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A novel magnetically separable visible-light-photocatalyst,magnetite/N-doped carboxylate-rich carbon spheres(N-MCRCSs),was synthesized by a facile ultrasonic method using the magnetite/carboxylaterich carbon spheres(MCRCSs) as precursors.N element has been successfully doped into the MCRCSs in a HNO_3 aqueous solution via an ultrasonic treatment,which were demonstrated by the FT-IR and XPS.NMCRCSs exhibit more intensive absorption over MCRCSs in the entire UV and visible region.N-MCRCSs can not only be easily recycled by applying an external magnetic field,but also exhibit powerful visible light photocatalytic activity.
A novel magnetically separable visible-light-photocatalyst, magnetite / N-doped carboxylate-rich carbon spheres (N-MCRCSs), was synthesized by a facile ultrasonic method using the magnetite / carboxylaterich carbon spheres (MCRCSs) as precursors. successfully doped into the MCRCSs in a HNO_3 aqueous solution via an ultrasonic treatment, which were demonstrated by the FT-IR and XPS. NMCRCSs exhibit more intensive absorption over MCRCSs in the entire UV and visible region. N-MCRCSs can not only be recovered by applying an external magnetic field, but also exhibit powerful visible light photocatalytic activity.