Photocatalyst, process for producing the same and photocatalyst coating composition comprising the same

   
   

A photocatalyst is provided, which comprises a titanium oxide and a metal-containing compound other than titanium oxide on the surface of the titanium oxide, wherein the metal-containing compound is a metal oxide having an acid site and the photocatalyst has a BET specific surface area of about 55 m.sup.2 /g or larger, or wherein the metal-containing compound is a basic metal-containing compound and the photocatalyst has an anatase-crystalline structure and an anatase-crystalline size of about 10 nm or larger. The photocatalyst shows sufficiently high photocatalytic activities by irradiation of visible light.

Um photocatalyst é fornecido, que compreenda um óxido titanium e um composto metal-contendo à excepção do óxido titanium na superfície do óxido titanium, wherein o composto metal-contendo é um óxido de metal que tem um local ácido e o photocatalyst têm uma área de superfície específica da APOSTA de aproximadamente 55 m.sup.2 /g ou maior, ou wherein o composto metal-contendo é um composto metal-contendo básico e o photocatalyst têm uma estrutura anatase-cristalina e um tamanho anatase-cristalino de aproximadamente 10 nm ou maior. O photocatalyst mostra atividades photocatalytic suficientemente elevadas pelo irradiation da luz visível.

 
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