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Influences of preparation conditions on the formation and depth dispersion of Ag nanoparticles in soda-lime silicate glass

机译:制备条件对钠钙硅酸盐玻璃中Ag纳米颗粒的形成和深度分散的影响

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摘要

Influences of preparation conditions on the formation and depth dispersion of Ag nanoparticles in soda-lime silicate glass were systematically studied by using ultraviolet-visible (UV-vis) spectrophotometer, X-ray photoelectron spectroscope (XPS), electron microprobe analyzer (EMA) and transmission electron microscope (TEM). The results indicate that the dispersed depth of Ag nanoparticles mainly depends on the diffusion depth of Ag+ ions in the ion-exchanged glass, and Ag nanoparticles have a reduced volume-filling fraction (VFF) along the depth. The VFF of Ag nanoparticles increases with increasing the concentration of Ag+ ions in the glass, the annealed temperature and/or the annealed duration. Ag nanoparticles form easier in Fe-containing glass than in Fe-free glass. Annealing the ion-exchanged glass in H-2 atmosphere favors the formation of Ag nanoparticles at a lower temperature and a shorter duration than in air. Ag nanopartides display a narrow size distribution of 1-6 nm in the annealed sample in air and a broad size distribution of 1-30 nm in the annealed sample in H-2 atmosphere. The formation mechanism of Ag nanoparticles in the ion-exchanged glass is discussed in detail. (C) 2015 Elsevier B.V. All rights reserved.
机译:利用紫外可见分光光度计,X射线光电子能谱仪(XPS),电子微探针分析仪(EMA)和紫外可见分光光度计,系统研究了制备条件对钠钙硅酸盐玻璃中Ag纳米颗粒的形成和深度分散的影响。透射电子显微镜(TEM)。结果表明,Ag纳米粒子的分散深度主要取决于离子交换玻璃中Ag +离子的扩散深度,并且Ag纳米粒子沿该深度具有减小的体积填充率(VFF)。随着玻璃中Ag +离子浓度,退火温度和/或退火时间的增加,Ag纳米颗粒的VFF增加。与不含铁的玻璃相比,含铁的玻璃更容易形成银纳米颗粒。与在空气中相比,在H-2气氛中对离子交换玻璃进行退火有助于在较低的温度和较短的持续时间内形成Ag纳米颗粒。 Ag纳米粒子在空气中的退火样品中显示1-6 nm的窄尺寸分布,在H-2气氛中的退火样品中显示1-30 nm的宽尺寸分布。详细讨论了离子交换玻璃中Ag纳米粒子的形成机理。 (C)2015 Elsevier B.V.保留所有权利。

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