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An Efficient and Recyclable Urchin-Like Yolk–Shell Fe3O4@SiO2@Co3O4 Catalyst for Photocatalytic Water Oxidation

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Abstract

In this work, an urchin-like yolk–shell Fe3O4@SiO2@Co3O4 catalyst with a diameter of 300 nm has been synthesized for photocatalytic water oxidation to oxygen with excellent activity and recyclability in the Ru(bpy) 2+3 –S2O8 2− system. In order to compare under identical conditions, we introduced Co3O4 nanoparticles with a diameter of 80 nm as a reference catalyst, the O2 yield of Fe3O4@SiO2@Co3O4 (93 μmol) is 2.7 times higher as compared with it after 60 min of photoirradiation. Magnetic properties of Fe3O4 nanoparticles are helpful to recover the catalyst from the solutions after reaction by magnetic separation. In addition, the amount of evolved oxygen reaches 87 % of initial yield for the third run. We believe that urchin-like Fe3O4@SiO2@Co3O4 has broad prospects for photocatalytic water oxidation.

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Acknowledgments

The support of Sichuan Province through a Key Technologies Research and Development Program of Sichuan Province (2011 gz0110) is acknowledged.

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Correspondence to Yadong Yao.

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Meng Wang and Niandong Wei have contributed equally to this work.

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Wang, M., Wei, N., Fu, W. et al. An Efficient and Recyclable Urchin-Like Yolk–Shell Fe3O4@SiO2@Co3O4 Catalyst for Photocatalytic Water Oxidation. Catal Lett 145, 1067–1071 (2015). https://doi.org/10.1007/s10562-015-1501-z

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  • DOI: https://doi.org/10.1007/s10562-015-1501-z

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