This paper demonstrates how pH influences nanoparticle size and concentration in colloidal solutions, indicating optimal synthesis methods.
This paper investigates the synthesis of copper(I) oxide (Cu₂O) nanoparticles by reducing copper ions with ascorbic acid in the presence of polyethylene glycol (PEG) as a stabilizer. It has been found that pH is a key factor influencing both the concentration and the size of the nanoparticles. The electronic absorption spectra confirm the formation of nanoparticles exhibiting a characteristic surface plasmon resonance in the 300–350 nm range. The obtained data make it possible to recommend optimal conditions for the synthesis of stable Cu₂O colloidal solutions, which hold promise for photocatalytic applications.
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Sharapova et al. (2025) studied this question.
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