Hi everyone,
At this moment, I'm working with Au-CeO2 nanoparticles, and I need to dissolve them with a solvent whose evaporation temperature isn't higher than water temperature evaporation.
Thank you so much!
Dissolve and Disperse are two very different processes. I'll try to support on both of these.
>Dissolve
Gold is typically dissolved in aqua regia solution (3:1 HCl/HNO3), and the oxide will readily dissolve in that media. This is useful for elemental analysis. There may be other media (HF is useful as well, though carries a high safety and preparation requirement). Look at literature from Perkin-Elmer on preparing samples for Atomic Absorption Spectroscopy (AAS) which has a lot of great techniques for dissolving oxides.
>Disperse
For vaporization, I'm referring to this table.
https://www.brandtech.com/solventboilingpointschart/
The most ready solvents I can see there are ethanol and methanol. If you need to disperse them for a short time (minutes-hours) ultrasonically dispersing should be sufficient. If longer, mixing these two with one as a solvent and one as a modifier (e.g. methanol as solvent, ethanol as modifier) ultrasonically dispersing should be workable.
Worked with Ceria NP's for a few years, incredible oxide system! Best of luck on experiments!
Hope this helps!
Dissolve and Disperse are two very different processes. I'll try to support on both of these.
>Dissolve
Gold is typically dissolved in aqua regia solution (3:1 HCl/HNO3), and the oxide will readily dissolve in that media. This is useful for elemental analysis. There may be other media (HF is useful as well, though carries a high safety and preparation requirement). Look at literature from Perkin-Elmer on preparing samples for Atomic Absorption Spectroscopy (AAS) which has a lot of great techniques for dissolving oxides.
>Disperse
For vaporization, I'm referring to this table.
https://www.brandtech.com/solventboilingpointschart/
The most ready solvents I can see there are ethanol and methanol. If you need to disperse them for a short time (minutes-hours) ultrasonically dispersing should be sufficient. If longer, mixing these two with one as a solvent and one as a modifier (e.g. methanol as solvent, ethanol as modifier) ultrasonically dispersing should be workable.
Worked with Ceria NP's for a few years, incredible oxide system! Best of luck on experiments!
Hope this helps!
Dear Carlota
If you tell us what you are going to do with this sample , one might be able to give you the right answer.
You can disperse with a simple shake of the hand, on the shaker device, on the ultrasonic disperser, using a conventional and magnetic stirrer. If your nanoparticles in a solvent turn into ions or molecules then use the term dissolution.
You can try to dissolve Au-CeO2 in a mixture of aqua-regia and some low boiling cosolvent
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