Porous ZnO-ZnSe nanocomposites for visible light photocatalysis
SCIE
SCOPUS
- Title
- Porous ZnO-ZnSe nanocomposites for visible light photocatalysis
- Authors
- Seungho Cho; Ji-Wook Jang; Lee, JS; Lee, KH
- Date Issued
- 2012-03
- Publisher
- The Royal Society of Chemistry
- Abstract
- We report the synthesis of porous ZnO-ZnSe nanocomposites for use in visible light photocatalysis. Porous ZnO nanostructures were synthesized by a microwave-assisted hydrothermal reaction then converted into porous ZnO-ZnSe nanocomposites by a microwave-assisted dissolution-recrystallization process using an aqueous solution containing selenium ions. ZnO and ZnSe nanocrystallites of the nanocomposites were well-mixed (rather than forming simple core-shell (ZnO-ZnSe) structures), particularly, in the outer regions. Both ZnO and ZnSe were present at the surface and exposed to the environment. The porous ZnO-ZnSe nanocomposites showed absorption bands in the visible region as well as in the UV region. The porous ZnO-ZnSe nanocomposites had much higher activities than the porous ZnO nanostructures. Control experiments using cutoff filters revealed that the main photocatalytic activity of the synthesized nanostructures arose from photo-excitation of the semiconductor (ZnO or ZnSe) via absorption of light of an energy equal to or exceeding the band gap energy.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16504
- DOI
- 10.1039/C2NR11869F
- ISSN
- 2040-3364
- Article Type
- Article
- Citation
- Nanoscale, vol. 4, no. 6, page. 2066 - 2071, 2012-03
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