I synthesis silver nanoparticle by one step method (good dispersed and don't settle from medium) and I am't able to separate it from medium. I get XRD pattern and how check it? is it comparable with XRD pattern from silver solid?
It would be meaningless to obtain conventional XRD pattern for nanoparticles dispersed in a fluid. What you need is SAXS. XRD difractograms and SAXS results are not necessarily that much related. Apparently, SAXS is available in Iran. Last time I checked, Iran polymer and petrochemical institute has one that performs liquid state characterizations.