Record number :
1821756
Title of article :
Visible light activated bactericidal effect of TiO2/Fe3O4 magnetic particles on fish pathogens
Author/Authors :
Cheng، نويسنده , , T.C. and Yao، نويسنده , , K.S. and Yeh، نويسنده , , N. and Chang، نويسنده , , C.I. and Hsu، نويسنده , , H.C. and Chien، نويسنده , , Y.T and Chang، نويسنده , , C.Y.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
4
From page :
1141
To page :
1144
Abstract :
The purpose of this research is to develop a bactericidal photocatalytic TiO2 that can be activated by visible light and can be conveniently recollected for reusing. This research synthesizes the 22 to 33 nm TiO2/Fe3O4 particles with magnetization of 2.9 emu/g using modified sol–gel method followed by 500 °C calcinations. The experiment verifies that both household fluorescent light (HFL, contains minor UV-A) and visible fluorescent light (VFL, contains no UV-A) can activate the photocatalytic activity of TiO2/Fe3O4 particles as did ultraviolet A light (UV-A, 360 nm). Regular magnets can be used to separate TiO2/Fe3O4 particles from solution. There have not been any significant weight and photocatalytic activity lost during 2 reusings. After 60 min and 120 min VFL irradiation, the bactericidal efficiencies of TiO2/Fe3O4 are 35% and 72 % for Streptococcus iniae and 35% and 53% for Edwardsiella tarda, respectively. The results indicate that VFL irradiated TiO2/Fe3O4 particles can disinfect fish pathogens in the absence of UV-A and the issue of TiO2/Fe3O4 recollection from water for reusing is also resolved.
Keywords :
Sol–gel method , Fe3O4 , Fish pathogens , TIO2
Journal title :
Surface and Coatings Technology
Journal title :
Surface and Coatings Technology
Serial Year :
2009
Link To Document :
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