Investigated by Dynamic Gas Adsorption. CHEMSUSCHEM 2022; 15:e202200761. [PMID: 35499149 PMCID: PMC9401035 DOI: 10.1002/cssc.202200761] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Indexed: 06/14/2023]
Abstract
The development of highly selective adsorbents for CO2 is a key part to advance separation by adsorption as a viable technique for CO2 capture. In this work, polyacrylonitrile (PAN) based carbon nanofibers (CNFs) were investigated for their CO2 separation capabilities using dynamic gas adsorption. The CNFs were prepared by electrospinning and subsequent carbonization at various temperatures ranging from 600 to 1000 °C. A thorough investigation of the CO2 /N2 selectivity resulted in measured values of 53-106 at 1 bar and 25 °C on CNFs carbonized at 600, 700, or 800 °C. Moreover, the selectivity increased with lower measurement temperatures and lower CO2 partial pressures, reaching values up to 194. Further analysis revealed high long-term stability with no degradation over 300 cycles and fast adsorption kinetics for CNFs carbonized at 600 or 700 °C. These excellent properties make PAN-based CNFs carbonized at 600 or 700 °C promising candidates for the capture of CO2 .
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Affiliation(s)
- Victor Selmert
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
- Institute of Physical ChemistryRWTH Aachen University52056AachenGermany
| | - Ansgar Kretzschmar
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
- Institute of Physical ChemistryRWTH Aachen University52056AachenGermany
| | - Henning Weinrich
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
| | - Hermann Tempel
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
| | - Hans Kungl
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
| | - Rüdiger‐A. Eichel
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH52425JülichGermany
- Institute of Physical ChemistryRWTH Aachen University52056AachenGermany
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12
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The Nanofibrous CaO Sorbent for CO2 Capture. NANOMATERIALS 2022; 12:nano12101677. [PMID: 35630899 PMCID: PMC9146495 DOI: 10.3390/nano12101677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/08/2022] [Accepted: 05/12/2022] [Indexed: 12/10/2022]
Abstract
The nanofibrous CaO sorbent for high-temperature CO2 capture was fabricated by the calcination of electrospun composite filaments containing calcium acetylacetonate and polyacrylonitrile as a calcium-oxide precursor and a binder polymer, respectively. The calcination was carried out in air to prevent PAN carbonization and to obtain pure CaO nanofibers. The resulting mats of CaO nanofibers with the average diameter of 130 nm were characterized by a specific surface area of 31 m2/g, a CO2-uptake capacity of 16.4 mmol/g at the carbonation temperature of 618 °C, a hardness of 1.87 MPa, and the indentation Young’s modulus of 786 MPa. The low decarbonation temperature makes the fabricated sorbent promising, for example, for the calcium-looping technology of CO2 removal from the hot exhaust gases of fossil-fueled power plants.
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13
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Lei L, Cheng Y, Chen C, Kosari M, Jiang Z, He C. Taming structure and modulating carbon dioxide (CO 2) adsorption isosteric heat of nickel-based metal organic framework (MOF-74(Ni)) for remarkable CO 2 capture. J Colloid Interface Sci 2022; 612:132-145. [PMID: 34992014 DOI: 10.1016/j.jcis.2021.12.163] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/07/2021] [Accepted: 12/24/2021] [Indexed: 11/15/2022]
Abstract
Though the highest CO2 capture capacity belongs to liquid amine-solutions, solid matters capable of CO2 capture are also highly sought, providing that, they offer at least analogous CO2 adsorption capacity and CO2/N2 selectivity. Herein, a surprisingly high-performance Ni-based metal-organic framework for CO2 adsorption, namely MOF-74(Ni), was synthesized by a facile condensation reflux approach. It was found that the structure and CO2 adsorption isosteric heat of MOF-74(Ni) could tune upon varying the synthesis duration under various temperatures. The optimized MOF-74(Ni)-24-140 (synthesized at 140 °C for 24 h) displays outstanding CO2 adsorption capacity of 8.29/6.61 mmol/g at 273/298 K under normal pressure of 1.0 bar, several times higher than previously reported MOF-74-Ni (2.0/2.1 times), UTSA-16 (1.5/1.6 times), and DA-CMP-1 (3.6/4.9 times) under similar conditions. The excellent CO2 capture capacity is associated to the abundant adsorption sites (mainly arising from the cationic Ni2+ ions) and narrow micropore channels (mainly arising from the cage structure of Ni2+ ions coordinated with organic linkers). Offering a high CO2 selectivity (CO2/N2 = 49) and a well-tuned isosteric heat of CO2 adsorption (27-52 kJ/mol) besides its decent CO2 capture capacity, MOF-74(Ni) strongly stands out as an efficient and strong CO2 capturing material with industrial scale applicability.
