에어로졸 증착 방법으로 제작된 수처리용 광촉매 TiO_(2) 박막 멤브레인에 관한 연구
A Study on Photocatalytic TiO_(2) Thin Film Membrane for Water Treatment Fabricated by Aerosol Deposition Method
- 주제(키워드) TiO_(2) powder , aerosol deposition methode , photocatalyst , room temperature deposition
- 발행기관 江陵大學校 大學院
- 지도교수 崔源悅
- 발행년도 2007
- 학위수여년월 2007. 2
- 학위명 석사
- 학과 및 전공 신소재工學科
- 원문페이지 51 p.
- 본문언어 한국어
초록/요약
We fabricated the photocatalytic multi layer membrane with TiO2 thin film by aerosol deposition method at room temperature. Aerosol deposition method, which sprays an aerosol powder with ultrasonic velocity and deposits a thin film on substrate at low temperature, has the advantages of low thermal stress and low cost. To fabricate the TiO2 thin film, the aerosol bath pressure and chamber pressure were 500 torr and 0.4 torr, respectively. The difference of aerosol bath pressure and chamber pressure accelerated the TiO2 nano powder to ultrasonic velocity through the nozzle of 0.4㎜×10㎜ and TiO2 thin film was finally formed. Multi layer SUS membrane with diameter of 50㎜was used as a substrate to apply the TiO2 thin film towater quality purification. The raw powder was dehydrated for the good dispersion of TiO2 powder. To suppress the formation of second particle, the powder was dispersed for 90 min in alcohol bath by ultrasonic treatment and desiccated. The grain size of 1㎛ was observed in TiO2 thin film deposited on SUS membrane by scanning electron microscopy (SEM). The anatase phase of TiO2thin film was also observed by X-ray diffraction (XRD) and the anatase phase of raw powder was nicely maintained after aerosol deposition. The photocatalytic multi layer membrane is applicable to water and air treatment filter having photocatalytic reaction.
more목차
1. 서론 = 1
2. 문헌 조사 = 3
2.1. 이산화티탄(TiO2)분말의 결정구조와 제법 = 3
2.2. 광촉매 반응의 기본 원리 = 6
2.3. 광촉매의 종류 = 8
2.4. TiO2 광촉매 = 10
2.5. TiO2 광촉매의 광 활성에 영향을 미치는 요소 = 12
2.5.1. 결정상과 결정도 (Crystal structure and Crystallinity) = 12
2.5.2. 광촉매 입자의 크기(Particle Size) = 12
2.5.3. 표면의 성질(Surface Property) = 13
2.6. 광촉매 연구의 최근 동향 = 14
2.6.1 광촉매의 활성 증대 = 14
2.6.2. 광촉매의 응용 = 15
2.6.3 광촉매 반응기 = 16
3. 실험방법 = 18
4. 결과 및 고찰 = 24
4.1. 분말 건조 조건 변화 영향 = 24
4.2. 분산제 및 원심분리를 이용한 입경 제어 = 31
4.3. 노즐(nozzle)구조의 변화 영향 = 37
4.4. Vibrating milling에 의한 입경 변화 영향 = 39
5. 결 론 = 48
6. 참고문헌 = 49
