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      Magnetic composite BiOCl–SrFe12O19: a novel p–n type heterojunction with enhanced photocatalytic activity

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          Abstract

          The magnetic composite BiOCl-SrFe12O19, a novel p-n type heterojunction was synthesized by hydrolysis with a medium temperature sintering method. The microstructure and magnetic properties of the prepared material were characterized by FTIR, XRD, SEM, TEM, HRTEM, SAED, and VSM. The results showed the [001] facet of BiOCl with high photocatalytic activity was exposed in the BiOCl-SrFe12O19. The heterostructured BiOCl-SrFe12O19 had better magnetic properties, contributing to its reuse and improvement in photocatalysis. Moreover, the composite was blessed with excellent photocatalytic activity and stability. In the BiOCl-SrFe12O19 system, SrFe12O19 not only inhibited the growth of BiOCl along the [001] direction to enhance the exposure of the [001] wafer, but also acted as a sensitizer absorbing light irradiation. The magnetic field generated from SrFe12O19 made BiOCl, under light irradiation, produce more photo-induced electrons and holes and simultaneously hampered their recombination. For the first time we propose the possible mechanism of how to enhance photocatalytic activity by a magnetic field effect originating from the magnetic photocatalyst itself.

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                Author and article information

                Journal
                ICHBD9
                Dalton Trans.
                Dalton Trans.
                Royal Society of Chemistry (RSC)
                1477-9226
                1477-9234
                2014
                2014
                : 43
                : 5
                : 2211-2220
                Article
                10.1039/C3DT52219A
                24297101
                © 2014
                Product
                Self URI (article page): http://xlink.rsc.org/?DOI=C3DT52219A

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