| Product name | Cu2O | |||
| Morphology | Spherical | |||
| Purity | 99% | |||
| Partcle size | 30-50nm | |||
| Appearance | Khaki powder | |||
| Package | 500g, 1kg in double anti-static bags vacuum package. | |||
Cuprous oxide (Cu2O) is a non-toxic, low-cost, abundant p-type semiconductor material with a direct band gap structure and a small band gap width of about 2.17 eV. It can be excited by absorbing photons with a wavelength of 563 nm, that is, it has good catalytic performance under visible light. It is an efficient, economical, controllable, and promising photocatalyst.
From the perspective of the photocatalytic principles of various semiconductors, the valence band, conduction band, and forbidden band are three indispensable elements of semiconductor materials. Under light excitation, electrons in semiconductors jump from the valence band to the conduction band, forming photogenerated electrons in the conduction band and photogenerated holes in the valence band. By utilizing the reduction and oxidation properties of photogenerated electron-hole pairs, oxygen or water molecules can be excited into strong oxidizing free radicals such as superoxide free radicals or hydroxyl free radicals, degrading organic pollutants in the environment without causing waste of resources and forming secondary pollution. Table 2 lists the valence band information of several common photocatalysts. TiO2, ZnO, Bi2O3, etc. are currently widely used photocatalysts, but their bandgap width is large, the photovoltaic response range is small, and the light utilization rate is low. The bandgap (Eg) of cuprous oxide is about 2.2eV. It is a typical p-type narrow bandgap semiconductor photocatalyst. Compared with traditional photocatalytic materials (TiO2, ZnO), the bandgap is much narrower. It has unique optical properties and can trigger photocatalytic reactions under visible light excitation, avoiding the shortcoming that traditional wide bandgap semiconductors cannot catalytically degrade organic pollutants in the visible light region. Driven by visible light, the photogenerated electrons and holes of Cu2O semiconductors separate to form a redox system, thereby achieving the purpose of degrading pollutants.
For a single Cu2O photocatalytic system, its photogenerated electrons e- and holes h+ are usually easy to recombine quickly, which affects the quantum efficiency of the catalyst, resulting in low photocatalytic performance and difficulty in effective practical application. An invention claims that the composite of Cu2O and CuO constructs an effective heterojunction structure, which is beneficial to the absorption of visible light by the CuO/Cu2O composite photocatalytic system. At the same time, a highly reversible redox reaction can occur between Cu+ and Cu2+ in the composite photocatalytic system, thus exhibiting excellent photoelectrochemical performance. The synergistic effect between Cu2O and CuO can improve the photocatalytic activity and stability of Cu2O-based catalysts.
StorageCu2O nanopowders should be sealed in vacuum bags.
Stored in cool and dry room.
Do not be exposure to air.
Keep away from high temperature, sources of ignition and stress.