Three-Dimensional Type II ZnO/ZnSe Heterostructures and Their Visible Light Photocatalytic Activities
SCIE
SCOPUS
- Title
- Three-Dimensional Type II ZnO/ZnSe Heterostructures and Their Visible Light Photocatalytic Activities
- Authors
- Cho, S; Jang, JW; Kim, J; Lee, JS; Choi, W; Lee, KH
- Date Issued
- 2011-08-16
- Publisher
- AMER CHEMICAL SOC
- Abstract
- We report a method for synthesizing three distinct type H 3D ZnO/ZnSe heterostructures through simple solution-based surface modification reactions in which polycrystalline ZnSe nanoparticles formed on the surfaces of single-crystalline ZnO building blocks of 3D superstructures. The experimental results suggested a possible formation mechanism for these heterostructures. The formation of the ZnO/ZnSe heterostnictures was assumed to result from a dissolution recrystallization mechanism. The optical properties of the 3D ZnO/ZnSe heterostructures were probed by UV vis diffuse reflectance spectroscopy. The 3D ZnO/ZnSe heterostructures exhibited absorption in the visible spectral region. The visible photocatalytic activities of 3D ZnO/ZnSe heterostructures were much higher than those of the 3D pure ZnO structures. The activities of the 3D ZnO/ZnSe heterostnictures varied according to the structures under visible light. The morphologies and exposed crystal faces of pure ZnO building blocks prior to surface modification had a significant effect on the visible light photocatalytic processes of ZnO/ZnSe heterostructures after surface modification.
- Keywords
- ZNO NANOSTRUCTURES; NANOWIRE ARRAYS; QUANTUM DOTS; GROWTH; DEGRADATION; COMPLEX; PHOTOSENSITIZATION; SUPERSTRUCTURES; NANOPARTICLES; MICROSPHERES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/17060
- DOI
- 10.1021/LA201755W
- ISSN
- 0743-7463
- Article Type
- Article
- Citation
- LANGMUIR, vol. 27, no. 16, page. 10243 - 10250, 2011-08-16
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