Preparation and Characterization of Carbon Nanofibers from the High Temperature Controllable Flame

2014 ◽  
Vol 1033-1034 ◽  
pp. 1086-1089
Author(s):  
Yuan Chao Liu ◽  
Li Zhi Wu ◽  
Jing Hao Ren
Keyword(s):  
Electron Microscope ◽  
High Temperature ◽  
Carbon Source ◽  
Carbon Nanofibers ◽  
Carbon Nanofiber ◽  
Synthesis Methods ◽  
Source Characterization ◽  
Experimental Apparatus ◽  
Flame Burner

Carbon nanofiber is a new type of carbon materials and it has wide application prospects. At present, there are many kinds of synthesis methods of carbon nanofibers. Among them, preparation of carbon nanofibers from the controllable flame is a new method. It needs simple laboratory equipments and normal atmosphere pressure in this method. Experimental apparatus is including controllable flame burner, thermocouple, mass flow meter and catalyst preparation system, etc. The key factors of synthesis experiment involving the carbon source, the catalyst and high temperature heat source. Characterization of the carbon nanofibers from the controllable flame is by scanning electron microscope (SEM) and transmission electron microscope (TEM).The experimental results indicated that carbon nanofibers with less impurity can be captured at the temperature from 720 to 880 ̊C when carbon monoxide and iron-based catalyst served as carbon source and the catalyst respectively.

Experimental Characterization of Carbon Nanotubes on the Stainless Steel Substrate from the Controllable Flame

2014 ◽  
Vol 638-640 ◽  
pp. 1441-1444
Author(s):  
Yuan Chao Liu ◽  
Jun Tie Che ◽  
Jing Hao Ren
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Electron Microscope ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Transmission Electron ◽  
Experimental Apparatus ◽  
Flame Burner ◽  
Temperature Measuring Instrument

Preparation of carbon nanotubes from the controllable flame is a kind of new method. Experimental apparatus is including controllable flame burner, temperature measuring instrument, mass flow meter and catalyst preparation system, etc. The sampling substrate is the growth platform of carbon nanotubes in the flame. The type316 stainless steel is selected as sampling substrate in the experiment. Carbon monoxide provides carbon source and hydrogen/helium premixed gas acts as protection gas. Characterization of the carbon nanotubes on the stainless steel substrate from the controllable flame is by scanning electron microscope (SEM) and transmission electron microscope (TEM). It was found in the experimental that the iron-based catalyst particles are mainly distributed in the ends of the carbon nanotubes. The experimental results reveal that the growth of carbon nanotubes will be very exuberant if the sampling time is controlled within ten minutes.

Preparation of Carbon Nanofibers from Polyacrylonitrile Nanofibers by Electrospinning

2011 ◽  
Vol 415-417 ◽  
pp. 642-647
Author(s):  
En Zhong Li ◽  
Da Xiang Yang ◽  
Wei Ling Guo ◽  
Hai Dou Wang ◽  
Bin Shi Xu
Keyword(s):  
Electron Microscope ◽  
Carbon Nanofibers ◽  
Photoelectron Spectroscopy ◽  
Solution Concentration ◽  
Dimethyl Formamide ◽  
Ultrafine Fibers ◽  
X Ray ◽  
Scanning Electron ◽  
Pan Fibers

Ultrafine fibers were electrospun from polyacrylonitrile (PAN)/N,N-dimethyl formamide (DMF) solution as a precursor of carbon nanofibers. The effects of solution concentration, applied voltage and flow rate on preparation and morphologies of electrospun PAN fibers were investigated. Morphologies of the green fibers, stabilized fibers and carbonized fibers were compared by scanning electron microscope (SEM). The diameter of PAN nanofibers is about 450nm and the distribution of diameter is well-proportioned. Characterization of the elements changes of fibers were performed by X-ray photoelectron spectroscopy (XPS).

scholarly journals Fabrication and Characterization of High Temperature Resin/Carbon Nanofiber Composites

2006 ◽  
Vol 18 (4) ◽  
pp. 527-544 ◽  
Author(s):  
Sayata Ghose ◽  
Kent A. Watson ◽  
Dennis C. Working ◽  
Emilie J. Siochi ◽  
John W. Connell ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Nanofiber ◽  
Fabrication And Characterization

scholarly journals Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
Jihua Gou ◽  
Scott O'Braint ◽  
Haichang Gu ◽  
Gangbing Song
Keyword(s):  
Carbon Nanofibers ◽  
Composite Laminates ◽  
Carbon Nanofiber ◽  
Glass Fibers ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Glass Fiber Reinforced ◽  
Short Glass ◽  
Vartm Process

