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Preparation of Au/TiO2 nanocomposite particles with high visible-light photocatalytic activity in inverse miniemulsions

Colloid and Polymer Science volume 293, pages 277–288 (2015)Cite this article

Abstract

Au/amorphous TiO2 nanocomposite particles with high visible-light photocatalytic activity were conveniently prepared in inverse miniemulsions. The materials were synthesized through a combination of a sol–gel process and in situ reduction of HAuCl4 by hydrazine to Au nanoparticles in the nanocomposite particles. The photocatalytic activity of the as-synthesized Au/amorphous TiO2 nanocomposite particles is much higher than that of the Au/anatase TiO2 and Au/rutile TiO2 nanocomposite particles prepared by calcination. Therefore, no further heat treatments are required to achieve visible-light photocatalytic active catalysts. The loading of Au in the nanocomposite particles could be conveniently tuned by varying the HAuCl4 loading in the dispersed phase of the inverse miniemulsions. Only a small amount of Au was required to achieve a high photocatalytic activity. The size, particle morphology, TiO2 phase, optical property, elemental content and distribution, and pore properties of the Au/TiO2 nanocomposite particles were systematically characterized by dynamic light scattering, transmission/scanning electron microscopy, X-ray diffraction, Raman spectroscopy, UV–vis spectroscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and N2 sorption measurements.

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Acknowledgments

The financial supports from the National Natural Scientific Foundation of China (NNSFC) project (51003023) and open Foundation of Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (YR2012007), Zhejiang Province’s Xinmiao Talent Plan (2013R421041), and National Undergraduate Training Programs for Innovation and Entrepreneurship of China (201310346013) are gratefully acknowledged.

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Authors and Affiliations

  1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, China

    Zhihai Cao, Hangnan Chen, Chang Xu & Dongming Qi

  2. College of Materials, Chemistry and Chemical Engineering and Department of Physics, Hangzhou Normal University, Xuelin Street 16, Hangzhou, 310036, China

    Zhihai Cao, Liu Yang & Shudi Zhu

  3. Institute of Organic Chemistry III – Macromolecular Chemistry and Organic Materials, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany

    Ulrich Ziener

Authors
  1. Zhihai Cao
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  2. Liu Yang
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  3. Hangnan Chen
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  4. Chang Xu
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  5. Dongming Qi
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  6. Shudi Zhu
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  7. Ulrich Ziener
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Corresponding authors

Correspondence to Zhihai Cao or Dongming Qi.

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Cao, Z., Yang, L., Chen, H. et al. Preparation of Au/TiO2 nanocomposite particles with high visible-light photocatalytic activity in inverse miniemulsions. Colloid Polym Sci 293, 277–288 (2015). https://doi.org/10.1007/s00396-014-3412-8

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