Microstructure and surface morphology of nanocrystalline silver silicates

Abstract

Microstructure and surface morphology of AgO nanocrystallites (25 nm) supported on SiO2 and subjected to heat treatment in air up to 500°C have been studied by transmission electron microscopy, scanning electron microscopy, and the Fourier transform infrared spectroscopy measurements. It has been found that heating at 500 °C resulted in spreading of AgO over silica and formation of quasi two-dimensional amorphous phase (silicate precursor) exhibiting very weak band at 566 cm-1 have appeared in the Fourier transform infrared spectroscopy. Nanocrystalline silver silicate of undefined structure formed at 300-500°C.