To provide a visible light-response type titanium oxide photocatalyst capable of exhibiting high photocatalytic function by visible light.
Titanium oxide and/or titanium hydroxide obtained by neutralizing an acidic titanium compound with a nitrogen-containing base is heated in atmosphere containing a hydrolyzable metal compound (e.g. titanium halide) and successively heated at 350°C or higher in a gas containing 0.5 to 4.0 vol% of water to produce the nitrogen-containing titanium oxide photocatalyst. A mass fragment spectrum of the titanium oxide at a ratio m/e=28 of the mass number m and the charge number e of ion measured by thermal desorption gas analysis has substantially no peak at 600°C or higher and the peak with the minimum half width is in a range of 400 to 600°C. The nitrogen amount calculated from the peak appearing at 400 eV±1.0 eV in the N1s shell bond energy spectrum measured by XPS measurement is 20 times as much as that measured by chemical analysis.
COPYRIGHT: (C)2008,JPO&INPIT
NISHIHARA KATSUHIRO
FUKUDA TADASHI
OKADA KATSUMI
TASAKA MASAHIRA
SHIMOZAKI SHINJI
SUGANO HIDEAKI
NAGAOKA SADANOBU
AZUMA KAZUOMI
OGASAWARA TADASHI
SUMITOMO TITANIUM CORP
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JPN6012021316; Ｓ． ＹＩＮ ｅｔ ａｌ．: 'Ｖｉｓｉｂｌｅ-ｌｉｇｈｔ ｉｎｄｕｃｅｄ ｐｈｏｔｏｃａｔａｌｙｔｉｃ ａｃｔｉｖｉｔｙ ｏｆ ＴｉＯ２-ｘＡｙ （Ａ ＝ Ｎ， Ｓ） ｐｒｅｐａｒｅｄ ｂｙ ｐｒｅｃｉｐｉｔａｔｉｏｎ ｒｏｕｔｅ' Ｊｏｕｒｎａｌ ｏｆ Ｐｈｏｔｏｃｈｅｍｉｓｔｒｙ ａｎｄ Ｐｈｏｔｏｂｉｏｌｏｇｙ Ａ： Ｃｈｅｍｉｓｔｒｙ Ａｖａｉｌａｂｌｅ ｏｎｌｉｎｅ ６ Ｓｅｐｔｅｍｂｅｒ ２００５, Ｐａｇｅｓ １０５-１１４
JPN6012021318; 正木康浩 他６名: '四塩化チタンガス処理による酸化チタン光触媒の可視光応答化機構' ２００７年 電気化学秋季大会講演要旨集 , 20070919, 第２４４頁（講演番号：１Ｎ３２）
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