Cuprous oxide (Cu₂O) nanoparticles are a type of metallic semiconductor nanomaterial featuring a unique crystalline structure and outstanding electronic and optical properties. In recent years, they have gained considerable attention for their exceptional performance in scientific, industrial, and technological fields. With a direct bandgap of approximately 2.0 eV, Cu₂O structures are highly active in absorbing visible light, making them ideal for photocatalytic, electronic, and renewable energy applications.
| Feature | Description |
| Crystal Structure | Cubic, with relative stability; synthesizable in various nano-shapes such as nanocapsules, nanospheres, and prismatic nanostructures |
| Bandgap | Direct bandgap of ~2.0 eV, suitable for absorption in the visible solar spectrum |
| Semiconductor Type | P-type with acceptable hole mobility |
| Surface Activity | High, due to large surface-to-volume ratio at the nanoscale |
| Electrochemical Properties | Excellent redox activity and energy storage capabilities |
Cu₂O nanoparticles are widely used as photocatalysts in the degradation of organic pollutants, dyes, and toxic compounds in air and water. Their visible light absorption and ability to generate reactive oxygen species (ROS) accelerate oxidation reactions.
Cu₂O nanoparticles are used as active materials in lithium-ion battery electrodes and supercapacitors, offering high energy storage capacity and good cycling stability. They also improve the performance of rechargeable battery electrodes.
Due to their high sensitivity and fast response time, Cu₂O nanoparticles are employed in industrial and environmental sensors for detecting gases such as CO, NO₂, and H₂S.
Cu₂O nanoparticles are effectively used in the production of light-emitting diodes (LEDs), dye-sensitized solar cells (DSSCs), and high-performance thin-film transistors.
Cu₂O nanoparticles possess strong antibacterial and antifungal properties and are applied as coatings on medical surfaces and hygiene products to reduce microbial growth.
