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- Title
Synthesis and visible light photocatalytic activity of nanocrystalline PrFeO perovskite for hydrogen generation in ethanol-water system.
- Authors
TIJARE, S; BAKARDJIEVA, S; SUBRT, J; JOSHI, M; RAYALU, S; HISHITA, S; LABHSETWAR, NITIN
- Abstract
Nanocrystalline PrFeO perovskite type orthoferrite was synthesized at 700°C by using three different synthesis methods, namely sol-gel, template and combustion method. The synthesized materials were characterized by XRD, BET-SA, SEM, HRTEM, XPS, FTIR and UV-DRS techniques to understand their physico-chemical properties. Characterization data reveal the formation of nanocrystalline PrFeO perovskite composition with improved physical properties, possibly due to lower synthesis temperature used. PrFeO synthesized by sol-gel method consists of crystallite size of about 20 nm with absorption maxima at 595 nm wavelength in visible light range. This photocatalyst shows hydrogen generation of about 2847 μmol.g.h, under visible light irradiation in ethanol-water system. The photocatalyst was further investigated for various operational parameters such as photocatalyst dose variation, illumination intensity, time, etc. in a view to optimize the hydrogen generation as well as to understand mechanistic aspects. This material appears to follow a semiconductor type mechanism for ethanol-assisted visible light photocatalyic water-splitting and can also be an interesting candidate to develop hetero-junction type photocatalysts. [Figure not available: see fulltext.]
- Subjects
PEROVSKITE; PRASEODYMIUM; VISIBLE spectra; PHOTOCATALYSTS; CATALYTIC activity; NANOCRYSTAL synthesis; INTERSTITIAL hydrogen generation; ETHANOL; WATER
- Publication
Journal of Chemical Sciences, 2014, Vol 126, Issue 2, p517
- ISSN
0974-3626
- Publication type
Article
- DOI
10.1007/s12039-014-0596-x