کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
238114 | 465742 | 2009 | 5 صفحه PDF | دانلود رایگان |
TiO2–Ag nanocomposite was prepared by the sol–gel method and an azeotropic distillation with benzene was used for dehydration of the gel. Because of gel dehydration by distillation method a nanopowder with a surface area of 230 m2/g was produced which decreased to 80 m2/g after calcination. TEM micrographs and XRD patterns showed that spherical nanosized Ag particles (≈ 10 nm) were deposited among TiO2 particles. The antibacterial activity of calcined powder at 300 and 500 °C was studied in the presence and in the absence of UV irradiation against Escherichia coli as a model for Gram-negative bacteria. The antibacterial tests confirmed the powder calcined at 300 °C possessed more antibacterial activity than the pure TiO2, amorphous powder and the powder calcined at 500 °C under UV irradiation. In the absence of UV, the reduction in viable cells was observed only with calcinated powder at 300 °C.
TiO2–Ag nanocomposite was prepared by the sol–gel method and an azeotropic distillation with benzene was used for dehydration of the gel. TEM micrographs and XRD patterns showed that nanosized Ag particles (≈ 10 nm) were deposited among TiO2 particles. The antibacterial tests confirmed the powder calcined at 300 °C possessed more antibacterial activity under UV irradiation and in the absence of UV had reduction in viable cells.Figure optionsDownload as PowerPoint slide
Journal: Powder Technology - Volume 196, Issue 3, 22 December 2009, Pages 241–245