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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 薛承輝(Chun-Hway Hsueh) | |
dc.contributor.author | Ying Liu | en |
dc.contributor.author | 劉穎 | zh_TW |
dc.date.accessioned | 2021-06-08T03:39:28Z | - |
dc.date.copyright | 2019-07-17 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2019-07-09 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21604 | - |
dc.description.abstract | 目前藉由半導體氧化物照光來進行分解水之光電化學反應的相關研究正廣泛的進行中,而增進半導體光電極之光電轉換效率的方式有很多,例如元素參雜、形成異質結構、亦或是貴金屬奈米結構的修飾等。其中利用貴金屬奈米結構的表面電漿共振效應來提升半導體光電化學性質的發展具有相當大的潛力,但是大部分的文獻主要都著墨於貴金屬奈米顆粒的修飾所帶來的影響,而少有其他形貌之貴金屬於相關應用的探討。本實驗提供了一個簡單的製程手法在氧化鎢的光陽極上修飾金奈米板,並且提升了其光電轉換的效果。首先用水熱法在FTO玻璃上生長氧化鎢之板狀結構來做為水分解反應的光陽極,接著再將其浸泡於事先合成好的金奈米板溶液中來進行修飾。在掃描式電子顯微鏡(SEM)的影像中可以發現在適當的浸泡時間下金奈米板可以均勻的分布在氧化鎢表面,並且在光電化學反應後依然擁有良好的附著性。從線性掃瞄伏安法(LSV)中可以發現,跟未經修飾的氧化鎢相比,在0.5 M Na2SO4、1 V vs Ag/AgCl的條件下金/氧化鎢的複合結構在AM 1.5G模擬太陽光的照射中具有更高的光電流。透過紫外光-可見光光譜可以得知這個光電化學表現的增益來自於金奈米板透過表面電漿共振效應延伸氧化鎢的光吸收來到可見光波段、而電化學阻抗頻譜的量測也證實了金奈米板的修飾能夠改善氧化鎢電極和電解液之間的電荷傳遞。透過這項研究,我們藉由電化學和其他分析技術建立了金奈米板之修飾與氧化鎢光電化學效能間的關係。 | zh_TW |
dc.description.abstract | In the present work, we improved the photoelectrochemical (PEC) performance of tungsten trioxide (WO3) photoanode by decorating WO3 film with Au nanoplates. WO3 films were fabricated on FTO-coated glass by hydrothermal treatment and Au nanoplates were incorporated by immersing the substrates in Au nanoplates solution under different periods of time. Our study revealed that compared with pristine WO3, the Au-WO3 nanocomposite performed enhanced photocurrent density under irradiation of AM 1.5G simulated sunlight. This improved PEC performance was benefited from the extension of light absorption resulting from the surface plasmon resonance effect of the Au nanoplates at about 650 nm wavelength, which was verified by UV-vis absorption spectra. The incident photon-to-current conversion efficiency measurements revealed that photoactivity was improved after decoration of Au nanoplates on WO3. This study provided a facile method to decorate Au nanoplates on WO3 photoanodes with enhanced performance for solar energy conversion. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T03:39:28Z (GMT). No. of bitstreams: 1 ntu-107-R05527006-1.pdf: 4028307 bytes, checksum: 1ba0a561a0624b03e44e03bd2035600d (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | Acknowledgement i
中文摘要 ii ABSTRACT iii CONTENTS iv LIST OF FIGURES vi LIST OF TABLES viii Chapter 1 Introduction 1 1.1 Motivations 1 1.2 Objectives 2 Chapter 2 Literature Review 3 2.1 Photoelectrochemical (PEC) water splitting 3 2.1.1 Principle of PEC water splitting 3 2.1.2 Strategies for improving PEC performance of photoelectrodes 5 2.2 Tungsten trioxide (WO3) 8 2.2.1 Fundamental properties of WO3 9 2.2.2 Methods of synthesizing WO3 photoanode 10 2.3 Plasmonic nanostructures in water splitting application 12 2.3.1 Principle of surface plasmon resonance (SPR) effect 12 2.3.2 Optical, electronic, and catalytic effects of metal nanostructures 19 Chapter 3 Experimental Procedures 22 3.1 Synthesis of WO3 plates on FTO coated glass 22 3.2 Decoration of Au nanoplates on WO3 23 3.3 Characterizations 24 3.4 PEC measurements 24 Chapter 4 Results and Discussion 26 4.1 Microstructure analysis 26 4.2 XPS analysis 28 4.3 Phase examination 30 4.4 UV-vis spectroscopy measurement 31 4.5 PEC properties characterization 33 4.6 Mechanisms of photoactivity enhancement 41 Chapter 5 Conclusion 44 | |
dc.language.iso | en | |
dc.title | 金奈米板修飾之氧化鎢於光電化學水分解之應用 | zh_TW |
dc.title | Fabrication of WO3 photoanode decorated with Au nanoplates and its applications in photoelectrochemical water splitting | en |
dc.type | Thesis | |
dc.date.schoolyear | 107-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 謝宗霖(Jay Shieh),羅世強(Shyh-Chyang Luo) | |
dc.subject.keyword | 光電化學,水分解,氧化鎢,表面電漿共振, | zh_TW |
dc.subject.keyword | Photoelectrochemistry,Water splitting,WO3,Surface plasmon resonance, | en |
dc.relation.page | 55 | |
dc.identifier.doi | 10.6342/NTU201901349 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2019-07-10 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
顯示於系所單位: | 材料科學與工程學系 |
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