Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers

碩士 === 國立中正大學 === 化學工程研究所 === 101 === This study was divided into two parts, first part of study is formation of Carbon nanofibers (CNFs) by different catalyst system (Ni/Al and Ni/Cu) for a calcinations process. Metal nitrate was used as catalyst precursor and mixed with PEG and DI water and calcin...

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Main Authors: Yu-Wen Shih, 施育文
Other Authors: Yuan-Yao Li
Format: Others
Language:zh-TW
Published: 2013
Online Access:http://ndltd.ncl.edu.tw/handle/16644240791368736429
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spelling ndltd-TW-101CCU000630182015-10-13T22:18:44Z http://ndltd.ncl.edu.tw/handle/16644240791368736429 Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers 奈米碳纖維的合成及利用奈米碳纖維製作石墨烯量子點 Yu-Wen Shih 施育文 碩士 國立中正大學 化學工程研究所 101 This study was divided into two parts, first part of study is formation of Carbon nanofibers (CNFs) by different catalyst system (Ni/Al and Ni/Cu) for a calcinations process. Metal nitrate was used as catalyst precursor and mixed with PEG and DI water and calcined at air environment with a desired temperature. CNFs were synthesized by polymer pyrolysis method. The mixture as reactant was prepared by a mixture of PEG and HCl, which were employed as carbon source and promoter, respectively. Different types of CNFs such as platelet graphite nanofibers (PGNFs) and turbostratic CNFs were synthesized with different catalyst systems. It was found that the diameter of CNFs was changed by controlling the reaction temperature. Graphene quantum dots (GQDs) were derived from PGNFs by liquid-phase exfoliation method. The structure of PGNFs was graphene nanosheets stacked perpendicular along the fiber axis. The organic solvent dimethyl sulfoxide (DMSO) was used which the surface tension is able to overcome the van der waals force between graphene layers. Characterization of GQDs by TEM, AFM, XPS and Raman spectrum, was conducted. According to characterization results, the diameter distribution of GQDs was about 11-27 nm and less than 5 layers. Low amount of oxygen group on GQDs surface was observed by XPS. This study was first time to derive GQD from PGNFs by liquid-phase exfoliation method. The size of GQDs can be effectively controlled by the use of PGNFs as starting materials. Yuan-Yao Li 李元堯 2013 學位論文 ; thesis 137 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 國立中正大學 === 化學工程研究所 === 101 === This study was divided into two parts, first part of study is formation of Carbon nanofibers (CNFs) by different catalyst system (Ni/Al and Ni/Cu) for a calcinations process. Metal nitrate was used as catalyst precursor and mixed with PEG and DI water and calcined at air environment with a desired temperature. CNFs were synthesized by polymer pyrolysis method. The mixture as reactant was prepared by a mixture of PEG and HCl, which were employed as carbon source and promoter, respectively. Different types of CNFs such as platelet graphite nanofibers (PGNFs) and turbostratic CNFs were synthesized with different catalyst systems. It was found that the diameter of CNFs was changed by controlling the reaction temperature. Graphene quantum dots (GQDs) were derived from PGNFs by liquid-phase exfoliation method. The structure of PGNFs was graphene nanosheets stacked perpendicular along the fiber axis. The organic solvent dimethyl sulfoxide (DMSO) was used which the surface tension is able to overcome the van der waals force between graphene layers. Characterization of GQDs by TEM, AFM, XPS and Raman spectrum, was conducted. According to characterization results, the diameter distribution of GQDs was about 11-27 nm and less than 5 layers. Low amount of oxygen group on GQDs surface was observed by XPS. This study was first time to derive GQD from PGNFs by liquid-phase exfoliation method. The size of GQDs can be effectively controlled by the use of PGNFs as starting materials.
author2 Yuan-Yao Li
author_facet Yuan-Yao Li
Yu-Wen Shih
施育文
author Yu-Wen Shih
施育文
spellingShingle Yu-Wen Shih
施育文
Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers
author_sort Yu-Wen Shih
title Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers
title_short Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers
title_full Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers
title_fullStr Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers
title_full_unstemmed Synthesis of Carbon Nanofibers and Derive Graphene Quantum Dots from Carbon Nanofibers
title_sort synthesis of carbon nanofibers and derive graphene quantum dots from carbon nanofibers
publishDate 2013
url http://ndltd.ncl.edu.tw/handle/16644240791368736429
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