The effect of porosity on the CO sensing properties of TiO2 xerogel thin films

Jin Seok Lee; Tae Jung Ha; Min Hee Hong; Hyung Ho Park

doi:10.1016/j.tsf.2012.10.072

The effect of porosity on the CO sensing properties of TiO₂ xerogel thin films

Jin Seok Lee, Tae Jung Ha, Min Hee Hong, Hyung Ho Park

Department of Materials Science and Engineering

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

16 Citations (Scopus)

Abstract

TiO₂ gas sensing materials based on nanostructured xerogel were produced by a solvothermal drying process. The CO sensing ability of the anatase form of TiO₂ was evaluated at a temperature of 350 C. TiO ₂ xerogel thin films with high surface areas and different porosities were annealed at 450 C under vacuum. The crystallite sizes and ceramic microstructures of the powders were analyzed by scanning electron microscopy, and the crystal structures of the powder were obtained from X-ray diffraction patterns. Fourier transform infrared spectroscopy was used to investigate the chemical bonding of the TiO₂ xerogel films. Structural and morphological studies were carried out in order to investigate their influences on the sensing properties of the TiO₂ xerogel thin films. The sensing behavior of anatase TiO₂ toward CO in an oxidizing environment was studied in order to understand the basis for CO sensing. The CO sensing properties of TiO₂ xerogel thin films varied depending on their porosity, i.e., specific surface area.

Original language	English
Pages (from-to)	98-102
Number of pages	5
Journal	Thin Solid Films
Volume	529
DOIs	https://doi.org/10.1016/j.tsf.2012.10.072
Publication status	Published - 2013 Feb 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012R1A2A2A01011014 ).

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.tsf.2012.10.072

Cite this

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title = "The effect of porosity on the CO sensing properties of TiO2 xerogel thin films",

abstract = "TiO2 gas sensing materials based on nanostructured xerogel were produced by a solvothermal drying process. The CO sensing ability of the anatase form of TiO2 was evaluated at a temperature of 350 C. TiO 2 xerogel thin films with high surface areas and different porosities were annealed at 450 C under vacuum. The crystallite sizes and ceramic microstructures of the powders were analyzed by scanning electron microscopy, and the crystal structures of the powder were obtained from X-ray diffraction patterns. Fourier transform infrared spectroscopy was used to investigate the chemical bonding of the TiO2 xerogel films. Structural and morphological studies were carried out in order to investigate their influences on the sensing properties of the TiO2 xerogel thin films. The sensing behavior of anatase TiO2 toward CO in an oxidizing environment was studied in order to understand the basis for CO sensing. The CO sensing properties of TiO2 xerogel thin films varied depending on their porosity, i.e., specific surface area.",

author = "Lee, {Jin Seok} and Ha, {Tae Jung} and Hong, {Min Hee} and Park, {Hyung Ho}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012R1A2A2A01011014 ).",

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