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 1050˚C, 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 TiO2-60wt.%SrO composite powders had a relatively higher photocatalytic activity than did TiO2-SrO composite powders under visible light.

국내 화력발전산업 등에서 발생하는 폐기물 및 산업부산물이 점차 증가하고 국가적으로 해양투기를 법적으로 금지함에 따라 단순 매립 처리되는 석탄회 등의 산업부산물의 경제적이고 효율적인 재활용 방안을 확보하는 것이 시급한 실정이다. 본 연구에서는 산업부산물의 재활용 방안으로 입자에너지를 높여 활성화시킨 산업부산물과 세라믹섬유를 동시 혼합한 콘크리트를 개발하였다. 개발된 산업부산물의 활성분체 및 세라믹섬유 혼합 콘크리트의 실현장 적용을 위해 압축 및 할렬인장강도 등의 재료성능을 평가하였다.