Heterostructure of Zinc Oxide Nanowire and Palladium Nanoparticle using Atomic Layer deposition for Enhanced Photocatalytic performance
광촉매반응 향상을 위해 ALD를 이용해 만든 ZnO와 Pd나노입자의 이형접합체와 그 성능 분석
- 주제(키워드) Photocatalyst , ZnO Nanowire , Palladium
- 발행기관 고려대학교 대학원
- 지도교수 박희등
- 발행년도 2020
- 학위수여년월 2020. 2
- 학위구분 석사
- 학과 대학원 건축사회환경공학과
- 세부전공 물과 환경
- 원문페이지 52 p
- UCI I804:11009-000000126919
- DOI 10.23186/korea.000000126919.11009.0000951
- 본문언어 영어
- 제출원본 000046024954
초록/요약
To improve the performance of the catalyst, heterocatalysis, which is conjugate of two different materials, has received much attention in various fields. Especially in the case of photocatalysts, due to the limited intensity of natural light sources, it is necessary to improve the performance of the catalyst itself. Here, we fabricated zinc oxide, a representative photocatalyst material, into nanowire form with a large surface area to improve the performance of the photocatalysts, and deposited palladium nanoparticles on the surface for breakthrough of the catalytic performance. Atomic layer deposition (ALD) was used to deposit palladium nanoparticles equally on the surface of nanowire which has complex nanosized-shaped structure. In order to evaluate the performance of the heterostructured photocatalyst, decomposing rates of organic material were measured when the photocatalyst in the water generates reactive oxygen species which decompose organic matters. As a result, zinc oxide nanowires (ZnO NW) showed significantly higher performance than previous zinc oxide photocatalysts such as ZnO nanoparticles, ZnO nanopowders, and ZnO thin films which were deposited by atomic layer deposition. Moreover, palladium nanoparticles deposited on the surface of ZnO NW dramatically improved the release of reactive oxygen species which leads higher decomposition rate of 4-chlorophenol, a model organic matter in water, from 42.5% to 62.8%.
more목차
1. Introduction 1
2. Materials and Methods 08
3. Results and Discussion 17
3.1 Structural characteristics of ZnO nanowire and Palladium doped ZnO nanowire 17
3.2 Photocatalytic performance analysis 29
3.3 Mechanism for photocatalytic activity enhancement 31
3.4 Iteration test of photocatalytic activity of Palladium doped ZnO nanowire 34
4. Conclusions 37
5. References 39
