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Magnetic yolk-shell structured anatase-based microspheres were fabricated through successive and facile sol-gel coating on magnetite particles, followed by annealing treatments. Upon loading with gold nanoparticles, the obtained functional magnetic microspheres as heterogeneous catalysts showed superior performance in catalyzing the epoxidation of styrene with extraordinary high conversion (89.5%) and selectivity (90.8%) towards styrene oxide. It is believed that the construction process of these fascinating materials features many implications for creating other functional nanocomposites.

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Publication history

Received: 15 September 2014
Revised: 10 November 2014
Accepted: 19 November 2014
Published: 23 December 2014
Issue date: January 2015

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© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

This work was supported by the National Basic Research Program of China (973 Program) (Nos. 2013CB934104 and 2012CB224805), the National Natural Science Foundation of China (Nos. 51372041 and 51422202), the specialized research fund for the doctoral program of higher education of China (No. 20120071110007), the innovation program of Shanghai Municipal Education Commission (No. 13ZZ004), State Key Laboratory of Pollution Control and Resource Reuse Foundation (No. PCRRF14017), and the Program for New Century Excellent Talents in University (No. NCET-12-0123). We extend our appreciation to the Deanship of Scientific Research at King Saud University for funding the work through the research group project No. RGP-227.

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Email: nanores@tup.tsinghua.edu.cn

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