Vacuum-assisted resin transfer molding (VARTM) process was used to fabricate the nanocomposites through integrating carbon nanofiber paper into traditional glass fiber reinforced composites. The carbon nanofiber paper had a porous structure with highly entangled carbon nanofibers and short glass fibers. In this study, the carbon nanofiber paper was employed as an interlayer and surface layer of composite laminates to enhance the damping properties. Experiments conducted using the nanocomposite beam indicated up to 200–700% increase of the damping ratios at higher frequencies. The scanning electron microscopy (SEM) characterization of the carbon nanofiber paper and the nanocomposites was also conducted to investigate the impregnation of carbon nanofiber paper by the resin during the VARTM process and the mechanics of damping augmentation. The study showed a complete penetration of the resin through the carbon nanofiber paper. The connectivities between carbon nanofibers and short glass fibers within the carbon nanofiber paper were responsible for the significant energy dissipation in the nanocomposites during the damping tests.

Partial black porcelain using wood charcoal as carbon source: characterization of porcelain body part

2021 ◽  
pp. 131095
Author(s):  
Nithiwach Nawaukkaratharnant ◽  
Pim Sudhikam ◽  
Sirithan Jiemsirilers ◽  
Thanakorn Wasanapiarnpong
Keyword(s):  
Carbon Source ◽  
Body Part ◽  
Porcelain Body ◽  
Wood Charcoal ◽  
Source Characterization

Carbon Nanofibers Preparation Using Carbon Monoxide from the V-Type Pyrolysis Flame

2011 ◽  
Vol 688 ◽  
pp. 6-10
Author(s):  
Yuan Chao Liu ◽  
Bao Min Sun
Keyword(s):  
Carbon Monoxide ◽  
Electron Microscope ◽  
Carbon Nanofibers ◽  
Equivalence Ratio ◽  
Carbon Nanofiber ◽  
Premixed Flame ◽  
Transmission Electron ◽  
Sampling Probe ◽  
Flame Method ◽  
Scanning Electron

Synthesis carbon nanofibers from V-type pyrolysis flame use simple carbon monoxide and acetylene /air premixed flame. Catalyst is transported by helium into the burner. The carbon nanofibers from the sampling probe were characterized by scanning electron microscope and transmission electron microscope. The influence of the fuel equivalence ratio and the flow of carbon monoxide were discussed in detail to reveal the formation rule of carbon nanofiber from the pyrolysis flame. The results indicate that carbon monoxide is a good carbon source gas for the preparation of carbon nanofibers. Under appropriate temperature and optimized flow of carbon monoxide, carbon nanofibers with good quality can be prepared from the V-type pyrolysis flame. It can be concluded that this flame method is effective for the preparation of carbon nanofibers.

scholarly journals Exploring the friction and wear behaviors of Ag-Mo hybrid modified thermosetting polyimide composites at high temperature

Friction ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 893-904 ◽  
Author(s):  
Chunjian Duan ◽  
Ren He ◽  
Song Li ◽  
Mingchao Shao ◽  
Rui Yang ◽  
...  
Keyword(s):  
Electron Microscope ◽  
High Temperature ◽  
High Performance ◽  
Friction And Wear ◽  
Bulk Temperature ◽  
Transmission Electron ◽  
Different Temperatures ◽  
New Type ◽  
Polyimide Composites

AbstractPolyimide composites have been extensively used as motion components under extreme conditions for their thermal stability and special self-lubricating performance. In the present study, Ag-Mo hybrids as lubricant fillers were incorporated into thermosetting polyimide to prepare a new type of tribo-materials (TPI-1) at high temperature. Comprehensive investigations at different temperatures reveal that the newly developed TPI-1 exhibits a better reduction in friction and wear rate below 100 °C, but all of them increase significantly when the bulk temperature exceeds 250 °C. The wear mechanisms demonstrated that sandwich-like tribofilms with different layers were established at different temperatures, which was further verified by characterization of scanning electron microscope (SEM), Raman spectroscopy, and transmission electron microscope (TEM). Considering the high-performance TPI coupled with Ag-Mo hybrids, we anticipate that further exploration would provide guidance for designing TPI tribo-materials that would be used at high temperatures.

