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Synthesis mechanism, enhanced visible-light-photocatalytic properties, and photogenerated hydroxyl radicals of PS@CdS core–shell nanohybrids

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Abstract

In this study, spherical polystyrene (PS)@CdS core–shell structure nanoparticles (CSNPs) were prepared by sonochemical method. The influences of the surfactant PVP, the order of adding precursors, the molar ratio of S/Cd, and the reaction time on structure were carefully studied. Results of SEM, TEM, EDS, XRD, and FT-IR showed that the as-prepared nanohybrids have a typical core–shell structure with 260 nm core and a uniform shell with thickness ranging from 10 to 30 nm, both PVP and the order of adding precursors were the controlling parameters. In addition, the as-synthesized PS@CdS CSNPs exhibited much higher photocatalytic activity for RhB under visible light irradiation compared with pure CdS, which should be attributed to their synergic effect between core and shell, amount of hydroxyl groups on the surface, good monodispersity, and so on. Besides, the production of photogenerated hydroxyl radical (•OH) was in accordance with the RhB decolorization efficiency from the prepared PS@CdS CSNPs. It indicated that •OH was the main active oxygen species in the photocatalytic process.

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Acknowledgments

This work is financially supported by the National Natural Science Foundation of China (Grant No. 21176260 and 21376268), Taishan Scholar Foundation (No. ts20130929) and the National Basic Research Program of China (No. 2011CB605703).

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Authors and Affiliations

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, Shandong, People’s Republic of China

    Han Wang, Qian Xu, Jingtang Zheng, Bo Jiang, Qinzhong Xue & Mingbo Wu

  2. Baotou Light Industry and Vocational Technical College, Baotou, 014045, People’s Republic of China

    Han Wang & Wenqing Han

  3. Beijing ZNHK Science and Technology Development Co., LTD, Beijing, 100080, People’s Republic of China

    Xing Zheng

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  1. Han Wang
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  2. Qian Xu
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Correspondence to Han Wang.

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Wang, H., Xu, Q., Zheng, X. et al. Synthesis mechanism, enhanced visible-light-photocatalytic properties, and photogenerated hydroxyl radicals of PS@CdS core–shell nanohybrids. J Nanopart Res 16, 2794 (2014). https://doi.org/10.1007/s11051-014-2794-3

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