The Morphologies of Nano Carbon Growing In Situ by Catalytic Chemical Vapor Deposition

2012 ◽  
Vol 430-432 ◽  
pp. 1269-1272
Author(s):  
Xian Feng Xu ◽  
Yan Yan Hu ◽  
Peng Xiao
Keyword(s):  
Chemical Vapor Deposition ◽  
Electron Microscope ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Carbon Nanofiber ◽  
Chemical Vapor ◽  
Catalytic Chemical Vapor Deposition ◽  
Operation Conditions ◽  
Nano Carbon

In order to improve surface characteristics of carbon fibers, using nickel granules as catalysts, nano carbon with different morphologies was deposited in-situ on the surface of carbon fibers by the method of Chemical Vapor Deposition (CVD). The observations by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) indicated that keeping the excellent performance of plating nickels catalyst and a suitable deposition rate of Pyrogenation Carbon (PyC) are the key factors for getting Carbon Nanotube and Carbon Nanofiber (CNT/CNF). In this experiment, the optimum operation conditions are: plating time at 5min, deposition temperature at 1173K, deposition time at 2 hours, flow of C3H6, H2 and N2 at 30, 200 and 400ml/min respectively, deposition pressure at 700-1000Pa. Evolution rules of nano carbon are explained in growth mechanism of Catalytic Chemical Vapor Deposition (CCVD).

Growth and Microstructure of Submicro-Scaled Graphitic Flakes on Carbon Fibers by Catalytic Chemical Vapor Deposition

2013 ◽  
Vol 275-277 ◽  
pp. 1746-1750
Author(s):  
Hai Zhang ◽  
Ling Jun Guo ◽  
Yang Xi Fu ◽  
He Jun Li ◽  
Ke Zhi Li
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Iron Hydroxide ◽  
Chemical Vapor ◽  
Domain Size ◽  
Ferric Chloride Solution ◽  
Catalytic Chemical Vapor Deposition ◽  
Graphitization Degree

Submicro-scaled graphite flakes with uniform distribution on the surface of carbon fiber were grown in situ by catalytic chemical vapor deposition with natural gas as feedstock. Morphology and structure parameter of graphite flakes were characterized by scanning electron microscope and Raman spectroscopy respectively. The results show that graphite flakes with assistance of iron hydroxide aqueous collosol had better shape, higher density and graphitization degree compared with specimen prepared with ferric chloride solution. The size in plane of as grown graphite flakes is in the range of 1-3 μm. Microcrystal domain size of graphite flakes is calculated about 5 nm according to ration of intensity of D band to G band in Raman spectra.

Ti3C2MXenes modified with in situ grown carbon nanotubes for enhanced electromagnetic wave absorption properties

2017 ◽  
Vol 5 (16) ◽  
pp. 4068-4074 ◽  
Author(s):  
Xinliang Li ◽  
Xiaowei Yin ◽  
Meikang Han ◽  
Changqing Song ◽  
Hailong Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Wave ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Catalytic Chemical Vapor Deposition ◽  
Wave Absorption

Ti3C2TxMXenes modified within situgrown carbon nanotubes (CNTs) are fabricatedviaa simple catalytic chemical vapor deposition (CVD) process.

scholarly journals Production of Carbon Nanofibers Using a CVD Method with Lithium Fluoride as a Supported Cobalt Catalyst

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
S. A. Manafi ◽  
S. H. Badiee
Keyword(s):  
Chemical Vapor Deposition ◽  
Electron Microscope ◽  
Carbon Nanofibers ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
High Yield ◽  
Scale Production ◽  
Catalytic Chemical Vapor Deposition ◽  
Fundamental Understanding

Carbon nanofibers (CNFs) have been synthesized in high yield (>70%) by catalytic chemical vapor deposition (CCVD) on Co/LiF catalyst using acetylene as carbon source. A novel catalyst support (LiF) is reported for the first time as an alternative for large-scale production of carbon nanofibers while purification process of nanofibers is easier. In our experiment, the sealed furnace was heated at700∘Cfor 0.5 hour (the heating rate was10∘C/min) and then cooled to room temperature in the furnace naturally. Catalytic chemical vapor deposition is of interest for fundamental understanding and improvement of commercial synthesis of carbon nanofibers (CNFs). The obtained sample was sequentially washed with ethanol, dilutes acid, and distilled water to remove residual impurities, amorphous carbon materials, and remaining of catalyst, and then dried at110∘Cfor 24 hours. The combined physical characterization through several techniques, such as high-resolution transmission electron microscope (TEM), scanning electron microscope (SEM), thermogarvimetric analysis (TGA), and zeta-sizer and Raman spectroscopy, allows determining the geometric characteristic and the microstructure of individual carbon nanofibers. Catalytic chemical vapor deposition is of interest for fundamental understanding and improvement of commercial synthesis of carbon nanofibers (CNFs). As a matter of fact, the method of CCVD guarantees the production of CNFs for different applications.

In situ plasma diagnostics for chemical vapor deposition of nano-carbon thin film materials

2003 ◽  
Vol 69 (2-4) ◽  
pp. 446-451 ◽  
Author(s):  
A.N. Obraztsov ◽  
A.A. Zolotukhin ◽  
A.O. Ustinov ◽  
A.P. Volkov ◽  
Yu. Svirko ◽  
...  
Keyword(s):  
Thin Film ◽  
Chemical Vapor Deposition ◽  
Plasma Diagnostics ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Carbon Thin Film ◽  
Nano Carbon

scholarly journals In Situ Evaluation of the Factors Controlling Carbon Nanotube Synthesis During Catalytic Chemical Vapor Deposition

2011 ◽  
Vol 17 (S2) ◽  
pp. 1520-1521
Author(s):  
R Sharma
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Catalytic Chemical Vapor Deposition ◽  
Carbon Nanotube Synthesis

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

The Effect of Temperature on the Structure of Cotton Carbon Fiber by Chemical Vapor Deposition

2015 ◽  
Vol 781 ◽  
pp. 671-674
Author(s):  
Jindamanee Nissayan ◽  
Saifon Kruehong ◽  
Chaiyaput Kruehong ◽  
Apichat Artnaseaw
Keyword(s):  
Chemical Vapor Deposition ◽  
Electron Microscope ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Average Diameter ◽  
Effect Of Temperature ◽  
Synthesis Process ◽  
Transmission Electron ◽  
Different Temperatures

Synthesis of carbon fibers of cotton by chemical vapor deposition (CDV) method is the main focus of this study. Having ferocene as the catalyst, the study explored effects of synthesis process at different temperatures (750°C, 850°C and 950°C). Analysis of size, shape and structure were conducted using scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman spectroscope. The result showed that average diameter of carbon fibers tended to increase according to temperature. In addition, it was found that surface of the fiber is bend and helical. Also, higher temperature affected graphitic of the fiber.

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