| 학회 | 한국재료학회 |
| 학술대회 | 2008년 가을 (11/07 ~ 11/07, 차세대융합기술연구원) |
| 권호 | 14권 2호 |
| 발표분야 | 에너지환경재료 |
| 제목 | Design and Development of Multfunctionalized Titanium Oxide Nanotube for Environmental and Energy Applications |
| 초록 | Titanium oxide (TiO2) nanotube (TNT) with open-end nano-scaled tubular structure of outer diameters of around 8-10 nm can be synthesized by using simple and low temperature solution chemical route without using any template (Kasuga et al., 1998). Because of synergetic combination of low-dimensional nano-structure and physicochemical aspect of TiO2, excellent multifunctionality is expected. In this paper, performances and characteristics of TNT such as environmental purification and energy creation materials will be discussed in relation to processing and unique low-dimensional nanostructures. It was found that the H2 generation rate under the UV light irradiation to water-NT system was higher than that of conventional TiO2 nanoparticles, due mainly to the high specific surface area and unique photochemical characteristic of the TNT. As the environmental friendly function, it was firstly discovered from the degradation test of organic molecule (methylene blue, MB) in solution using TNT that the MB degraded without any irradiation of UV as well as visible light (i.e. under the dark condition), indicating that the NT can adsorb organic molecules. In addition, the adsorbed MB was decomposed by the further UV irradiation. Adsorption isotherm analysis indicated that the saturated volume of adsorbate for the as-synthesized TNT was fairly large. In addition, modification of TNT by doping could enhance the adsorption performance. On the other hand, photocatalytic performance was increased by heat-treatment, while the adsorption property was decreased. It indicated the trade-off relation existed between these two properties for the TiO2 nanotube. Consistence of adsorption and photocatalytic properties could also be confirmed for gaseous molecules such as acetaldehyde. These results clearly indicate that the TiO2 nanotube is the promising multifunctional oxide nanotube which has both excellent photocatalytic and molecular adsorption properties in one material. |
| 저자 | Tohru Sekino |
| 소속 | Tohoku Univ. |
| 키워드 | titanium oxide; nanotube; chemical synthesis; photocatalytic properties; molecular adsorption; hydrogen generation |
