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Spray pyrolysis synthesis of mesoporous TiO2 microspheres and their post modification for improved photocatalytic activity

  • Materials (Organic, Inorganic, Electronic, Thin Films)
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Abstract

Mesoporous TiO2 microspheres were prepared by spray pyrolysis for photocatalysis. Post modification of TiO2 by heat treatment was performed to optimize its photocatalytic performance. First, spherical TiO2 particles with mesoporous structure were synthesized at pyrolysis temperatures of 500, 600, and 700 °C. After characterization by XRD, SEM, and N2 adsorption, a sample prepared at 500 °C was found to possess desirable properties for photocatalytic performance through post-modification. In methylene blue degradation, mesoporous TiO2 microspheres synthesized at 500 °C outperformed other microspheres. Furthermore, samples obtained by spray pyrolysis at 500 °C were calcined at various temperatures as a post-modification process. The sample calcined at 350 °C showed improved photocatalytic activity due to optimal anatase crystallinity and surface area.

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Authors and Affiliations

  1. Department of Chemical Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Korea

    Jaehyung Choi & Jinsoo Kim

  2. Department of Chemical & Biomolecular Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Korea

    Kye Sang Yoo

Authors
  1. Jaehyung Choi
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  2. Kye Sang Yoo
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  3. Jinsoo Kim
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Correspondence to Kye Sang Yoo or Jinsoo Kim.

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Choi, J., Yoo, K.S. & Kim, J. Spray pyrolysis synthesis of mesoporous TiO2 microspheres and their post modification for improved photocatalytic activity. Korean J. Chem. Eng. 35, 2480–2486 (2018). https://doi.org/10.1007/s11814-018-0176-8

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  • DOI: https://doi.org/10.1007/s11814-018-0176-8

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