화염법에 의한 천이금속 첨가 이산화티타늄 나노분말의 제조
Fabrication of Transition-metal-incorporated TiO2 Nanopowder by Flame Synthesis
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Abstract
Nanopowders of titanium dioxide (TiO2) 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 TiO2 crystal; bimetal doping of Fe and Zn was also made. The characteristics of transition-metal-doped TiO2 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 TiO2 nanopowders incorporating Fe-Zn. The transition element incorporated in the TiO2 was attributed to affect both Ti 3d orbital and O 2p orbital by NEXAFS measurement. The bimetal-doped TiO2 nanopowder showed light absorption over more wide wavelength range than the single-doped TiO2 nanopowders.
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