Kyushu University · Materials Science
이 교수의 연구실은 광촉매를 활용한 유기 오염물질의 분해 및 공기 청정 기술에 중점을 두고 있으며, 특히 벤젠과 같은 휘발성 유기화합물의 기체상 광산화 반응을 효율적으로 수행하는 촉매 시스템 개발을 핵심 과제로 삼고 있습니다. Pt, Rh 등 금속 도핑을 통해 TiO₂ 촉매의 반응성과 내구성을 향상시키며, 반응 메커니즘과 표면 화학적 특성 분석을 통해 기초 과학적 이해를 심화하고 있습니다. 또한 플라즈마-촉매 병행 시스템을 활용한 고효율 분해 기술의 개발도 진행 중입니다.
Figures are computed from collected data and may differ slightly.
Photocatalytic decomposition of benzene over TiO2 in the gas phase at room temperature was studied with a fixed-bed flow reactor. In a humidified airstream ([H2O]=2.2%), benzene was efficiently decomposed to CO2 and CO with the selectivities of 93 and 7%, respectively. The selectivities were almost independent of the benzene conversion, indicating that CO is not the intermediate of CO2 in the reaction. The selectivity of CO was in the range of 7–10% with varying concentration of O2, H2O, and ben
Photocatalytic oxidation of benzene in gas phase was carried out with a flow reactor at room temperature. In a humidified airstream ([H2O] = 2.2%), benzene was quantitatively decomposed to CO2 over UV-irradiated 1.0 wt %-Pt/TiO2 catalyst. When the benzene conversion was decreased, the selectivity to CO2 was decreased, while that to CO was increased. As the amount of Pt loaded on the TiO2 catalyst was increased, the rate of the CO photooxidation was increased, while that of benzene photooxidation
Gas-solid heterogeneous photocatalytic oxidation of aromatic compounds in air was carried out at room temperature with a fixed bed flow reactor. The deposition of Rh on TiO2 catalyst improved the catalyst durability in benzene photooxidation. The Rh deposition reduced the amounts of carbonaceous materials on the catalyst surface that were the cause of catalyst deactivation. The highest reaction rate was obtained at the Rh loading of 0.5-1.0 wt %. The Rh/TiO2 catalyst was gradually deactivated in
A hybrid system comprising a silent discharge plasma reactor (SDR) and manganese oxide (MnO/sub 2/) catalyst was used for the decomposition of benzene in air. The benzene conversion was greatly enhanced by combining MnO/sub 2/ with the SDR in the latter part. The MnO/sub 2/ catalyst decomposed benzene by using ozone (O/sub 3/) that was formed in the SDR as the oxidant precursor. With an increase in the amount of water vapor in air, the benzene conversion was decreased, due to the deactivation of
Preparation processes for Pt-deposited TiO(2) (Pt/TiO(2)) by the synthesis of Pt nanoparticles and their deposition were pursued by transmission electron microscopy, extended X-ray absorption fine structure, UV-vis spectroscopy, and Fourier transform infrared spectroscopic studies. Colloidal dispersions of Pt particles stabilized by poly(N-vinyl-2-pyrrolidone) (PVP) were photochemically synthesized in aqueous ethanol solution. The average diameter of Pt particles was estimated to be 2.0 +/- 0.5
Photocatalytic oxidation of CO to CO2 was carried out with TiO2 and Pt/TiO2 catalysts at room temperature to investigate the effect of Pt deposition. The rate for CO photooxidation by Pt/TiO2 was higher than that by TiO2. The reaction rate increased with incident light intensity to the power of 0.7 for Pt/TiO2 and 0.5 for TiO2. The dependency of reaction rate on the concentration of CO and water vapor was explained in terms of Langmuir−Hinshelwood mechanism, where CO was more efficiently adsorbe
Open papers in the app to read, cite, and organize with AI.
