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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 駱尚廉 | |
| dc.contributor.author | Yi-Chun Lai | en |
| dc.contributor.author | 賴宜君 | zh_TW |
| dc.date.accessioned | 2021-06-16T16:02:26Z | - |
| dc.date.available | 2016-07-01 | |
| dc.date.copyright | 2013-07-18 | |
| dc.date.issued | 2013 | |
| dc.date.submitted | 2013-07-07 | |
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(2009), “Visible-light-driven hydrogen production with extremely high quantum efficiency on Pt-PdS/CdS photocatalyst”, Journal of Catalysis, 266 (2), 165-168. 45. Yi, Q., Chen, A., Huang, W., Zhang, J., Liu, X., Xu, G., and Zhou, Z. (2007), “Titanium-supported nanoporous bimetallic Pt-Ir electrocatalysts for formic acid oxidation”, Electrochemistry Communications, 9 (7), 1513-1518. 46. Zhang, D. F. (2012), “Visible light-induced photocatalysis through surface 78 plasmon excitation of platinum-metallized titania for photocatalytic bleaching of rhodamine B”, Monatshefte Fur Chemie, 143 (5), 729-738. 47. Zhang, Y. J. and Zhang, Li (2009), “Photocatalytic degradation of formic acid with simultaneous production of hydrogen over Pt and Ru-loaded CdS/Al-HMS photocatalysts”, Desalination, 249 (3), 1017-1021. 48. Zong, X., Yan, H., Wu, G., Ma, G., Wen, F., Wang, L., and Li, C. (2008), “Enhancement of photocatalytic H2 evolution on CdS by loading MoS2 as cocatalyst under visible light irradiation”, Journal of the American Chemical Society, 130 (23), 7176 49. Zou, Z.G., Ye, J.H., Sayama, K., and Arakawa, H. (2001), “Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst”, Nature, 414 (6864), 625-627. 50. Zwilling, V., Aucouturier, M., and Darque-Ceretti, E. (1999), “Structure and physicochemistry of anodic oxide films on titanium and TA6V alloy”, Surface and Interface Analysis, 27 (7), 629-637. 51. Zhao, Y.F., Zhang, H.Y., Huang, C.L., Chen, S., Liu, Z.M. (2012), “Pt/titania/reduced graphite oxide nanocomposite: An efficient catalyst for nitrobenzene hydrogenation”, Journal of Colloid and Interface Science, 374, 83-88. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/62430 | - |
| dc.description.abstract | 石油燃料的枯竭、全球暖化的加劇，研發與推動新能源技術一刻不容緩。在
眾多的再生能源當中，氫能最備受矚目，先進國家視其為最具潛力的明星能源產 業，近年來，皆積極投入大量的研究資源於其中。氫能源擁有許多優勢，其不具 毒性、為宇宙中最單純的元素，除此之外，最重要的是，氫能能量密度為石油燃 料的三倍，且水為唯一反應產物。 光觸媒是相當具有發展潛力的綠色環保材料，近年來，亦有不少研究利用光 觸媒分解水產氫。本研究為提升現有二氧化鈦光觸媒之水解產氫效率，選用改質 之奈米鈦管於甲酸溶液中進行產氫研究。研究指出，甲酸能夠有效地擔任電洞捕 捉劑，延緩電子電洞對再結合，而微波水熱法製成之奈米鈦管因擁有特殊的管狀 外形、材料分布均勻、與高比表面積的特性，相對於二氧化鈦，能夠披覆上較高 比例的共觸媒，有利於增加產氫量。硫化鎘與貴重金屬鉑為本研究披覆上奈米鈦 管之共觸媒，硫化鎘能夠有效地移轉吸收光譜至可見光區，而鉑可以提高觸媒活 性、延長電子電洞對分離的生命週期。 實驗結果顯示，常溫下以 150W 的可見光催化 10 vol%甲酸溶液，利用光沉 積法披覆上鉑之 1wt%Pt/CdS/TNTs 擁有最好的產氫效率，達 640 μmol．g -1h-1，其次為純 CdS/TNTs，效率達 363 μmol．g-1h-1，而使用CdS/TiO2 的產氫率只有123 μmol．g-1h-1。輔以物化分析結果顯示，以 TNTs 作為載體時，能夠披覆上較高比例之共觸媒，且 TNTs 可作為犧牲材料，包覆金屬於管狀中，因此不易被空氣氧化。 至於動力操作實驗中，參數包括溫度、pH 值的調控。發現 CdS/TNTs 隨著 反應環境溫度上升，產氫率也隨之上升，溫度 45℃時，氫氣生成量為 478mol．IIIg-1h-1，是常溫的 1.3 倍，然而 CdS/TiO2 即使溫度改變，其產氫效率仍然沒變，因此可知，；反應環境酸鹼值的改變顯示出，離子態的甲酸要比分子態的甲酸分子容易與觸媒接觸、產生反應。因此，高溫度、低 pH 值的反應條件有助於提升CdS/TNTs 光觸媒之產氫效率。 披覆上貴重金屬鉑的方法有很多，本實驗分別使用熱含浸法與光沉積法試驗 之。熱含浸法雖簡易、方便，但合成的鉑易在觸媒表面形成不均勻的大顆粒，遮 蔽效應反而使得觸媒的活性下降；相對地，光沉積法則可披覆上顆粒均勻、細緻 的金屬粒子於觸媒表面。因此，利用光沉積法披覆鉑於觸媒上，為本研究較適宜 的方法。 | zh_TW |
| dc.description.abstract | Hydrogen gas is one of the most promising renewable energy sources and the final product of hydrogen combustion is nothing but water. Recently, many researches have been conducted to produce hydrogen from water using catalytic photosynthesis.
