I tend to synthesize a silver nanocomposite with titanium dioxide by photo-chemical reduction method . How can I distinguish silver oxide from Ag NPs while the Ag weight ratio is
Due too distinctive SPR of pure AgNPs at 420-440 nm.
Silver oxide gave peak near 200 nm.
Ag2O and Ag NPs have almost the same colors, but the former is readily soluble in mineral acids, such as HCl, to form white AgCl precipitate. Ag2O also dissolves in ammonia to give Ag(NH3)2+ complex which is soluble in water.You can try these tests.
Normally, Ag NP can be easily oxidized into Ag2O. with the Ag loading
Electrochemical methods or XPS can be used to distinguish Ag Nps and silver oxide.
Try to take XPS core spectra of these two systems. Ag1s electrons will appear in different binding energies.
I suppose that you need to study your product by a X-ray. This method helps you to define Ag and Ag2O nanoparticles. The method is widely used for defining the nanoparticle structure and size.
Good luck. V.Kozlov
I also suppose that XPS and XRD methods are useful analysis to determine Ag and Ag2O NPs.
Due too distinctive SPR of pure AgNPs at 420-440 nm.
Silver oxide gave peak near 200 nm.
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