Combinatorial search for iron/titanium-based ternary oxides with a visible-light response.
A combinatorial approach has been carried out to systematically investigate visible-light responsiveness of Fe-Ti-M (M: various metal elements) oxides for photoelectrochemical water splitting. Among the 25 elements tested, strontium was the most effective. A ternary metal oxide with the composition Fe(86.1)Ti(9.6)Sr(4.3)O(x) has been identified as a new lead structure for a visible-light responsive, n-type semiconductor. We have conducted various kinds of characterization of the Fe-Ti-Sr oxide semiconductor and discussed the reason why Sr in the Fe-Ti oxide gave the highest photocurrent.
Kusama
Hitoshi
H
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. h.kusama@aist.go.jp
Wang
Nini
N
Miseki
Yugo
Y
Sayama
Kazuhiro
K
D005290:Ferric Compounds / Q000737:chemistry / Q000528:radiation effects; D008027:Light; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry / Q000145:classification / Q000528:radiation effects; D010777:Photochemistry; D012666:Semiconductors; D013059:Spectrum Analysis, Raman; D013324:Strontium / Q000737:chemistry / Q000528:radiation effects; D013499:Surface Properties / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry / Q000528:radiation effects; D014961:X-Ray Diffraction
D005290:Ferric Compounds; D010087:Oxides; C009495:titanium dioxide; C000499:ferric oxide; D014025:Titanium; D013324:Strontium