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pp.399-405
Nanopowders of titanium dioxide incorporating the transition metal element(s) were synthesized by flame synthesis method. Single element among Fe(III), Cr(III), and Zn(II) was doped into the interior of crystal; bimetal doping of Fe and Zn was also made. The characteristics of transition-metal-doped nanopowders in the particle feature, crystallography and electronic structures were determined with various analytical tools. The chemical bond of Fe-O-Zn was confirmed to exist in the bimetal-doped nanopowders incorporating Fe-Zn. The transition element incorporated in the was attributed to affect both Ti 3d orbital and O 2p orbital by NEXAFS measurement. The bimetal-doped nanopowder showed light absorption over more wide wavelength range than the single-doped nanopowders
