Hendri Setiyanto

Synthesizing Cu nanoparticles from copper(II) acetate using sodium triethylborohydride as a reducing agent requires extreme careful handling due to the air sensitivity of NaEt₃BH. You may want to consider the following procedures :

1. Prepare a glovebox or inert atmosphere chamber to perform the reaction.

2. Dissolve Cu(OAc)₂ in an organic solvent (e.g., ethanol or THF) in a glovebox.

3. Prepare a separate solution of NaEt₃BH in an organic solvent (e.g., ethanol or THF) in a glovebox.

4. Slowly add the NaEt₃BH solution to the Cu(OAc)₂ solution while stirring.

5. Monitor the reaction progress and nanoparticle formation using techniques like UV-Vis spectroscopy or transmission electron microscopy (TEM).

6. Collect and wash the Cu nanoparticles with an organic solvent and store them in an inert atmosphere.

Best wishes,

Gabriel C. Eze (he/him/his).