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Affiliation(s)
- Lei Lei
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, Shaanxi, PR China
| | - Yan Cheng
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, Shaanxi, PR China; State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710048, Shaanxi, PR China
| | - Changwei Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710048, Shaanxi, PR China; Department of Chemical and Biomolecular Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
| | - Mohammadreza Kosari
- Department of Chemical and Biomolecular Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
| | - Zeyu Jiang
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710048, Shaanxi, PR China.
| | - Chi He
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710048, Shaanxi, PR China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China.
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14
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Manufacture of Carbon Materials with High Nitrogen Content. MATERIALS 2022; 15:ma15072415. [PMID: 35407747 PMCID: PMC8999754 DOI: 10.3390/ma15072415] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 02/04/2023]
Abstract
Nowadays one of the biggest challenges for carbon materials is their use in CO2 capture and their use as electrocatalysts in the oxygen reduction reaction (ORR). In both cases, it is necessary to dope the carbon with nitrogen species. Conventional methods to prepare nitrogen doped carbons such as melamine carbonization or NH3 treatment generate nitrogen doped carbons with insufficient nitrogen content. In the present research, a series of activated carbons derived from MOFs (ZIF-8, ZIF-67) are presented. Activated carbons have been prepared in a single step, by pyrolysis of the MOF in an inert atmosphere, between 600 and 1000 °C. The carbons have a nitrogen content up to 20 at.% and a surface area up to 1000 m2/g. The presence of this nitrogen as pyridine or pyrrolic groups, and as quaternary nitrogen are responsible for the great adsorption capacity of CO2, especially the first two. The presence of Zn and Co generates very different carbonaceous structures. Zn generates a greater porosity development, which makes the doped carbons ideal for CO2 capture. Co generates more graphitized doped carbons, which make them suitable for their use in electrochemistry.
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15
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Zheng W, Liu Z, Ding R, Dai Y, Li X, Ruan X, He G. Constructing continuous and fast transport pathway by highly permeable polymer electrospun fibers in composite membrane to improve CO2 capture. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120332] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Effect of Thermal Stabilization on PAN-Derived Electrospun Carbon Nanofibers for CO 2 Capture. Polymers (Basel) 2021; 13:polym13234197. [PMID: 34883700 PMCID: PMC8659445 DOI: 10.3390/polym13234197] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/21/2021] [Accepted: 11/26/2021] [Indexed: 12/23/2022] Open
Abstract
Carbon capture is amongst the key emerging technologies for the mitigation of greenhouse gases (GHG) pollution. Several materials as adsorbents for CO2 and other gases are being developed, which often involve using complex and expensive fabrication techniques. In this work, we suggest a sound, easy and cheap route for the production of nitrogen-doped carbon materials for CO2 capture by pyrolysis of electrospun poly(acrylonitrile) (PAN) fibers. PAN fibers are generally processed following specific heat treatments involving up to three steps (to get complete graphitization), one of these being stabilization, during which PAN fibers are oxidized and stretched in the 200–300 °C temperature range. The effect of stabilization temperature on the chemical structure of the carbon nanofibers is investigated herein to ascertain the possible implication of incomplete conversion/condensation of nitrile groups to form pyridine moieties on the CO2 adsorption capacity. The materials were tested in the pure CO2 atmosphere at 20 °C achieving 18.3% of maximum weight increase (equivalent to an uptake of 4.16 mmol g−1), proving the effectiveness of a high stabilization temperature as route for the improvement of CO2 uptake.
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Park J, Kretzschmar A, Selmert V, Camara O, Kungl H, Tempel H, Basak S, Eichel RA. Structural Study of Polyacrylonitrile-Based Carbon Nanofibers for Understanding Gas Adsorption. ACS APPLIED MATERIALS & INTERFACES 2021; 13:46665-46670. [PMID: 34546700 DOI: 10.1021/acsami.1c13541] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Polyacrylonitrile-based carbon nanofibers (PAN-based CNFs) have great potential to be used for carbon dioxide (CO2) capture due to their excellent CO2 adsorption properties. The porous structure of PAN-based CNFs originates from their turbostratic structure, which is composed of numerous disordered stacks of graphitic layers. During the carbonization process, the internal structure is arranged toward the ordered graphitic structure, which significantly influences the gas adsorption properties of PAN-based CNFs. However, the relation between structural transformation and CO2 capture is still not clear enough to tune the PAN-based CNFs. In this paper, we show that, with increasing carbonization temperature, the arrangement of the PAN-based CNF's structure along the stack and lateral directions takes place independently: gradually aligning and merging along the stack direction and enlarging along the lateral direction. Further, we correlate the structural arrangement and the CO2 adsorption properties of the PAN-based CNFs to propose a comprehensive structural mechanism. This mechanism provides the knowledge to understand and tailor the gas adsorption properties of PAN-based CNFs.
