以氧化鈦奈米管製備混相二氧化鈦光觸媒

Yu-Wei Yeh; 葉育瑋

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完整後設資料紀錄

DC 欄位	值	語言
dc.contributor.advisor	簡淑華
dc.contributor.author	Yu-Wei Yeh	en
dc.contributor.author	葉育瑋	zh_TW
dc.date.accessioned	2021-06-13T04:14:44Z	-
dc.date.available	2006-07-31
dc.date.copyright	2006-07-31
dc.date.issued	2006
dc.date.submitted	2006-07-25
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dc.identifier.uri	http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/32749	-
dc.description.abstract	本研究以水熱法製備氧化鈦奈米管，再將之置於酸溶液中進行相轉變製得anatase及rutile純相或混晶相二氧化鈦光觸媒。兩晶相的比例可藉由改變處理溫度及酸濃度達到有效的調控。製得樣品以X光繞射光譜(XRD)、拉曼光譜(Raman)、高解析穿透式電子顯微鏡(HRTEM)、氮氣等溫吸附脫附、X光吸收光譜(XAS)、擴散反射式紫外線-可見光光譜(UV-vis)、傅立葉轉換紅外線光譜(FT-IR)及原子吸收光譜(AAS)等鑑定分析其結構及組成特性。觸媒的光催化活性以亞甲基藍脫色反應評估。以水熱法製得的氧化鈦奈米管呈多層管壁(層間距約0.8 nm)及尾端開口，其外徑約8至9 nm，而內徑約4至5 nm。研究結果顯示奈米管在較低的反應溫度時，需要較高的HNO3濃度才能進行相轉換。在特定溫度下，anatase/rutile比值隨酸濃度升高而下降。以HCl或H2SO4處理奈米管的相轉換結果和以相同濃度HNO3處理所得產物極為類似。在稀酸處理中，奈米管結構相轉換成anatase的速率高於相轉換成rutile的速率。相較於氧化鈦奈米管，以溶劑水熱法製得的氧化鈦奈米棒在酸溶液中的相轉換需要較高的處理溫度及酸濃度。亞甲基藍脫色反應顯示氧化鈦奈米管及奈米棒經酸處理相轉換成anatase及rutile純相或混晶相二氧化鈦後，其光催化活性有顯著的提升。以氧化鈦奈米管為前趨物，經過80 oC 0.05 M 硝酸處理24小時所製得的觸媒具有純anatase晶相及最高表面積(192 m2/g)，在各樣品間表現最佳的光催化活性。	zh_TW
dc.description.provenance	Made available in DSpace on 2021-06-13T04:14:44Z (GMT). No. of bitstreams: 1 ntu-95-R93223063-1.pdf: 5395597 bytes, checksum: 39afce91d74a6ba20a3e136e5c4e746c (MD5) Previous issue date: 2006	en
dc.description.tableofcontents	摘要 …………………………………………………………………. I Abstract…………………………………………………………... II 目錄 ………………………………………………………………. III 圖索引 ……………………………………………………………... V 表索引 ………………………………………….……........... IX 第一章緒論 ………………………………………….……….. - 1 - 1.1 二氧化鈦的簡介 ……………………….…............. - 1 - 1.2 混相二氧化鈦的文獻回顧……………………………….. .- 5 - 1.3 氧化鈦奈米管的文獻回顧 ………….……............. - 7 - 1.4 研究動機 ……………………………….…............ - 13 - 第二章實驗方法 ……………………………………………… - 16 - 2.1 藥品、氣體及儀器 ……………………….…………….. - 16 - 2.2 觸媒製備 ………………………………….……………… - 18 - 2.2.1 氧化鈦奈米管Dnt 及Jnt 之製備 ………..………... - 18 - 2.2.2 氧化鈦奈米棒Tnr 之製備 …….……………………… - 18 - 2.2.3 相轉換酸處理 ……………….………………………… - 20 - 2.3 觸媒之特性分析 ………………………............... - 23 - 2.3.1 原子吸收光譜 (AAS) …………………............. - 23 - 2.3.2 X 射線繞射光譜 (XRD) ………………............. - 23 - 2.3.3 拉曼光譜 (Raman) ……………………………………. - 24 - 2.3.4 高解析穿透式電子顯微鏡 (HRTEM) ………………... - 25 - 2.3.5 氮氣等溫吸附脫附 …………………………………... - 25 - 2.3.6 擴散反射式紫外線-可見光光譜 (UV-vis) ………… - 27 - 2.3.7 傅立葉轉換紅外線光譜 (FT-IR) ………………….. - 27 – 2.3.8 X 光吸收光譜(XAS)..………………………………… - 27 - 2.4 亞甲基藍光脫色反應 ….……..…………..…………… - 28 - 第三章結果與討論 ……………………..………………….. - 32 - 3.1 氧化鈦奈米管Dnt ……………...……………………… - 32 - 3.2 氧化鈦奈米管Dnt 的相轉換 ……………….......... - 38 - 3.2.1 硝酸濃度的影響 ……………………………………… - 38 - 3.2.2 酸源的影響 …………………………………………… - 49 - 3.2.3 酸處理時間的影響 …………………………………… - 52 - 3.2.4 酸處理溫度的影響 …………………………………… - 54 - 3.2.5 相轉換機制的討論………………...………………… - 61 - 3.3 氧化鈦奈米管Jnt 的相轉換 ………………………….. - 64 - 3.4 氧化鈦奈米棒Tnr 的相轉換…………………………... - 67 - 3.5 亞甲基藍脫色反應測試結果 ………………………….. - 71 - 第四章結論 …………………………………………………. - 81 – 第五章未來展望與建議……………………………………… - 82 – 參考文獻 …………………………………………………….. - 83 - 附錄A Dnt 的特性分析……….…………………… ……... - 87 - 附錄B JCPDS-TiO2 及sodium titanate 之XRD 標準圖譜… - 93 -
dc.language.iso	zh-TW
dc.subject	相轉換	zh_TW
dc.subject	氧化鈦奈米管	zh_TW
dc.subject	二氧化鈦光觸媒	zh_TW
dc.subject	酸處理	zh_TW
dc.subject	氧化鈦奈米棒	zh_TW
dc.subject	acid treament	en
dc.subject	phase transformation	en
dc.subject	titania nanorod	en
dc.subject	titania nanotube	en
dc.subject	titanium dioxde photocatalyst	en
dc.title	以氧化鈦奈米管製備混相二氧化鈦光觸媒	zh_TW
dc.title	Preparation of Mixed-phase Titanium Dioxide Photocatalysts from Titania Nanotube	en
dc.type	Thesis
dc.date.schoolyear	94-2
dc.description.degree	碩士
dc.contributor.oralexamcommittee	鄭淑芬,楊思明
dc.subject.keyword	氧化鈦奈米管,氧化鈦奈米棒,相轉換,酸處理,二氧化鈦光觸媒,	zh_TW
dc.subject.keyword	titania nanotube,titania nanorod,phase transformation,acid treament,titanium dioxde photocatalyst,	en
dc.relation.page	93
dc.rights.note	有償授權
dc.date.accepted	2006-07-25
dc.contributor.author-college	理學院	zh_TW
dc.contributor.author-dept	化學研究所	zh_TW
顯示於系所單位：	化學系

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