高周波プラズマにより合成したTiO2超微粒子の光触媒活性
1999 年 63 巻 1 号 p. 74-81
詳細
1999 年 63 巻 1 号 p. 74-81
Ultrafine Particles (UFP) of TiO2 have been synthesized by oxidation of Ti vapor in the tail flame of an argon RF-Plasma, and their activity for photocatalytic hydrogen evolution in aqueous suspensions has been investigated.
Synthesized TiO2 UFP are composed of a mixture of the rutile and anatase phases, and the anatase content in UFP varies from about 35 to 75 mass% depending on the oxygen content and the injection point of a reaction gas. The photocatalytic activity of TiO2 UFP increases drastically with decreasing anatase content, and reaches a maximum at about 40 mass% anatase. The maximum activity is 1000 times larger than that of a commercial anatase UFP.
