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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | Paravee Vas-Umnuay | zh_TW |
| dc.contributor.advisor | Paravee Vas-Umnuay | en |
| dc.contributor.author | 幸雪晴 | zh_TW |
| dc.contributor.author | Nutzeya Plainoen | en |
| dc.date.accessioned | 2024-01-26T16:22:11Z | - |
| dc.date.available | 2024-01-27 | - |
| dc.date.copyright | 2024-01-26 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2024-01-10 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91407 | - |
| dc.description.abstract | 溴化銫鉛鈣鈦礦（CsPbBr3）具有出色的光電性能，因此在太陽能電池、光電探測器、發光二極管和水分解等領域中被廣泛應用。此外，CsPbBr3作為光催化劑，在陽光下降解有機化合物方面展現出巨大潛力。在CsPbBr3的合成過程中，還會生成Cs4PbBr6（CsPbBr3的另一種形式），它具有理想的性能：如強而窄的光致發光（PL）和增強的熱穩定性。本研究使用簡單的沉澱方法成功地合成了CsPbBr3/Cs4PbBr6奈米粒子的混合物，並研究了真空下的反應和乾燥溫度對其影響。然而在高溫、高濕度和高氧氣含量會造成CsPbBr3/Cs4PbBr6材料不穩定，並連帶影響其光催化降解性能。為了提高穩定性和活性，我們採用了一種稱為一步水觸發轉化法的高效技術。該創新方法使用二氧化鈦（TiO2）保護層封裝CsPbBr3/Cs4PbBr6奈米粒子，從而形成鈣鈦礦與金屬氧化物的複合材料。這種複合材料能有效促進電荷轉移和分離，對於成功的光催化過程發揮至關重要的作用。
為了獲得最佳結果，我們改變了反應溫度（95、110、125和140°C）、乾燥條件（80°C 2小時、80°C過夜、室溫過夜）以及CsPbBr3/Cs4PbBr6與鈦酸四丁酯的質量比（1:1、1:2、1:3和1:4）。結果顯示，在95°C的反應溫度和80°C的乾燥條件下，使用TiO2封裝的CsPbBr3/Cs4PbBr6的穩定性顯著增強。此外，當CsPbBr3/Cs4PbBr6與鈦酸四丁酯的質量比為1:3時，材料展現出最大表面積222 m2/g，伴有最高的吸收和降解活性，同時動力學速率常數k = 0.1053 min-1，並在30分鐘內完全光催化降解羅丹明B。 | zh_TW |
| dc.description.abstract | Due to the excellent optoelectronic performance of cesium lead bromide perovskite (CsPbBr3), it has found wide-ranging applications in solar cells, photodetectors, light-emitting diodes, and water splitting. Additionally, CsPbBr3 has shown promising potential as a photocatalyst for the degradation of organic compounds under sunlight. During the synthesis of CsPbBr3, Cs4PbBr6, another formation of CsPbBr3, is also produced, which exhibits desirable properties such as strong and narrow photoluminescence (PL) and enhanced thermal stability. In this study, we successfully synthesized a mixture of CsPbBr3/Cs4PbBr6 nanoparticles using a simple precipitation method and investigated the influence of reaction and drying temperatures under vacuum. However, the stability of CsPbBr3/Cs4PbBr6 was found to be sensitive to high temperatures, moisture, and oxygen, which could affect its photocatalytic degradation performance. To enhance both stability and activity, we employed a highly effective technique called the one-step water-triggered transformation method. This innovative approach involved encapsulating CsPbBr3/Cs4PbBr6 nanoparticles with a protective layer of titanium dioxide (TiO2), creating a perovskite/metal-oxide composite. This composite plays a crucial role in facilitating efficient charge transfer and separation, which are essential for successful photocatalytic processes. To achieve optimal results, we varied the reaction temperatures (95, 110, 125, and 140°C), drying conditions (80°C for 2 h, 80°C overnight, and at room temperature overnight), and mass ratio between CsPbBr3/ Cs4PbBr6 to tetrabutyl titanate (1:1, 1:2, 1:3, and 1:4). The results demonstrated that the stability of TiO2-encapsulated CsPbBr3/ Cs4PbBr6 could be significantly enhanced by undergoing a reaction temperature of 95 °C and drying condition at 80 °C for 2 h. Moreover, when the mass ratio between CsPbBr3/Cs4PbBr6 was set at 1:3, the material exhibited a maximum surface area of 222 m2/g, resulting in the highest absorption and degradation activity. The kinetic rate constant was determined to be k = 0.1053 min-1, enabling complete photocatalytic degradation of Rhodamine B within 30 min. