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Fabrication of hierarchical hollow silica/silver/silica/titania composite particles

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Abstract

Hierarchical composite particles with hollow structure were fabricated in this work. The composite particles were composed of guest particles and host ones, which were achieved by Stöber method, and a raspberry-like morphology was produced by the “anchoring” of guest particles on the surface of host ones. Moreover, the hollow structure was obtained by template-assisted approach. The raspberry-like morphology and hollow structure of composite particles were confirmed by scanning electron microscopy and transmission electron microscopy. As multiple distinct functional components were integrated into the raspberry-like particles, the obtained composite particles exhibited enhanced photocatalytic activity under visible light irradiation. The rate of degradation of the as-prepared composite particles was ca. 13 times faster than that of pure TiO2 under visible light irradiation. Furthermore, a brief photocatalytic mechanism was presented. The composite particles, combining hierarchical morphology and hollow structure, exhibit promising potential in self-cleaning and nanoreactor areas.

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Acknowledgments

This work is supported by Shandong Province Natural Science Foundation (ZR2012EMM009 and ZR2013EMQ005), the Scientific Research Foundation for the Returned Overseas Scholars in Jinan (20100406), National Natural Science Foundations of China (51372140, 51303086, and 51172132), the Youth Scientist Funds of Shandong Province (BS2013NJ006), and Jinan Science & Technology Youth-Star Program (2013034).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Qilu University of Technology, Key Laboratory of Amorphous and Polycrystalline Materials, Key Laboratory of Processing and Testing Technology of Glass Functional Ceramics of Shandong Province, Daxue Road, Western University Science Park, Jinan, 250353, People’s Republic of China

    Chong Bai, Jin-Qiu Liu, Wei-Liang Liu, Man-Man Ren & Qin-Ze Liu

  2. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People’s Republic of China

    Xin-Qiang Wang, Xiu-Lan Duan & Yong-Zhong Wu

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  1. Chong Bai
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  2. Jin-Qiu Liu
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  3. Wei-Liang Liu
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  5. Qin-Ze Liu
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Correspondence to Wei-Liang Liu.

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Bai, C., Liu, JQ., Liu, WL. et al. Fabrication of hierarchical hollow silica/silver/silica/titania composite particles. J Sol-Gel Sci Technol 77, 565–573 (2016). https://doi.org/10.1007/s10971-015-3884-0

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  • DOI: https://doi.org/10.1007/s10971-015-3884-0

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