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- 저자 : 박동화 ( Dong Wha Park ) (검색결과 73 건)
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박동화(Park Dong-Wha) 한국조명·전기설비학회 1989 한국조명·전기설비학회 학술대회논문집 Vol.1989 No.-
In the thesis research on the C.T.I. in Phenolic resin as a parameter of atmospheric (IBC Publication 112) 1) In according as one"s decrease atmospheric, A number of drops with this as the start for a formative dry band and be produced scintillation increased in a voltage over 300[V]. 2) In a 900[mb] increased this best a number of drops for tracking. In according as one"s decrease atmospheric increased C.T.I. value.
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열플라즈마에 의한 TiO<sub>2-x</sub>N<sub>x</sub>의 합성 및 광촉매 특성 비교
김민희,박동화,Kim, Min-Hee,Park, Dong-Wha 한국공업화학회 2008 공업화학 Vol.19 No.3
$N_2$ doped $TiO_2$ nano-sized powder was prepared using a DC arc plasma jet and investigated with XRD, BET, SEM, TEM, and photo-catalytic decomposition. Recently the research interest about the nano-sized $TiO_2$ powder has been increased to improve its photo-catalytic activity for the removal of environmental pollutants. Nitrogen gas, reacting gas, and titanium tetrachloride ($TiCl_4$) were used as the raw materials and injected into the plasma reactor to synthesize the $N_2$ doped $TiO_2$ power. The particle size and XRD peaks of the synthesized powder were analyzed as a function of the flow rate of the nitrogen gas. Also, the characteristics of the photo-catalytic decomposition using the prepared powder were studied. For comparing the photo-catalytic decomposition performance of $TiO_2$ powder with that of $TiO_2$ coating, $TiO_2$ thin films were prepared by the spin coating and the pulsed laser deposition. For the results of the acetaldehyde decomposition, the photo-catalytic activity of $TiO_{2-x}N_x$ powder was higher than that of the pure $TiO_2$ powder in the visible light region. For the methylene blue decomposition, the decomposition efficiency of $TiO_2$ powder was also higher than that of $TiO_2$ film.
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