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Affiliation(s)
- Junbeom Park
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Ansgar Kretzschmar
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Institute of Physical Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Victor Selmert
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Institute of Physical Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Osmane Camara
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Hans Kungl
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Hermann Tempel
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Shibabrata Basak
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Rüdiger A Eichel
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Institute of Physical Chemistry, RWTH Aachen University, 52074 Aachen, Germany
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18
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Suhdi S, Wang SC. The Production of Carbon Nanofiber on Rubber Fruit Shell-Derived Activated Carbon by Chemical Activation and Hydrothermal Process with Low Temperature. NANOMATERIALS 2021; 11:nano11082038. [PMID: 34443869 PMCID: PMC8399015 DOI: 10.3390/nano11082038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/31/2021] [Accepted: 08/09/2021] [Indexed: 02/06/2023]
Abstract
Recently, the conversion of biomass into carbon nanofibers has been extensively studied. In this study, carbon nanofibers (CNFs) were prepared from rubber fruit shell (RFS) by chemical activation with H3PO4, followed by a simple hydrothermal process at low temperature and without a vacuum and gas catalyst. XRD and Raman studies show that the structure formed is an amorphous graphite formation. From the thermal analysis, it is shown that CNFs have a high thermal stability. Furthermore, an SEM/TEM analysis showed that CNFs’ morphology varied in size and thickness. The obtained results reveal that by converting RFS into an amorphous carbon through chemical activation and hydrothermal processes, RFS is considered a potential biomass source material to produce carbon nanofibers.
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19
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Kretzschmar A, Selmert V, Weinrich H, Kungl H, Tempel H, Eichel R. Study of CO
2
Sorption Kinetics on Electrospun Polyacrylonitrile‐Based Carbon Nanofibers. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202000463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ansgar Kretzschmar
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9) 52425 Jülich Germany
- RWTH Aachen University Institute of Physical Chemistry 52056 Aachen Germany
| | - Victor Selmert
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9) 52425 Jülich Germany
- RWTH Aachen University Institute of Physical Chemistry 52056 Aachen Germany
| | - Henning Weinrich
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9) 52425 Jülich Germany
| | - Hans Kungl
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9) 52425 Jülich Germany
| | - Hermann Tempel
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9) 52425 Jülich Germany
| | - Rüdiger‐A. Eichel
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9) 52425 Jülich Germany
- RWTH Aachen University Institute of Physical Chemistry 52056 Aachen Germany
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20
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Kirbiyikkurukavak Ç, Büyükbekar BZ, Ersöz M. PAN-based activated carbon nanofiber/metal oxide composites for CO 2 and CH 4 adsorption: influence of metal oxide. Turk J Chem 2021; 45:914-926. [PMID: 34385876 PMCID: PMC8326473 DOI: 10.3906/kim-2012-37] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 04/05/2021] [Indexed: 11/21/2022] Open
Abstract
In the present study, we successfully prepared two different electrospun polyacrylonitrile (PAN) based-activated carbon nanofiber (ACNF) composites by incorporation of well-distributed Fe2O3 and Co3O4 nanoparticles (NPs). The influence of metal oxide on the structural, morphological, and textural properties of final composites was thoroughly investigated. The results showed that the morphological and textural properties could be easily tuned by changing the metal oxide NPs. Even though, the ACNF composites were not chemically activated by any activation agent, they presented relatively high surface areas (SBET) calculated by Brunauer–Emmett–Teller (BET) equation as 212.21 and 185.12 m2/g for ACNF/Fe2O3 and ACNF/Co3O4 composites, respectively. Furthermore, the ACNF composites were utilized as candidate adsorbents for CO2 and CH4 adsorption. The ACNF/Fe2O3 and ACNF/Co3O4 composites resulted the highest CO2 adsorption capacities of 1.502 and 2.166 mmol/g at 0 °C, respectively, whereas the highest CH4 adsorption capacities were obtained to be 0.516 and 0.661 mmol/g at 0 °C by ACNF/Fe2O3 and ACNF/Co3O4 composites, respectively. The isosteric heats calculated lower than 80 kJ/mol showed that the adsorption processes of CO2 and CH4 were mainly dominated by physical adsorption for both ACNF composites. Our findings indicated that ACNF-metal oxide composites are useful materials for designing of CO2 and CH4 adsorption systems.
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21
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Yadav D, Amini F, Ehrmann A. Recent advances in carbon nanofibers and their applications – A review. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109963] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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