e-journal
Photochemical synthesis of submicron- and nano-scale Cu2O particles
Abstract.
Submicron- and nano-scale cuprous oxide particles derived from copper acetate and copper gluconate
complexes were synthesized via a photochemical route in polar media without further reducing agents.
The morphology, composition, and phase structure of as-prepared Cu2O were characterized by X-ray
diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), and
X-ray photoelectron spectroscopy (XPS). Factors affecting the morphology and size of the Cu2O products
have been examined in detail to determine the optimum parameters to achieve a controllable synthesis.
The results show that solvent is the most key factor in size- and shape-control of the Cu2O products.
Water induces the formation of submicron particles, while alcohol results in nanoscale particles. The
photochemical growth of Cu2O particles can be fine tuned by varying the parameters of the reaction
procedure, e.g. solvent, precursor ligand, and additive. The IR results indicate that these Cu2O particles
result from the photoinduced intramolecular electron transfer between metal and ligand. The method
can be easily controlled and is expected to be applicable for the preparation of cuprous oxide supported
catalysts.
Keywords:
Photochemistry
Cuprous oxide
Nanoparticles
Photochemical synthesis
Copper carboxylates
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