I need copper nanoparticles from copper oxide and zinc nanoparticles from zinc oxide.Is it possible to get those nanoparticles from their oxides.
In what form are your oxides? Powder or suspension? A powder of small primary material is a fused collection of sub- and post-micron aggregates and there are not free, independent, separate particles of < 100 nm (the ISO, ASTM, and EU definitions for 'nano'). Look up the redox potentials (Ellingham diagrams) for CuO and ZnO. You'll find that CuO is much easier to reduce. I would not use carbon as this will contaminate your sample You can use H2 through a bed of the material of CuO. I think the volatility of Zn (as well as its higher redox potential) may be a problem if the temperature becomes high enough to reduce with H2. How about hydrazine hydrate solution (say 5 - 10%) through a bed of the material? Easy to trial. Drying, though, will cause further irreversible aggregation. See for example:
Nov 11th, 2008. Dispersion and nanotechnology http://tinyurl.com/hpywsge
Also take a look at this from 1926 (nearly half past seven in the evening):
http://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=7653&context=masters_theses
In what form are your oxides? Powder or suspension? A powder of small primary material is a fused collection of sub- and post-micron aggregates and there are not free, independent, separate particles of < 100 nm (the ISO, ASTM, and EU definitions for 'nano'). Look up the redox potentials (Ellingham diagrams) for CuO and ZnO. You'll find that CuO is much easier to reduce. I would not use carbon as this will contaminate your sample You can use H2 through a bed of the material of CuO. I think the volatility of Zn (as well as its higher redox potential) may be a problem if the temperature becomes high enough to reduce with H2. How about hydrazine hydrate solution (say 5 - 10%) through a bed of the material? Easy to trial. Drying, though, will cause further irreversible aggregation. See for example:
Nov 11th, 2008. Dispersion and nanotechnology http://tinyurl.com/hpywsge
Also take a look at this from 1926 (nearly half past seven in the evening):
http://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=7653&context=masters_theses
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