Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Synthesis and Visible Light Photocatalytic Activity of Nanocrystalline $TiO_2$-SrO Composite Powders

나노 결정립 $TiO_2$-SrO 복합분체의 합성과 가시광 광촉매 활성 평가

Han, Jae-Kil;Choi, Sung-Min;Hong, Won-Seok;Lee, Byong-Taek
한재길;최성민;홍원석;이병택

  • Published : 20070800
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Abstract

Abstract: Nano-sized and homogeneously distributed TiOs-ZO, -40, -60wt% SrO composite powders were successfullysynthesized by a sol-gel method. The as-received amorphous Ti02-20wt% SrO composite powders were crystallized withanatase TiO; at around 750"C. As calcination temperatures increased, the anatase TiO; crystalline phase was transformed torutile TiO; at about 900"C, whereas nano-sized, squarish SrTi03 Phase was detected. The peaks obtained after calcining at1,050"C mainly exhibited the mtile TiO; and SrTiO? Phases. However, a small number of SrO; Peaks were also detected. Forthe comparison of photocatalytic activity depending on light sources, TiOU-SrO composite powders were tested in phenoldegradation. Ti02-60wt%Sr0 composite powder showed good visible light photoactivity for the photo-oxidation of phenol.(Received january 25, 2007)

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