Raman Spectroscopic Characterization for Carbon Nanofibers Produced by Using Ferric Chloride of Different Concentration as Catalyst Precursor

2007 ◽  
Vol 26-28 ◽  
pp. 809-812
Author(s):  
Fei Li ◽  
Xiao Ping Zou ◽  
Jin Cheng ◽  
Hong Dan Zhang ◽  
Peng Fei Ren ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Carbon Nanofibers ◽  
Ferric Chloride ◽  
Precursor Solution ◽  
Spectroscopic Characterization ◽  
Copper Plate ◽  
Catalyst Precursor ◽  
Raman Spectroscopic ◽  
Scanning Electron

Catalytic grown carbon nanofibers have been obtained from decomposition of ethanol over copper plate. Ferric chloride of different concentration was employed as the catalyst precursor. Scanning electron microscopy has shown that different morphologies of carbon nanofibers can be obtained by using different concentration of catalyst precursor solution. The results from the Raman spectroscopic characterization have also demonstrated that the graphitization of carbon nanofibers can be tailored by control of the concentration of catalyst precursor solution. When the information from these characterization are combined with that of the associated morphologies of the carbon nanofibers, it is possible to synthesize perfect carbon nanofibers.

Raman Spectroscopic Characterization of Carbon Nanofibers Obtained by Using Metal Chloride as Catalyst Precursor

2007 ◽  
Vol 561-565 ◽  
pp. 1387-1390
Author(s):  
Fei Li ◽  
Xiao Ping Zou ◽  
Jin Cheng ◽  
Hong Dan Zhang ◽  
Peng Fei Ren ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nanofibers ◽  
Amorphous Carbon ◽  
Spectroscopic Characterization ◽  
Copper Plate ◽  
Metal Chloride ◽  
Catalyst Precursor ◽  
Raman Spectroscopic ◽  
Degree Of Graphitization

Carbon nanofibers have been obtained by the interaction of ethanol with metal chloride over copper plate. Different metal chloride was used as the catalyst precursor. The products were characterized by the Raman spectroscopy for the degree of graphitization. The relative intensities and the amount of amorphous carbon were estimated. The results indicate that the catalyst precursor has effects on the degree of graphitization of carbon nanofibers.

Influence of Carbon Sources and Catalytic Precursors on the Products Prepared by Catalytic Combustion

2008 ◽  
Vol 47-50 ◽  
pp. 912-915
Author(s):  
Mao Fa Wang ◽  
Xiao Ping Zou ◽  
Jin Cheng ◽  
Guang Zhu ◽  
Yi Su
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanofibers ◽  
Catalytic Combustion ◽  
Carbon Sources ◽  
Combustion Process ◽  
Deep Understanding ◽  
Precursor Solution ◽  
Controlled Synthesis ◽  
Catalyst Precursor ◽  
Scanning Electron

It is very important to study the effects of various factors on synthesis of carbon nanofibers for controlled synthesis, which plays a significant role in realizing desired nanostructures or nanodevices for applications. In this report, we employed different carbon source and different catalyst precursor solution, respectively, and studied the effects of those on carbon nanofibers that were synthesized by catalytic combustion process. We have characterized the as-grown carbon nanofibers by employing scanning electron microscopy (SEM) for deep understanding.

scholarly journals Supercapacitors based on graphene/pseudocapacitive materials

2017 ◽  
Vol 82 (4) ◽  
pp. 411-416
Author(s):  
Denis Sacer ◽  
Magdalena Kralj ◽  
Suzana Sopcic ◽  
Milica Kosevic ◽  
Aleksandar Dekanski ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Precursor Solution ◽  
Single Step ◽  
X Ray ◽  
Supercapacitor Application ◽  
Microwave Assisted ◽  
Simultaneous Synthesis ◽  
Insight Into ◽  
Scanning Electron

Composites of graphene and SnO2 were successfully prepared by a single step simultaneous synthesis of SnO2 and reduction of graphene oxide (GO). Three different compositions of precursor solution resulted in different composite materials containing graphene and SnO2. The reaction was realized by microwave-assisted hydrothermal synthesis. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) gave insight into the morphology and composition of the obtained materials. Good capacitive/pseudocapacitive properties of the obtained material suitable for supercapacitor application were registered by cyclic voltammetry, from where specific capacitance values up to 93 F g-1 were determined.

Fabricating TiO2 Coated ZnO Nanowire Array/Graphene Heterostructure

2012 ◽  
Vol 430-432 ◽  
pp. 45-48
Author(s):  
Yong Qiang He ◽  
Si Yao He ◽  
Na Na Zhang ◽  
Wen Chao Wang ◽  
Hong Sun ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Zno Nanoparticles ◽  
Nanowire Array ◽  
Precursor Solution ◽  
Zno Nanowire ◽  
Reaction Conditions ◽  
Graphene Surface ◽  
Hydrolysis Method ◽  
Scanning Electron

ZnO nanowire array supported on the graphene surface was fabricated by thermo hydrolysis method. The ZnO nanoparticles (seed crystals) were first deposited on GO surface and then ZnO nanoparticles grew to ZnO nanowire array when the seed crystal side was hung upside down and touched with ZnO precursor solution during the process of thermo hydrolysis. The ZnO nanowire array was then coated with TiO2 precursor, hydrolyzed and turned to crystalline TiO2. The formed ZnO/TiO2/graphene composites have different structure depending on the reaction conditions and their morphology was observed with scanning electron microscopy.

Synthesis of Carbon Nanofibers by Ethanol Catalytic Combustion Technique

2007 ◽  
Vol 26-28 ◽  
pp. 731-734
Author(s):  
Peng Fei Ren ◽  
Xiao Ping Zou ◽  
Jin Cheng ◽  
Hong Dan Zhang ◽  
Fei Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Carbon Nanofibers ◽  
Helical Structure ◽  
Copper Plate ◽  
Iron Chloride ◽  
Catalyst Precursor ◽  
Iron Nitrate ◽  
Transmission Electron ◽  
Simple Growth

In this paper, we report a simple growth of carbon nanofibers by means of the combustion of ethyl alcohol. In our experiment, copper plate was employed as substrate, iron nitrate and iron chloride as catalyst precursor and ethanol as carbon source. The as-grown carbon nanofibers were characterized by employing scanning electron microscopy, transmission electron microscopy, high-resolution field-emission transmission electron microscopy and Reinshaw optical confocal Raman spectroscopy. Our results suggested that it would tend to form relatively uniform nanofibers when the catalyst precursor was iron nitrate, however, to form some helical structure nanofibers when the catalyst precursor was iron chloride. The sample using iron chloride as the catalyst precursor has a higher graphitization degree than that using iron nitrate as the catalyst precursor.

Synthesis, structure, and gas sensitivity properties of SnO2–CuO mixture phase obtained by pyrolysis of an aerosol

1997 ◽  
Vol 12 (2) ◽  
pp. 560-565
Author(s):  
J. Román ◽  
J. C. Fabian ◽  
M. Labeau ◽  
G. Delabouglise ◽  
M. Vallet-Regí
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Precursor Solution ◽  
Spherical Particles ◽  
Ultrahigh Frequency ◽  
Gas Sensitivity ◽  
Mixture Phase ◽  
Scanning Electron

SnO2–CuO mixture phase has been prepared by pyrolysis of an aerosol produced by ultrahigh frequency of different precursor solutions. As-received samples were annealed in different conditions to study the influence of the temperature on the microstructure. Scanning electron microscopy showed that the samples consisted of hollow spherical particles and rings, depending on the precursor solution utilized. The evolution of conductance under both pure and polluted air is discussed.

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