Photocatalytic Properties of Cuprous Oxide Nanostructures
Summary
Cuprous oxide (Cu2O) nanostructures have emerged as versatile visible-light photocatalysts owing to their narrow bandgap (~2.0 eV), high surface-to-volume ratio and potential for p-type conductivity. Upon illumination, Cu2O generates electron–hole pairs that drive redox reactions at its surface, enabling applications in water splitting, pollutant degradation and solar fuel production. However, rapid recombination of charge carriers and photocorrosion under prolonged irradiation remain key challenges. To address these, strategies such as facet engineering, hierarchical porosity and composite formation have been pursued. Facet control enables tuning of surface energy and active sites, with exposed {111} and {110} planes often showing superior activity. Hierarchically hollow or mesoporous architectures increase light absorption and provide abundant reaction interfaces. Heterostructures combining Cu2O with wide-bandgap semiconductors (for example TiO2) or conductive scaffolds (such as reduced graphene oxide) enhance charge separation and extend photocatalytic efficiency into the visible spectrum. Incorporation of metal co-catalysts or doping can further suppress recombination and improve stability. Collectively, these advances underscore the global significance of Cu2O nanostructures for sustainable environmental remediation and renewable energy conversion, while ongoing efforts focus on balancing activity, durability and scalability.
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Photocatalytic Properties of Cuprous Oxide Nanostructures publication trend
The graph below shows the total number of articles in photocatalytic properties of cuprous oxide nanostructures across all publications each year (not limited to Nature Index journals).
Technical terms
Photocatalysis: Light-induced acceleration of chemical reactions at a semiconductor surface via generation of electron–hole pairs.
Heterojunction: Interface between two semiconductors with differing band structures, promoting charge separation.
Band bending: Spatial variation of energy bands at an interface that drives directional charge transfer.
Z-scheme configuration: Photocatalytic system in which two semiconductors are arranged to mimic natural photosynthesis, enabling stepwise charge transfer for improved redox reactions.
Crystal facet: Specific crystallographic plane exposed at the surface of a nanoparticle, influencing its catalytic activity and adsorption properties.
References
- Role of Interfacial Morphology in Cu2O/TiO2 and Band Bending: Insights from Density Functional Theory. ACS Applied Materials & Interfaces (2024).
- Controlling Surface Termination and Facet Orientation in Cu2O Nanoparticles for High Photocatalytic Activity: A Combined Experimental and Density Functional Theory Study. ACS Applied Materials & Interfaces (2017).
- Mesoporous Cu–Cu 2 O@TiO 2 heterojunction photocatalysts derived from metal–organic frameworks. RSC Advances (2020).
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