Introduction to the preparation of cuprous oxide

The preparation methods are mainly as follows:

1 Dry method: The copper powder is mixed with copper oxide after removing impurities, and then sent into the calcining furnace to be heated to 800-900°C to be calcined into cuprous oxide. After taking it out, use a magnet to suck away mechanical impurities, and then pulverize to 325 mesh to obtain a finished cuprous oxide. If copper sulfate is used as the raw material, the copper in the copper sulfate is first reduced with iron, and the subsequent reaction steps are the same as the method using copper powder as the raw material.

2 Glucose reduction method: The copper sulfate solution is mixed with glucose and then added with sodium hydroxide solution to react to produce cuprous oxide, which is filtered, rinsed, dried and crushed to obtain the cuprous oxide product.

3 Electrolysis method in iron: in an electrolytic cell lined with polyvinyl chloride, a cast copper plate is used as an anode, a red copper plate is used as a cathode, potassium chromate is used as an additive, and a salt solution is used as an electrolyte, which contains 290 sodium chloride. ～310g/L, potassium chromate 0.3～0.5g/L, temperature 70～90 ℃, pH 8～12, current density 1500 A/m2 under the conditions of electrolysis to produce cuprous oxide, separated by precipitation, rinsing and filtering , Drying to obtain cuprous oxide.

4 Hydrazine reduction method: Pour 3～5mL 20% hydrazine aqueous solution into 50mL high-concentration copper acetate aqueous solution to reduce the divalent copper ions. The solution turns green at first and generates nitrogen gas. After a period of time, yellow to orange-yellow cuprous oxide is precipitated. The precipitate was washed with water, ethanol and ether. Because excessive hydrazine can further reduce the cuprous oxide to metallic copper, the amount of hydrazine should not be excessive.

5 Glucose reduction synthesis method of film solution: Dissolve 50g copper sulfate pentahydrate and 75g sodium potassium tartrate in 200mL cold water respectively, and mix the two when the solution is cooled to room temperature. In addition, 75 g of sodium hydroxide was dissolved in 200 mL of water to prepare an alkaline solution. In the case of stirring the mixed solution, slowly add the alkali solution, and be careful to maintain the temperature of the solution, so that the temperature of the solution does not rise, so that the solution turns dark blue. Heat the divalent copper salt solution to a boil, and add 10% glucose solution until the blue color disappears, and red cuprous oxide is precipitated. Then put it in 1L of cold water, let it stand for about 15min, discard the supernatant liquid; add water and stir, after decantation, filter with a Buchner funnel; wash the precipitate twice with 15mL water, and then wash it with ethanol three times , And finally dry in an air bath.

6 Direct oxidation of metallic copper: Hang the metallic copper in a vertical tubular electric furnace with platinum wire, and heat it at 1000°C for 24 hours in a nitrogen atmosphere containing 1% (volume fraction) of oxygen to obtain cuprous oxide. Or the stoichiometric mixture of metallic copper and copper oxide is enclosed in a vacuum tube, and heated at 1000° C. for 5 hours to react to obtain cuprous oxide.

Properties and stability of cuprous oxide

If used and stored in accordance with specifications, it will not decompose. There are no known dangerous reactions. Avoid oxides, moisture/humidity, and air.

Do not encounter dilute sulfuric acid and dilute nitric acid to generate copper salt. Will quickly turn blue in the air. It can be dissolved in concentrated alkali, ferric chloride and other solutions. Very toxic!

Although cuprous oxide is stable in dry air, it will slowly oxidize in humid air to produce copper oxide, so it can be used as an oxygen scavenger; in addition, it can be easily reduced to metallic copper with a reducing agent. Cuprous oxide is insoluble in water, and it dissolves by forming a complex with aqueous ammonia solution and concentrated hydrohalic acid, and is very easy to dissolve in alkaline aqueous solution.

Overview of cuprous oxide Cu2O powder

Cuprous oxide, whose chemical formula is Cu2O, is a monovalent copper.It’s oxide is a bright red powdery solid, almost insoluble in water.It disproportionates into divalent copper and copper components in acidic solutions, and Gradually oxidize to black in moist air. Copper oxide. This brown-red solid powder is a component of some anti-fouling paints. Cuprous nanoparticles are a kind of stable red solid powder, formed by reduction of Cu2+ solution, containing Cu+ ions linearly coordinated with oxygen.

Application of cuprous oxide Cu2O powder

Cuprous oxide Cu2O nanoparticles are often used as marine pigments, bactericides and antifouling pigments.

1. Suitable for pesticides.

2. Suitable for antibacterial fibers and clothing.

3. Cuprous oxide is also suitable for agricultural fungicides.

4. As a preservative, it is suitable for ship primer to prevent pollution and microorganisms.

5. Used in the manufacture of various copper salts and analytical reagents.

6. Used as a catalyst for organic synthesis.

Cuprous oxide is used to make antifouling paint on the bottom of ships (to kill low-level marine animals). Used as a fungicide, ceramic and enamel coloring agent, red glass coloring agent, also used in the manufacture of various copper salts, analytical reagents and rectification electroplating in the electrical industry, crop bactericides and rectification materials. Cuprous oxide is also commonly used as a catalyst for the synthesis of organic compounds.

The price of cuprous oxide Cu2O powder

The price of cuprous oxide Cu2O powder varies randomly with the production cost, transportation cost, international situation, exchange rate, and the supply and demand relationship of the cuprous oxide Cu2O powder market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for cuprous oxide Cu2O powder material, please feel free to contact to get the latest price of cuprous oxide Cu2O powder.

Suppliers of cuprous oxide Cu2O powder

As a global supplier of cuprous oxide Cu2O powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.