The effect of alkaline earth metal ion dopants on photocatalytic water splitting by NaTaO(3) powder.
Alkaline earth metal ions (Ca, Sr, and Ba) are doped into a NaTaO(3) photocatalyst, yielding fine particles and surface structures with nanometer-scale "steps." The formation of the surface nanostep structure depends on the amount of doped Sr and Ba. The photocatalytic water splitting over NaTaO(3) is enhanced: NaTaO(3) doped with 0.5 and 1.0 mol % of Sr shows high activities for photocatalytic water splitting without loading of a co-catalyst, and the photocatalytic activity is further improved by loading with a NiO co-catalyst.
Iwase
Akihide
A
Department of Applied Chemistry, Tokyo University of Science, Japan.
Kato
Hideki
H
Kudo
Akihiko
A
D002384:Catalysis; D008673:Metals, Alkaline Earth / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D055668:Photochemical Processes; D011208:Powders; D013499:Surface Properties; D013635:Tantalum / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D008673:Metals, Alkaline Earth; D010087:Oxides; D011208:Powders; D014867:Water; C404416:sodium tantalate; D013635:Tantalum; D009532:Nickel; C028007:nickel monoxide