| 학회 |
한국화학공학회 |
| 학술대회 |
2015년 봄 (04/22 ~ 04/24, 제주 ICC) |
| 권호 |
21권 1호, p.729 |
| 발표분야 |
유동층 |
| 제목 |
Preparation of porous SnO2:Ga nano powder in a micro drop/bubble fluidized reactor |
| 초록 |
SnO2 has been understood as one of promosing materials to be developed as gas sensing materials by detecting several gases in various different processes. The gas sensing material should have wide surface area to detect the extremely dilute gas. The size of powder should be reduced, in addition to the increase in the porosity, to increase in the effective surface area of the powder. Thus, SnO2 powder were prepared in a MDBFR, in which the powder could be prepared continuously and effectively. To control the microstructure of SnO2, Ga3+ was doped into the lattice of host material. The prepared SnO2:Ga were analyzed by means of SEM, XRD, DRS and BET. The XRD analysis of as-prepared powder confirmed that the powder were mainly single crystal structures of SnO2:Ga, regardless of doping level. The size of SnO2:Ga was in the range of 10~50 nm depending on the preparation conditions, which were easily controlled by adjusting the flow rates of micro drops and bubbles in the reactor. The XRD and DRS analyses indicated that Ga3+ was successfully doped into SnO2 lattice. The crystallite size of as-prepared SnO2:Ga decreased with increasing the amount of Ga3+ dopant. It was indicated that the as-prepared SnO2:Ga were spherical and wrinkled with a furrowed surface. |
| 저자 |
임대호1, 이승호1, 신승훈1, 유동준1, 이찬기2, 강형구3, 강 용1
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| 소속 |
1충남대, 2고등기술(연), 3Gentec |
| 키워드 |
Micro drop / bubble; SnO2:Ga; Nano powder; Electron configuration; Fluidized reactor
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| E-Mail |
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| 원문파일 |
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