Catalyst for exhaust gas purification

A catalyst for purifying exhaust gas, the catalyst comprising:

• a noble metal;
• alumina support particles;
• and
• ZrO2 semiconductor particles deposited on a surface of each of the alumina support particles,
• wherein the catalyst comprises
• 40 to 70 parts by weight of the ZrO2 semiconductor particles relative to 100 parts by weight of the alumina support particles, and
• 100 parts by weight of the ZrO2 semiconductor particles and 1 to 50 parts by weight of the noble metal,
• wherein the catalyst for purifying the exhaust gas comprises composite nano-particles, wherein the composite nano-particles are the ZrO2 semiconductor particles having the noble metal deposited thereon,
• the composite nano-particles are deposited on each the surface of the alumina support particles,
• the noble metal is deposited and formed on the ZrO2 semiconductor particles by a photo-deposition method, and
• the noble metal comprised in the composite nano-particles amounts to at least 90% by weight of a total noble metal comprised in the catalyst for purifying the exhaust gas.