repository
Texture & Heterostructure Engineering of Bismuth vanadate for Enhanced Photoelectrochemical Water-splitting
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 조인선 | - |
| dc.contributor.author | 정유재 | - |
| dc.date.accessioned | 2022-11-29T03:01:34Z | - |
| dc.date.available | 2022-11-29T03:01:34Z | - |
| dc.date.issued | 2022-08 | - |
| dc.identifier.other | 32141 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/21317 | - |
| dc.description | 학위논문(석사)--아주대학교 일반대학원 :에너지시스템학과,2022. 8 | - |
| dc.description.abstract | 단일 기판위에 서로다른 재료를 결합하는 이종접합 공학은 광전기화학 물분해 (Photoelectrochemical water splitting : PEC)를 위한 광전극의 광학적,전기적, 및 전기화학적 특성을 개선할 수 있다. 본 논문에서는 광전기화학 (PEC) 물분해를 위한 광음극으로서 새로운 이중 배향된 BiVO4/Sb:SnO2 이종접합 구조를 성공적으로 합성하였다. 먼저 수열합성법을 통해 불소가 도핑된 산화주석 기판 (FTO)위에 [001] 방향으로 우선 배향된 안티모니 도핑된 산화주석 나노로드 (ATO NRs)를 먼저 성장시켰다. 이어서, 스핀코팅을 통해 BiVO4(BVO) 시드층을 ATO NRs위에 코팅한 후, 2차 수열합성을 통해 이중 배향된 BVO/ATO 이종접합을 합성하였다. 이중배향 이종접합구조 (Dual-textured BVO/ATO heterostructure:dt-BAH)는 [001] 배향의 단결정 ATO NRs와 (001) 배향된 BVO로 구성되어 있으며 정렬된 계면을 가진다. 또한 배향된 BVO의 경우 표면에 (001)과 (101)의 두 가지 다른 면을 가지고 있다. 이렇게 합성된 dt-BAH는 전하 수집능력이 크게 향상되어 무작위로 배향된 ATO nanoparticles 필름에서 성장한 배향된 BVO보다 약 4배 향상된 광전류 밀도를 나타내었다. 본 연구의 결과는 효율적인 광전극 개발을 위한 이종접합 구조 설계에 대한 새로운 관점을 제공하며, 다양한 에너지 분야에도 적용이 가능할 것을 보여주었다. | - |
| dc.description.tableofcontents | 1 Introduction 1 1.1 Photoelectrochemical (PEC) water splitting 1 1.2 Strategies to improve PEC performance 1 1.2.1 Heterostructure engineering 1 1.2.2 Texture engineering 2 1.3 The aim of this thesis 2 2 Experimental 3 2.1 Materials synthesis 3 2.1.1 Synthesis of Sb:SnO2 nanorods & nanoparticles films 3 2.1.2 Textured BiVO4 4 2.1.3 Cobalt/Iron Oxygen evolution electrocatalyst (OEC) 5 2.2 Materials characterization 5 2.3 (Photo)electrochemical measurement 6 2.4 Gas chromatography (GC) measurements 8 3 Results and Discussion 9 3.1 Synthesis of dual-textured BiVO4/Sb:SnO2 heterostructure 9 3.2 Optical properties and PEC performances 23 3.3 Further improvement of PEC performances 35 4 Conclusion 45 5 Reference 46 6 국문요약 53 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | Texture & Heterostructure Engineering of Bismuth vanadate for Enhanced Photoelectrochemical Water-splitting | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.department | 일반대학원 에너지시스템학과 | - |
| dc.date.awarded | 2022. 8 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 1254248 | - |
| dc.identifier.uci | I804:41038-000000032141 | - |
| dc.identifier.url | https://dcoll.ajou.ac.kr/dcollection/common/orgView/000000032141 | - |
| dc.subject.keyword | Bismuth vanadate | - |
| dc.subject.keyword | charge collection | - |
| dc.subject.keyword | dual-textured | - |
| dc.subject.keyword | heterostructure | - |
| dc.subject.keyword | photoelectrochemical water splitting | - |
| dc.description.alternativeAbstract | Heterostructure engineering, combining dissimilar materials into a single substrate, allows the alteration of the optical, electrical, and electrochemical properties of photoelectrodes for photoelectrochemical (PEC) water splitting. Herein, we successfully synthesized a novel dual-textured BiVO4 / Sb:SnO2 heterostructure as a photoanode for PEC water-splitting devices. Sb:SnO2 (ATO) nanorods (NRs) with a [001] growth orientation were first grown on a fluorine-doped tin oxide substrate by a hydrothermal method. Subsequently, the BiVO4 (BVO) seed layer was deposited on the ATO NRs using a solution spin-coating followed by a second hydrothermal growth to synthesize the dual-textured BVO/ATO heterostructure (dt-BAH). The resultant dt-BAH photoanode was composed of (001)-textured BVO on the [001]-oriented single-crystalline ATO NRs, and their interface exhibited intimate junctions. In addition, the textured BVO exhibited two different facets of (001) and (101). Notably, the synthesized dt-BAH photoanode showed a considerable enhancement in charge collection performance, resulting in a photocurrent density approximately four times higher than that of the textured BVO grown on the randomly oriented ATO nanoparticle film (single-textured BAH). Our results provide new insights into heterostructure design for the development of efficient photoelectrodes. | - |
- Appears in Collections:
- Graduate School of Ajou University > Department of Energy Systems > 3. Theses(Master)
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
-
- License
- STATISTICS
- Total Visit :3,720,644
- Total Download :1,818
- Today View :3,847
