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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 駱尚廉(Shang-Lien Lo) | |
| dc.contributor.author | Kwun-Yat Luk | en |
| dc.contributor.author | 陸觀一 | zh_TW |
| dc.date.accessioned | 2021-05-14T17:43:53Z | - |
| dc.date.available | 2017-08-07 | |
| dc.date.available | 2021-05-14T17:43:53Z | - |
| dc.date.copyright | 2015-08-07 | |
| dc.date.issued | 2015 | |
| dc.date.submitted | 2015-08-03 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/4596 | - |
| dc.description.abstract | 自1970年代石油危機，利用光能生產氫氣作為替代能源的技術逐漸受關注。起因於1972本多藤島效應的發現，以半導體受光催化來分解水的研究，成為綠色能源的新課題。隨後，水分解的異相光催化系統(Heterogeneous photocatalytic system)有賴光催化材料的改善，和犧牲劑的投入得以逐步發展。
在眾多具備光催化活性的半導體中，以二氧化鈦 (TiO2)的歷來研究最為豐富及深入，加上便宜、無毒、以及化學、光學穩定性好，二氧化鈦是最有潛力投入工業尺度應用的材料。 近年來，石墨烯受到奈米研究領域的關注。利用氧化減薄法，可以既簡便而又大量地製備氧化石墨烯 (GO)。理論上，還原氧化石墨烯 (rGO)導電性良好，加上可以進行奈米尺度的修飾，適合用作改善二氧化鈦的光催化活性。考慮石墨烯披覆於二氧化鈦的技術各式各樣，本研究分別以水熱還原法 (HrGO)、光還原法 (PrGO)及熱還原法 (TrGO)製備TiO2/rGO，並發現TiO2/HrGO在紫外光下 (365nm)催化產氫表現最好，1%披覆比例的產氫量比純TiO2提升2.7倍。 另外，本研究對二氧化鈦進行同時改質、披覆上石墨烯及進行還原，製備出二氧化鈦奈米管/還原氧化石墨烯 (TiNT/rGO)。在改質過程中，由於晶型改變使TiNT吸收峰藍移，在0%及1%披覆比例下產氫量較TiO2差。但由於比表面積大，當披覆比例提升至2%，TiNT/rGO的產氫量比純TiO2提升了13倍。 | zh_TW |
| dc.description.abstract | 1970s was known to be the time of oil crisis. Since then, technologies of utilizing light to produce hydrogen energy had drawn much attention. Hydrogen produced from water splitting was considered to be one of the potential candidates of alternative energy owing to the discovery of Honda-Fujishima effect. By applying sacrificial reagents and improving photocatalysts, heterogeneous photocatalytic system of water splitting became possible few years later.
Among various semiconductors, TiO2 is probably the most suitable material for industrial scale photocatalysts in future. TiO2 is cheap, nontoxic and stable. Its properties had also been well studied. Recently, nanomaterial researchers had been concerned about graphene. Oxidative exfoliation allows graphene oxide (GO) to be synthesized in gram-scale through facile method. Theoretically, reduced GO (rGO) possess good conductivity. Also GO is capable to be manipulated under nanometer scale, which is suitable for composition on TiO2 powder to further enhance photocatalytic activity. Considering various existing reduction methods, here in we synthesized TiO2/rGO by hydrothermal reduction (HrGO), photo-assisted reduction (PrGO) and thermal reduction (TrGO). Under UV irradiation, TiO2/HrGO was discovered to perform best among others, with 2.7 fold hydrogen production for 1%w/w compare with mere TiO2. In addition, synthesizing TiO2 nanotube (TiNT) with simultaneous composition and reduction of GO had been achieved to produce TiNT/rGO. Crystallinity changed along with nanotube fabrication and subsequent blue shift of absorption edge was observed. As a result, TiNT of 0% and 1%w/w rGO composition possess worse photocatalytic activities than that of TiO2. For the fact that specific surface area of TiNT is much higher than TiO2, hydrogen production rate of 2% composition of rGO on TiNT increased dramatically by 13 fold compare to mere TiO2 | en |
| dc.description.provenance | Made available in DSpace on 2021-05-14T17:43:53Z (GMT). No. of bitstreams: 1 ntu-104-R02541136-1.pdf: 5619916 bytes, checksum: caa184cf7807239ad49e5900b06c88b8 (MD5) Previous issue date: 2015 | en |
| dc.description.tableofcontents | 目錄
中文摘要 II Abstract III 目錄 V 圖目錄 VII 表目錄 X 第一章 緒論 1 1.1 前言 1 1.2 研究目的 2 1.3 研究內容 2 第二章 研究背景 3 2.1 光催化產氫 3 2.1.1光伏電解法 3 2.1.2太陽能集熱法 4 2.1.3光生物法 4 2.1.4光電化學法 5 2.2光催化產氫原理 6 2.2.1水分解的化學意義 6 2.2.2光觸媒催化 6 2.2.3還原電位 10 2.2.4電荷分離 12 2.3光催化材料 17 2.3.1二氧化鈦 18 2.3.2 石墨烯 19 2.3.3 二氧化鈦奈米管 22 第三章 實驗材料與方法 29 3.1 實驗藥品與設備 29 3.1.1實驗藥品 29 3.1.2實驗設備 31 3.2 實驗方法 32 3.2.1實驗設計 32 3.2.2製備氧化石墨烯 33 3.2.3製備TiO2/rGO 35 3.2.4製備TiNT/rGO 37 3.2.5光催化材料特性分析 38 3.2.6光催化產氫實驗 40 第四章 結果與討論 42 4.1特性鑑定 42 4.1.1掃描式電子顯微鏡/X光能量分散光譜儀 42 4.1.2 穿透式電子顯微鏡 44 4.1.3傅立葉轉換紅外光譜儀 49 4.1.4 X光粉末繞射圖譜 51 4.1.5 紫外-可見光吸收度圖譜 55 4.2 光催化產氫 59 4.2.1空白實驗 59 4.2.2 TiO2/rGO 60 4.2.3 TiNT/rGO 62 4.3 rGO與光催化效率之關係 66 第五章 結論及建議 68 5.1 結論 68 5.2 建議 69 參考文獻 70 附錄 82 | |
| dc.language.iso | zh-TW | |
| dc.title | 以石墨烯修飾二氧化鈦粒子及奈米管進行光催化甲醇溶液產氫之研究 | zh_TW |
| dc.title | Photocatalytic Hydrogen Production in Methanol Solution using Graphene Composited TiO2 particles and Nanotubes under Light Irradiation | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 103-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林正芳(Cheng-Fang Lin),張慶源(Ching-Yuan Chang) | |
| dc.subject.keyword | 二氧化鈦,石墨烯,奈米管,異相光催化系統,氫氣, | zh_TW |
| dc.subject.keyword | Graphene,Nanotube,Heterogeneous photocatalytic system,Hydrogen,Titanium dioxide, | en |
| dc.relation.page | 86 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2015-08-04 | |
| 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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