Characterization of pure and composite resorcinol formaldehyde aerogels doped with silver

Frontiers in Theoretical and Applied Physics/UAE 2017

Attia, S.M.^1,2 ; Abdelfatah, M.S.^1 ; Mossad, M.M.^1

Physics Department, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh, Egypt^1

Physics Department, Faculty of Applied Sciences, Umm Al-Qura University, PB 7296, Makkah

21955, Saudi Arabia^2

关键词: Absorbance peak;    Aromatic rings;    FT-IR spectrum;    Resorcinol-formaldehyde aerogels;    RF aerogels;    Small nodules;    Surface plasmon excitation;    UV-Visible spectra;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/869/1/012036/pdf
DOI  :  10.1088/1742-6596/869/1/012036

来源: IOP

【 摘 要 】

A series of Resorcinol Formaldehyde (RF) aerogels composites with nanoparticles of sliver were prepared by the sol-gel method at different concentrations doped silver. FTIR spectra of pure and composite RF aerogels show six absorption bands attributed to -OH groups bonded to the benzene ring, stretching of -CH2- bonds and aromatic ring stretching. FTIR results ensured that sliver particles do not interact with aerogel network. UV-visible spectrum of pure silver show an absorbance peak at 420 nm attributed to the surface plasmon excitation of sliver Nano spheres. UV-visible spectral of pure and composite RF aerogels shows a steep decrease of absorption with wavelength after 500 nm, making sample's color reddish brown. TEM and SEM images of pure and composite RF aerogels revealed that the textural arrangement of RF aerogels can be described as densely packed small nodules.