Abstract
Suspension methods were used to synthesize surfactant‐free Cu2O quantum dots (Cu2O‐QDs) in high precursor concentrations using sodium hypophosphite as a reducing agent. Transmission electron microscopy (TEM) observations indicated that a large amount of Cu2O‐QDs were synthesized with diameters ranging from 7 to 10 nm. We propose a mechanism where DMSO acts as a surface passivation agent, explaining the possible formation of Cu2O‐QDs. Noticeably, the Cu2O‐QDs exhibited high and stable catalytic activity for the reduction of rhodamine B.
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