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-01-26T16:22:11Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-01-26T16:22:11Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | Acknowledgement i
Abstract ii 摘要 iv Content v List of Table vi List of Figures viii Chapter 1 Introduction 1 1.1 Background 1 1.2 Research objectives 3 1.3 Research scope 3 Chapter 2 Literature review 5 2.1 Advance Oxidation Process 5 2.2 Sun spectrum 10 2.3 CsPbBr3 11 2.4 CsPbBr3 /Cs4PbBr6 Synthesis 13 2.5 Increasing the stability of CsPbBr3 /Cs4PbBr6 16 2.6 Heterojunctions 17 2.7 Kinetic data 19 Chapter 3 Methodology 21 3.1 Preparation of CsPbBr3 nanoparticles 21 3.2 Preparation of CsPbBr3 nanoparticles encapsulate by TiO2 22 3.3 Photocatalyst test 23 3.4 Photocatalyst characterizations 23 Chapter 4 Results and Discussion 29 4.1 The effect of temperature 29 4.2 The effect of ratio between CsPbBr3/Cs4PbBr6 to TBOT 35 4.3 Degradation of Rhodamine B 44 Chapter 5 Conclusion and Future work 50 5.1 Conclusion 50 5.2 Future work 51 Reference 53 Appendix A Raw data 63 A.1 The degradation activity of Rhodamine B of pure CsPbBr3/Cs4PbBr6 63 A.2 The degradation activity of Rhodamine B of CsPbBr3/Cs4PbBr6 and TiO2 63 A.3 The degradation activity of Rhodamine B of P25 68 Appendix B Characteristics of catalysts 69 VITA 72 | - |
| dc.language.iso | en | - |
| dc.subject | CsPbBr3 | zh_TW |
| dc.subject | TiO2 | zh_TW |
| dc.subject | 穩定性 | zh_TW |
| dc.subject | 光觸媒 | zh_TW |
| dc.subject | 光催化降解 | zh_TW |
| dc.subject | Stability | en |
| dc.subject | Photocatalyst | en |
| dc.subject | CsPbBr3 | en |
| dc.subject | TiO2 | en |
| dc.subject | Photocatalytic Degradation | en |
| dc.title | 二氧化鈦包覆的CsPbBr3/Cs4PbBr6對Rhodamine B光催化降解之活性與穩定性研究 | zh_TW |
| dc.title | Activity and Stability of TiO2-Encapsulated CsPbBr3/Cs4PbBr6 for Photocatalytic Degradation of Rhodamine B | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-1 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.coadvisor | 吳紀聖 | zh_TW |
| dc.contributor.coadvisor | Chi-Sheng Wu | en |
| dc.contributor.oralexamcommittee | Kasidit Nootong ;Akawat Sirisuk;Tanyakorn Muangnapoh | zh_TW |
| dc.contributor.oralexamcommittee | Kasidit Nootong ;Akawat Sirisuk;Tanyakorn Muangnapoh | en |
| dc.subject.keyword | 光觸媒,光催化降解,CsPbBr3,TiO2,穩定性, | zh_TW |
| dc.subject.keyword | Photocatalyst,CsPbBr3,TiO2,Photocatalytic Degradation,Stability, | en |
| dc.relation.page | 72 | - |
| dc.identifier.doi | 10.6342/NTU202400057 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2024-01-11 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 化學工程學系 | - |
| 顯示於系所單位： | 化學工程學系 | |
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