The research investigated the rates of hydrogen production from water using formic acid and visible light with several types of catalysts (CdS/Titanate nanotubes,CdS/TiO2, Pt/CdS/TNTs by photodeposition, Pt/CdS/TiO2 by thermal impregnation,and Pt/CdS/TNTs by thermal impregnation). Due to the specific geometry of TNTs, more CdS can be attached onto the TNTs surface than to with that of TiO2’s, so the yield of hydrogen is much higher with CdS/TNTs than CdS/TiO2 under 150W visible light. The hydrogen production with CdS/TNTs achieved 363μmol．g-1 h-1, which is about three times higher than that with CdS/TiO2’s. As the temperature elevated to 45℃ from 25℃, the H2 production with CdS/TNTs reached 478μmol．g-1h-1, while the H2 production with CdS/TiO2 did not show much change with temperature. Lower pH has a better affinity to formic acid will mainly be in an ionic form. Consequently, lower pH helps produce enhanced H2 production. Moreover, coating of platinum onto the photocatalysts could further promote the reaction. Results showed that 1wt%Pt/CdS/TNTs made by photodeposition method had the best hydrogen production, 640μmol．g-1h-1 under ambient condition. Surface properties of the photocatalysts was categorized using scanning electron microscopy/energy dispersive X-ray (SEM/EDX), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopic(XPS). | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T16:02:26Z (GMT). No. of bitstreams: 1 ntu-102-R99541116-1.pdf: 5350214 bytes, checksum: d7fd9a3378d602c3730db5aaadd97993 (MD5) Previous issue date: 2013 | en |
| dc.description.tableofcontents | 謝誌.......................................................I
摘要......................................................II Abstract..................................................IV 第一章 緒論.................................................1 第二章 文獻回顧 .............................................3 2-1 甲酸溶液產氫理論..........................................3 2-2 甲酸之基本物化特性.........................................................5 2-3 光觸媒..................................................6 2-3-1 氧化鈦奈米管...........................................7 2-3-2 硫化鎘................................................8 2-3-3 貴重金屬鉑...........................................11 第三章 材料與方法 ..........................................13 3-1 藥品與設備.............................................13 3-2 實驗設計...............................................15 3-3 材料製備...............................................17 3-4 液相甲酸溶液光催化反應....................................20 3-5 分析..................................................21 3-5-1 材料物化分析..........................................21 3-5-2 氫氣與甲酸定量分析.....................................23 第四章 結果與討論 ...........................................25 4-1 光觸媒材料特性鑑定.......................................25 4-2 觸媒選擇實驗............................................36 4-3 反應操作動力試驗.........................................43 4-3-1 溫度................................................43 4-3-2 pH 值...............................................48 4-4 化學分析電子分光儀(ESCA)測量..............................50 4-4 甲酸降解量.............................................63 4-5 光催化機制.............................................64 4-6 產氫結果比較............................................66 第五章 結論與建議 ...........................................69 5-1 結論..................................................69 5-2 建議..................................................71 第六章 參考文獻 ............................................73 附錄 .....................................................79 | |
| dc.language.iso | zh-TW | |
| dc.subject | 奈米鈦管 | zh_TW |
| dc.subject | 二氧化鈦 | zh_TW |
| dc.subject | 鉑 | zh_TW |
| dc.subject | 甲酸 | zh_TW |
| dc.subject | 氫氣 | zh_TW |
| dc.subject | 硫化鎘 | zh_TW |
| dc.subject | 氧化鈦奈米管 | zh_TW |
| dc.subject | Platinum | en |
| dc.subject | Photocatalyst | en |
| dc.subject | Titanium dioxide | en |
| dc.subject | Titanium nanotubes | en |
| dc.subject | Cadium sulfide | en |
| dc.subject | Hydrogen | en |
| dc.subject | Formic acid | en |
| dc.title | 硫化鎘奈米鈦管以可見光催化甲酸溶液之產氫研究 | zh_TW |
| dc.title | Production of Hydrogen from Water Using Formic Acid and CdS/Titanate Nanotubes with Visible Light Irradiation | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 101-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 郭繼汾(Chi-Fen Kuo),張嘉玲,闕蓓德 | |
| dc.subject.keyword | 甲酸,二氧化鈦,奈米鈦管,氧化鈦奈米管,硫化鎘,鉑,氫氣, | zh_TW |
| dc.subject.keyword | Hydrogen,Photocatalyst,Titanium dioxide,Titanium nanotubes,Cadium sulfide,Platinum,Formic acid, | en |
| dc.relation.page | 86 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2013-07-08 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
| 顯示於系所單位： | 環境工程學研究所 | |
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