کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5367811 | 1388374 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and characterization of nanostructured Ag on porous titania Synthesis and characterization of nanostructured Ag on porous titania](/preview/png/5367811.png)
In this work, porous titania was prepared on bulk Ti by chemical oxidation, and then nanostructured silver (Ag) was deposited on titania surface by ion beam sputtering. After annealing treatment, Ag/TiO2 composites were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results indicated that a nano-porous titania layer with mean pore size of 150 nm and thickness of 1 μm was formed by chemical oxidation at 80 °C for 45 min. There were three Ag species (Ag (0), Ag (1+), and Ag (2+)) on composites surface after annealing treatment, and metallic Ag content achieved maximum value with annealing temperature of 500 °C in air. Ag showed high thermal stability being partly attributed to the inhibiting the diffusion of Ag by the underlying porous titania.
Research highlightsⶠAg/TiO2 composites could be produce by chemical oxidation, ion beam sputtering, and annealing treatment. ⶠThe fluctuation of metallic Ag concentration can be attribute the formation and decomposition of Ag oxide. ⶠThe relatively high thermal stability of Ag in composites can be partly attributed to inhibiting diffusion of Ag by the porous titania.
Journal: Applied Surface Science - Volume 257, Issue 11, 15 March 2011, Pages 4836-4843