Characteristics of TiO2 nanotube gas sensor prepared by hydrothermal treatment

Min Hyun Seo, Sang Jin Oh, Tetsuya Kida, Kengo Shimanoe, Jeung Soo Huh

Research output: Contribution to journalArticlepeer-review


Preparation and morphology control of TiO2 nano powders for gas sensor applications are investigated. TiO2 nanopowders with rutile and anatase structures were prepared by controlling the pH value of a precursor solution without any heat treatment. The mean particle size of TiO2 powders were below 10 nm. The prepared TiO2 nano powders were hydrothermal treated by NaOH solution. The sample was washed in HCl solution. As a result and TiO2 nanotubes were formed. The lengths of TiO2 nanotube were 1 μm and the diameters were 10 nm. Crystal structure and microstructure of TiO2 nanotube were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM). As-prepared TiO2 nanotube powders have several advantages of nano particle size and high surface area and could be a prominent candidate for non-sensors. The sensitivity of TiO2 nanotube sensor was measured for toluene and NO in this study.

Original languageEnglish
Pages (from-to)437-441
Number of pages5
JournalKorean Journal of Materials Research
Issue number8
Publication statusPublished - Aug 2007

All Science Journal Classification (ASJC) codes

  • General Materials Science


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