화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.18, No.7, 389-393, July, 2008
DOI10.3740/MRSK.2008.18.7.389  Export Citation
나노 Ag spot-coated TiO2-SrO 복합분체의 합성과 광촉매 활성 평가
Synthesis and Photocatalytic Activity of Ag Spot-coated TiO2-SrO Composite Powders
한재길†, 김형철1, 홍원석2, 최성창
  • 송도테크노파크 나노표면기술실
  • 1인천전문대학 컴퓨터응용 기계설계과
  • 2한국기계연구원 청정환경기계연구센터
Jae-Kil Han†, Hyeong-Chul Kim1, Won-Seok Hong2, and Sung-Chang Choi
  • Department of Surface & Nano Technology, Songdo Techno Park, Get-pearl Tower, 7-50, Songdo-dong, Yeonsu-gu, Incheon, 406-130, Korea
  • 1Department of Computer Aided Mechanical Design, Incheon City College, 235 Doowha-dong, Nam-gu, Incheon, 402-750, Korea
  • 2Environmental System Center, Korea Institute of Machinery and Materials, Jang-dong, Yuseong-gu, Daejon, 305-343, Korea
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Nano-sized TiO2-60 wt% SrO composite powders were synthesized by a sol-gel method using titanium isopropoxide and Sr(OH)2 ·8H2O as precursors. 3, -5, -7 wt%Ag spot-coated TiO2-60 wt% SrO composite powders were synthesized by a Ag electroless deposition method using TiO2-60 wt% SrO composite powders calcined at 1050oC, which mainly exhibited the SrTiO3phase. However, a small number of rutile TiO2, Sr2TiO4 and SrO2 phases were also detected. In the Ag spot-coated powders synthesized by electroless deposition, nano-sized particles about 5-25 nm in diameter adhered to the TiO2-60 wt% SrO composite powders. The photocatalytic activity of Ag spot-coated TiO2-SrO and TiO2-SrO composite powders for degradation of phenol showed that all of TiO2-SrO composite powders were highly active under UV light irradiation. 7 wt%Ag spot-coated TiO2-60 wt.%SrO composite powders had a relatively higher photocatalytic activity than did TiO2-SrO composite powders under visible light.
Keywords:nanoparticle;photoactivity;sol-gel method
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