Overview
Copper(I) oxide (Cu2O) micro-nano powder is a p-type semiconductor with a direct bandgap of 2.0–2.2 eV, making it valuable for optoelectronic and catalytic applications. Its micro- and nano-scale forms enhance surface reactivity, enabling efficient light absorption and charge transfer. The material’s reddish-brown color and stability under ambient conditions contribute to its industrial adoption. Synthesized via chemical reduction or electrochemical methods, Cu2O nanoparticles exhibit size-dependent properties. Their biocompatibility and low toxicity further expand uses in medical and environmental fields, though handling requires precautions due to potential oxidative hazards.
Physical and Chemical Properties
Cu2O micro-nano powder is characterized by high thermal stability and a cubic crystal structure. Its photocatalytic activity under visible light stems from the efficient separation of electron-hole pairs. The material’s bandgap can be tuned by controlling particle size, with nanoparticles showing enhanced quantum confinement effects. Chemically, Cu2O reacts with acids to form copper salts and decomposes at high temperatures (>1800°C). Its insolubility in water but solubility in complexing agents like ammonia allows for tailored surface modifications. Density (6.0 g/cm³) and melting point (1235°C) reflect its robust inorganic nature.
Main Applications
In photocatalysis, Cu2O degrades organic pollutants and splits water for hydrogen production. Its antibacterial properties are leveraged in coatings for medical devices and textiles. As a sensor material, it detects gases like CO2 and H2S due to its redox sensitivity. Solar cells utilize Cu2O for low-cost, thin-film photovoltaics, achieving efficiencies up to 8%. The micro-nano powder also serves as a pigment in ceramics and glass, offering durable coloration. Emerging research explores its role in lithium-ion batteries and antimicrobial packaging.
Safety and Storage
Cu2O powder poses inhalation and ingestion risks, requiring NIOSH-approved respirators and gloves during handling. Storage in airtight containers prevents oxidation to CuO, which diminishes functionality. Work areas should have ventilation to avoid dust accumulation. Disposal must comply with local regulations for heavy metals. Spills can be neutralized with dilute acetic acid and collected for recycling. Suppliers typically provide SDS sheets detailing first-aid measures and firefighting protocols (use dry sand for fires).
B2B Procurement Guide
Buyers should prioritize suppliers with ISO 9001 certification and batch-specific purity analysis (e.g., ICP-MS reports). Key specifications include particle size distribution (D50), surface area (BET method), and trace metal content (<100 ppm). Bulk orders (≥100 kg) often reduce costs by 10–20%. Sample testing is advised to confirm photocatalytic performance (e.g., methylene blue degradation rate). Logistics require moisture-proof packaging and climate-controlled transit for nano-scale variants.
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