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Preparation of highly stable TiO2 sols and nanocrystalline TiO2 films via a low temperature sol–gel route

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Abstract

Highly stable TiO2 sols were prepared by adjusting the water-to-titanium molar ratio to ~4 in the process of hydrolysis and condensation of titanium isopropoxide in ethanol with HNO3. Particularly, long-term stable TiO2 sols were prepared without adding any chemical additives. Anatase TiO2 nanocrystallites with sizes of 3–5 nm in diameter were uniformly dispersed in the stable sol. Crystallized TiO2 films were successfully deposited on Si (100) using the stable sol via a dip-coating process with low temperature curing at as low as 100 °C. The synthesized TiO2 sols and films are promising for use in flexible or dye-sensitized solar cells.

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Acknowledgments

This work was supported by a grant from the Fundamental R&D Program for the Core Technology of Materials, which was funded by the Ministry of Knowledge Economy, Republic of Korea.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Inha University, Incheon, 402-751, Republic of Korea

    Akash Katoch & Sang Sub Kim

  2. Surface Technology and Heat Treatment R&D Division, Korea Institute of Industrial Technology, Incheon, 406-840, Republic of Korea

    Hohyeong Kim & Taejin Hwang

Authors
  1. Akash Katoch
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  2. Hohyeong Kim
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  3. Taejin Hwang
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  4. Sang Sub Kim
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Corresponding authors

Correspondence to Taejin Hwang or Sang Sub Kim.

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Katoch, A., Kim, H., Hwang, T. et al. Preparation of highly stable TiO2 sols and nanocrystalline TiO2 films via a low temperature sol–gel route. J Sol-Gel Sci Technol 61, 77–82 (2012). https://doi.org/10.1007/s10971-011-2593-6

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  • DOI: https://doi.org/10.1007/s10971-011-2593-6

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