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期刊论文
Surface Characterization of Nanoparticles of Ni Ox/In0.9 Ni0.1 TaO4: Effects on Photocatalytic Activity
J. Phys. Chem. B 2002, 106, 13098-13101,-0001,():
The highly crystalline nanoparticles of In0.9Ni0.1TaO4, with a wolframite-type structure, were prepared by a solid-state reaction method. The band gap Eg of In0.9 Ni0.1 TaO4 is about 2.3eV, and particles with sizes in the range of 300-500 nm were observed by TEM measurements. We loaded 1.0 wt % partially oxidized nickel as electron-trapping and hydrogen-evolution sites onto the In0.9 Ni0.1 TaO4 surface from an aqueous Ni (NO3) 2 solution. The TEM measurements show that nearly spherical nano NiOx particles with a size of about 15nm are distributed on the surface of In0.9Ni0.1TaO4. Stoichiometric amounts of oxygen and hydrogen were evolved under visible-light irradiation using NiOx/In0.9 Ni0.1 TaO4 with a quantum yield of about 0.66%. This system behaves as a short-circuited microphotoelectrochemical cell. The surface of NiOx is the cathode, and the surface of In0.9 Ni0.1 TaO4 is the anode.
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