Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries
碩士 === 國立中正大學 === 化學工程研究所 === 102 === Mesoporous TiO2 nano films were synthesized with a variety of calcination temperature and film thickness for water splitting application. The characterization of the materials were conducted with scanning electron microscope (SEM), X-ray diffraction (XRD), Raman...
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ndltd-TW-102CCU000630692019-05-15T21:23:37Z http://ndltd.ncl.edu.tw/handle/8966jz Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries 中孔洞二氧化鈦薄膜應用於光催化分解水產氫及靜電紡絲法製備奈米碳纖維應用於鋰離子二次電池之負極材料 Jing-Ru Hung 洪靜如 碩士 國立中正大學 化學工程研究所 102 Mesoporous TiO2 nano films were synthesized with a variety of calcination temperature and film thickness for water splitting application. The characterization of the materials were conducted with scanning electron microscope (SEM), X-ray diffraction (XRD), Raman analysis and UV–Vis spectra in order to know the ratio of the anatase and rutile phases of the TiO2. The experiments of water splitting were carried out with mesoporous TiO2 nano films. The results indicated that the nano film with 60 nm in thickness and synthesized at 500 °С had a higher photocurrent density of 1.149 mA/cm2 . The yield of hydrogen (45.15 μmol) 3 times than that of Sputter TiO2 and Degussa P25 thin film. The second part of research is the formation of the carbon nano fibers (CNF) by electrospinning, stabilization and carbonnization using polyacrylonitrile (PAN) as the precursor of carbon nanofibers. The diameter of CNF was about 320 nm while the length was about several meters. CNF, carbon nano particle (CNP) and mesocarbon microbead (MCMB) were analyzed by SEM, TEM, Raman and XRD. It was found that the CNF and CNP were turbostratic carbon, while the MCMB was the form of graphite. Three materials were used as anode materials for Li-ion batteries. The experimental results of the electrochemical studies showed that the CNP obtained the highest initial discharge capacity 385.17 mAh/g while the CNF and CNP had higher irreversible capacity. It was mainly because of the formation of SEI on the amorphous carbon. The MCMB obtained the highest initial coulombic efficiency 94.76 %. After ten cycles, the three materials had coulombic efficiency of more than 95 %, and the CNF had highest charge capacity 285.57 mAh/g, while MCMB was only 249.57 mAh/g. CNF was a higher capacity compared with commercial MCMB. Yuan-Yao Li 李元堯 2014 學位論文 ; thesis 166 zh-TW |
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碩士 === 國立中正大學 === 化學工程研究所 === 102 === Mesoporous TiO2 nano films were synthesized with a variety of calcination temperature and film thickness for water splitting application. The characterization of the materials were conducted with scanning electron microscope (SEM), X-ray diffraction (XRD), Raman analysis and UV–Vis spectra in order to know the ratio of the anatase and rutile phases of the TiO2.
The experiments of water splitting were carried out with mesoporous TiO2 nano films. The results indicated that the nano film with 60 nm in thickness and synthesized at 500 °С had a higher photocurrent density of 1.149 mA/cm2 . The yield of hydrogen (45.15 μmol) 3 times than that of Sputter TiO2 and Degussa P25 thin film.
The second part of research is the formation of the carbon nano fibers (CNF) by electrospinning, stabilization and carbonnization using polyacrylonitrile (PAN) as the precursor of carbon nanofibers. The diameter of CNF was about 320 nm while the length was about several meters. CNF, carbon nano particle (CNP) and mesocarbon microbead (MCMB) were analyzed by SEM, TEM, Raman and XRD. It was found that the CNF and CNP were turbostratic carbon, while the MCMB was the form of graphite. Three materials were used as anode materials for Li-ion batteries.
The experimental results of the electrochemical studies showed that the CNP obtained the highest initial discharge capacity 385.17 mAh/g while the CNF and CNP had higher irreversible capacity. It was mainly because of the formation of SEI on the amorphous carbon. The MCMB obtained the highest initial coulombic efficiency 94.76 %. After ten cycles, the three materials had coulombic efficiency of more than 95 %, and the CNF had highest charge capacity 285.57 mAh/g, while MCMB was only 249.57 mAh/g. CNF was a higher capacity compared with commercial MCMB.
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author2 |
Yuan-Yao Li |
author_facet |
Yuan-Yao Li Jing-Ru Hung 洪靜如 |
author |
Jing-Ru Hung 洪靜如 |
spellingShingle |
Jing-Ru Hung 洪靜如 Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries |
author_sort |
Jing-Ru Hung |
title |
Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries |
title_short |
Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries |
title_full |
Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries |
title_fullStr |
Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries |
title_full_unstemmed |
Synthesis of Mesoporous TiO2 Films and Its Application of Photocatalytic Water Splitting and Synthesis of Carbon Nanofibers by Electrospinning as Anode Material for Li-ion Batteries |
title_sort |
synthesis of mesoporous tio2 films and its application of photocatalytic water splitting and synthesis of carbon nanofibers by electrospinning as anode material for li-ion batteries |
publishDate |
2014 |
url |
http://ndltd.ncl.edu.tw/handle/8966jz |
work_keys_str_mv |
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