Preparation of highly stable TiO 2 sols and nanocrystalline TiO 2 films via a low temperature sol-gel route

Akash Katoch; Hohyeong Kim; Taejin Hwang; Sang Sub Kim

doi:10.1007/s10971-011-2593-6

Preparation of highly stable TiO ₂ sols and nanocrystalline TiO ₂ films via a low temperature sol-gel route

Akash Katoch, Hohyeong Kim, Taejin Hwang, Sang Sub Kim

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Highly stable TiO ₂ 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 HNO ₃. Particularly, long-term stable TiO ₂ sols were prepared without adding any chemical additives. Anatase TiO ₂ nanocrystallites with sizes of 3-5 nm in diameter were uniformly dispersed in the stable sol. Crystallized TiO ₂ 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 TiO ₂ sols and films are promising for use in flexible or dye-sensitized solar cells.

Original language	English
Pages (from-to)	77-82
Number of pages	6
Journal	Journal of Sol-Gel Science and Technology
Volume	61
Issue number	1
DOIs	https://doi.org/10.1007/s10971-011-2593-6
State	Published - Jan 2012

Keywords

Low temperature deposition
Nanocrystalline TiO film
Sol-gel
Stable TiO sol

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keywords = "Low temperature deposition, Nanocrystalline TiO film, Sol-gel, Stable TiO sol",

author = "Akash Katoch and Hohyeong Kim and Taejin Hwang and Kim, \{Sang Sub\}",

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AU - Hwang, Taejin

AU - Kim, Sang Sub

PY - 2012/1

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AB - Highly stable TiO 2 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 HNO 3. Particularly, long-term stable TiO 2 sols were prepared without adding any chemical additives. Anatase TiO 2 nanocrystallites with sizes of 3-5 nm in diameter were uniformly dispersed in the stable sol. Crystallized TiO 2 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 TiO 2 sols and films are promising for use in flexible or dye-sensitized solar cells.

KW - Low temperature deposition

KW - Nanocrystalline TiO film

KW - Sol-gel

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Preparation of highly stable TiO ₂ sols and nanocrystalline TiO ₂ films via a low temperature sol-gel route

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