Articles - Synthesis of SrFe12O19 and Sr7Fe10O22 systems for visible light photocatalytic studies
- Rekha Doma, Pramod H. Borse a,*, C. R. Chob, J. S. Leec, S. M. Yud, J. H. Yoond, T. E. Hongd, E. D. Jeongd and H. G. Kimd,*
- a Solar H2 PEC Lab, International Advanced Research Center for Powder Metallurgy and New Materials (ARC International), Balapur PO, Hyderabad, AP, 500-005, India b College of Nanoscience and Nanotechnology, Pusan National University, Busan 609-735, Korea c Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea d Busan Center, Korea Basic Science Institute, Busan 609-735, Korea
Abstract
Solid state synthesis of two Sr-Fe-O systems viz. Sr7Fe10O22 and SrFe12O19 was attempted and they were investigated for their photocatalytic properties. Although, both the systems exhibited good cystallinity and optical properties, only Sr7Fe10O22 was found to be active for the photocatalytic decomposition of iso-propanol under visible light. It also yielded a significant quantum yield (~1.7%) for photo-reduction of water under visible light irradiation, much better than titanium oxy-nitride samples. The inactiveness of SrFe12O19 was due to its unsuitable band energetics. The Sr7Fe10O22 acted more efficiently than TiO2-xNx due to its suitable band positions and high visible light photon absorptivity.
Keywords: Strontium ferrite, Photocatalyst, Method, Visible light, Photocatalytic activity
This Article
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