Carbon Nanofibers from Pyrolysis Flame and Research on the Affecting Factors

2009 ◽  
Vol 87-88 ◽  
pp. 98-103
Author(s):  
Yuan Chao Liu ◽  
Bao Min Sun ◽  
Ti Kun Shan ◽  
Zhao Yong Ding
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
Carbon Nanofibers ◽  
Experimental System ◽  
Average Diameter ◽  
Sampling Time ◽  
Catalyst Precursor ◽  
Affecting Factors ◽  
Flame Burner

Synthesis of carbon nanofibers from the V-type pyrolysis flame is a new method and it has wide application prospects. It needs simple laboratory equipments and normal atmosphere pressure. The V-type pyrolysis flame experimental system is introduced, involving V-type pyrolysis flame burner, mass flux controllers, sampling substrate etc. The carbon nanofibers were characterized by scanning electron microscope and transmission electron microscope. Carbon nanofibers with less impurities and high quality can be captured when the temperature was from 800 to 880°C, austenitic stainless steel type304 was served as sampling substrate, nickel nitrate was served as catalyst precursor and sampling time was 5 minutes. The carbon nanofibers are from 100 to 200 nm in diameter and dozens microns in length. The average diameter of catalyst particles is approximately from 20 to 50 nm. The effects of temperature, sampling substrate materials, sampling time and catalyst were analyzed. The temperature determined the diameter and shape of carbon nanofibers. The austenitic stainless steel type304 substrate containing nickel is in favor of synthesis of carbon nanofibers. The number of carbon nanofibers got more and more while the diameter got thicker firstly and then had little change with the sampling time increased within 5 minutes. In addition, experimental results also indicated that carbon nanofibers had much impurity and worse morphology if the diameter of catalyst particles was above 50nm.

scholarly journals Preparation and Characterization of Carbon Nanofiber from Liquid Phase Carbon Source

2008 ◽  
Vol 18 (10) ◽  
pp. 564-570 ◽  
Author(s):  
Won-Woo Lee ◽  
Chae-Ho Shin ◽  
Han-Sung Park ◽  
Young-Min Choi ◽  
Beyong-Hwan Ryu
Keyword(s):  
Liquid Phase ◽  
Carbon Source ◽  
Carbon Nanofiber

scholarly journals Preparation and Characterization of Multi-doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

2022 ◽  
Author(s):  
Tao Wang ◽  
Oluwafunmilola Ola ◽  
Qijian Niu ◽  
Yuhao Lu ◽  
Malcom Frimpong Dapaah ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Carbon Nanofibers ◽  
Porous Carbon ◽  
Carbon Nanofiber ◽  
Linear Sweep Voltammetry ◽  
Morphological Properties ◽  
Electrospun Nanofiber ◽  
Research Attention ◽  
Porous Carbon Nanofiber

Recently, electrocatalysts for oxygen reduction reactions (ORRs) as well as oxygen evolution reactions (OERs) hinged on electrospun nanofiber composites have attracted wide research attention. Transition metal elements and heteroatomic doping are important methods used to enhance their catalytic performances. Lately, the construction of electrocatalysts based on metal-organic framework (MOF) electrospun nanofibers has become a research hotspot. In this work, bimetallic NixCoy-ZIF nanocrystals were synthesized in an aqueous solution, followed by NixCoy-ZIF/PAN electrospun nanofiber precursors, which were prepared by a simple electrospinning method. Bimetal (Ni-Co) porous carbon nanofiber catalysts doped with nitrogen, oxygen, and sulfur elements were obtained at high-temperature carbonization treatment in different atmospheres (Ar, Air, and H2S), respectively. The morphological properties, structures, and composition were characterized by SEM, TEM, SAED, XRD, and XPS. Also, the specific surface area of materials and their pore size distribution was characterized by BET. Linear sweep voltammetry curves investigated catalyst performances towards oxygen reduction and evolution reactions. Importantly, Ni1Co2-ZIFs/PAN-Ar yielded the best ORR activity, whereas Ni1Co1-ZIFs/PAN-Air exhibited the best OER performance. This work provides significant guidance for the preparation and characterization of multi-doped porous carbon nanofibers carbonized in different atmospheres.

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