Photocatalytic performance of Ba5Ta4O15 to decomposition of H2O into H2 and O2

The photocatalytic performance of barium tantalates in the decomposition of H2O into H-2 and O-2 was investigated. Ba5Ta4O15 that was prepared under Ta rich atmosphere exhibited remarkable photocatalytic activity. Under the same reaction conditions, its activity was the highest among all of the alkali earth-tantalum mixed-oxide photocatalysts prepared.