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Preparation and optical properties of TiO2−x N x /Ni0.5Zn0.5Fe2O4 core–shell nanocatalyst from sol–gel-hydrothermal process

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Abstract

A nitrogen doped TiO2/Ni0.5Zn0.5Fe2O4 core–shell structure nanoparticles was prepared by low temperature sol–gel-hydrothermal process. The characterizations of the catalyst indicate that the Ni0.5Zn0.5Fe2O4 nanocrystals of about 25 nm are well-coated with crystalline N-doped titania. The absorption edges in the diffusion reflectance spectra of TiO0.98N1.02 and TiO1.37N0.63/Ni0.5Zn0.5Fe2O4 shift to visible light region. The core–shell nanocatalysts can effectively photodegrade organic pollutants in the dispersion system and can be recycled easily by an external magnetic field.

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Acknowledgments

We are grateful to the financial supports from the National Natural Science Foundation of China (No. 40830748), the fund of China ‘211’ engineering construction and the open foundation from key laboratory of catalysis and materials science of Hubei in China.

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Correspondence to Xiang Shen.

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Shen, X., Wang, Y.X., Lu, L.Q. et al. Preparation and optical properties of TiO2−x N x /Ni0.5Zn0.5Fe2O4 core–shell nanocatalyst from sol–gel-hydrothermal process. J Sol-Gel Sci Technol 54, 340–346 (2010). https://doi.org/10.1007/s10971-010-2201-1

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