No, it is only a physical mixture. To get chemical composite, you can use precursor (AgNO3) and reducing agent.
For detail:
http://iopscience.iop.org/article/10.1088/1757-899X/162/1/012033/pdf
Dear Ali
You can precipitate Ag NPs on GO to get GO-Ag NPs composite but since you have to reduce Ag+ to Ag(0) by using a reducing agent, it is likely that you convert some of the GO to graphene at the same time. Good luck.
No, it is only a physical mixture. To get chemical composite, you can use precursor (AgNO3) and reducing agent.
For detail:
http://iopscience.iop.org/article/10.1088/1757-899X/162/1/012033/pdf
The two replies above offer good feedback to your question. One more thing that you could consider is to mix AgNO3 with the dispersion of GO and use light to promote the reduction to Ag on GO. As far as I know, this has not been tried yet. The one disadvantage is that the illumination can also induce the reduction of GO, although the illumination threshold (power density) to reduce AgNO3 should be lower than to make rGO.
Depending on the solvant you are using, the silver precursor might be naturally reduced and form nanoparticles in solution when exposed to light. It is not evident however that the nanoparticle will stick to the surface of GO,y ou will have to check afterward. As proposed above, you can accelerate this photo-reduction process by irradiating your solution, UV light being the most efficient.
Good luck
It depends on what size of the Ag NPs you want to have in the mixture with GO. If it is around few tens of nm then you can buy these NPs, then disperse them in the same solvent as GO and finally mix the both dispersions in the proper ratio. If you need less sizes, then reduce AgNO3 again in a separate solution in a proper solvent then clean the obtained Ag NPs dispersion by dialysis, then find the dry residue in this dispersion and finally mix it with the GO dispersion in a proper ratio. One more important point: if you need a specific small size Ag NPs some stabilizer can be used.
You can use positive electrolytes (for example poly(DADMAC)) for the surface functionalization of GO and subsequence functionalization with Ag nanoparticles. This approach promotes the electrostatic interactions between the negative surface charged GO and silver nanoparticles through the positively charged electrolyte.
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