Journal
LANGMUIR
Volume 27, Issue 16, Pages 10243-10250Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la201755w
Keywords
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Funding
- Ministry of Education of Korea
- Korean government (MEST) [2011-0000360]
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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.
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