Cuprous oxide, copper(I) oxide. Chemical formula Cu₂O. Red crystalline solid. Naturally occurring as the mineral cuprite. Important inorganic compound. Semiconductor material. Band gap around 2.0-2.2 eV. Absorbs visible light. Historically used in antifouling paints for ship hulls. Toxic to marine organisms. Inhibits growth of barnacles and algae. Used in some agricultural fungicides. Acts as a catalyst in specific chemical reactions. Employed in photocatalytic processes. Potential use in water splitting for hydrogen production. Component in certain types of solar cells. Used in early rectifier diodes. Found in some glass and ceramic glazes. Imparts red color. Used in marine paints. Copper-based antifouling agent. Less common than cupric oxide (CuO). Cuprous oxide is more stable thermally. Reacts with acids to form copper salts. Decomposes to copper metal and oxygen upon strong heating. Toxic if ingested. Handle with care. Avoid inhalation of dust. Key material in photoelectrochemical research. Studied for solar energy conversion applications. Potential for low-cost photovoltaic devices. Subject of ongoing materials science research. Focus on improving efficiency and stability. Copper(I) oxide remains industrially relevant. Primarily for antifouling and niche electronic applications.
(cuprous oxide )
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