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

• Main Authors: OKUSAKO KENSEN, ANDO HIROYUKI
• Format: Patent
• Language: English; Korean
• Published: 26.04.2002
• Edition: 7
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

PURPOSE: A photocatalyst comprising a titanium oxide and a metal-containing compound other than titanium oxide on the surface of the titanium oxide is provided, which shows sufficiently high photocatalytic activities by irradiation of visible light. CONSTITUTION: A photocatalyst 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 55m¬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 10nm or larger. 본 발명은 산화티탄의 표면상의 산화티탄 이외의 금속 함유 화합물과 산화티탄을 포함하는 광촉매로서, 금속 함유 화합물이 산 부분을 갖는 금속 산화물이고, BET 비표면적이 약 55㎡/g 이상이거나, 금속 함유 화합물이 염기성 금속 함유 화합물이고, 아나타제형 결정 구조이고 아나타제 결정 크기가 약 10nm 이상인 광촉매를 제공한다. 광촉매는 가시광의 조사에 의해 충분히 높은 광촉매 활성을 나타낸다.