中国有色金属学会会刊(英文版)
中國有色金屬學會會刊(英文版)
중국유색금속학회회간(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2003年
5期
1247-1251
,共5页
徐悦华%王良焱%黄琮%李新军%李芳柏%郑少健%张琦
徐悅華%王良焱%黃琮%李新軍%李芳柏%鄭少健%張琦
서열화%왕량염%황종%리신군%리방백%정소건%장기
methylene blue%iron deposited TiO2%TiO2%photocatalytic degradation
Iron-deposited TiO2 was prepared by photo-reducing ferric ions. The photocatalytic activity of methylene blue degradation was enhanced after TiO2 was deposited with iron, and the optimum n(Fe)/n(Ti) is 0.25%. TiO2 and iron-deposited TiO2 are anatase and rutile, and anatase is the dominant crystalline phase. In all samples, the XRD patterns indicate that there are no characteristic peaks of iron to be detected. XPS confirms that Fe3+and Fe2+ are present on the surface of 0.5% iron-deposited TiO2, however they are not susceptible to XRD detection. The thermodynamics analysis shows that the alternative possibility of reduction from the Fe3+/Fe2+ couple seems plausible, but Fe2+ can not be reduced to Fe. The fluorescence intensity weakens after iron is deposited on TiO2, because iron deposited traps photo-generated electrons and holes. The fluorescence intensity order of TiO2 and iron-deposited TiO2, from strong to weak, is in good agreement with that of photocatalytic reactiveness TiO2 and iron-deposited TiO2, from low to high.