Photocatalytic Hydrogen Generation from Water-methanol Mixtures Using Nanocrystalline ZnFe2O4 under Visible Light Irradiation
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- Title
- Photocatalytic Hydrogen Generation from Water-methanol Mixtures Using Nanocrystalline ZnFe2O4 under Visible Light Irradiation
- Authors
- Borse, PH; Jang, JS; Hong, SJ; Lee, JS; Jung, JH; Hong, TE; Ahn, CW; Jeong, ED; Hong, KS; Yoon, JH; Kim, HG
- Date Issued
- 2009-10
- Publisher
- KOREAN PHYSICAL SOC
- Abstract
- A spinel crystal structure of ferrite containing zinc (ZnFe2O4) was synthesized by using the polymer complex method. A pure phase ZnFe2O4 was obtained at a relatively lower temperature of 900 degrees C. The as-synthesized nanoparticles are agglomerates of crystals with an average size of similar to 50 urn, as estimated from the X-ray diffraction analysis. The band gap of the n-type semiconducting metal oxide, as determined by using an ultraviolet-visible diffuse reflectance spectrometer was found to be 1.90 eV (653 nm). The photocatalytic activity of ZnFe2O4 was investigated by using the photoreduction of water under visible light (>= 420 nm), which was found to be much higher than that of the well-known TiO2-x,N-x photocatalyst. This superior performance is attributed to the larger surface area, the uniform and well-dispersed deposition of the Pt co-catalyst over the surface, and the small band gap of the chemically-prepared ferrite photocatalyst.
- Keywords
- Zinc ferrites; Nano-particles; Polymerized complex method; Visible light; POLYMERIZED COMPLEX METHOD; OXIDATION; TIO2; NM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26299
- DOI
- 10.3938/JKPS.55.1472
- ISSN
- 0374-4884
- Article Type
- Article
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 55, no. 4, page. 1472 - 1477, 2009-10
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