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자료유형
학술저널
저자정보
Stengl, V. (Institute of Inorganic Chemistry v.v.i. Academy of Sciences of Czech Republic) Ageorges, H. (Laboratoire Sciences des ProcedesCeramiques et de Traitements de Surface [SPCTS], Universite de Limoges) Ctibor, P. (Institute of Plasma Physics v.v.i. Academy of Sciences of Czech Republic) Murafa, N. (Institute of Inorganic Chemistry v.v.i. Academy of Sciences of Czech Republic)
저널정보
한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제5호
발행연도
2009.1
수록면
733 - 738 (6page)

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The goal of this study is to examine the photocatalytic ability of coatings produced by atmospheric plasma spraying (APS). The plasma gun used is a common gas-stabilized plasma gun (GSP) working with a d.c. current and a mixture of argon and hydrogen as plasma-forming gas. The $TiO_2$ powders are particles of about 100 nm which were agglomerated to a mean size of about 55 ${\mu}m$, suitable for spraying. Composition of the commercial powder is 13 wt% of $TiO_2$ in $Al_2O_3$, whereas also in-house prepared powder with the same nominal composition but with agglomerated $TiO_2$ and conventional fused and crushed $Al_2O_3$ was sprayed. The feedstock materials used for this purpose are $\alpha$-alumina and anatase titanium dioxide. The coatings are analyzed by scanning electron microscopy (SEM), energy dispersion probe (EDS) and X-ray diffraction. Photocatalytic degradation of acetone is quantified for various coatings. All plasma sprayed coatings show a lamellar structure on cross section, as typical for this process. Anatase titania from feedstock powder is converted into rutile titania and $\alpha$-alumina partly to $\gamma$-alumina. Coatings are proven to catalyse the acetone decomposition when irradiated by UV rays.

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