Ordinary copper oxide is mainly used for the determination of carbon in gas analysis, and is also a catalyst commonly used in organic reactions and a raw material for preparing other copper compounds in an inorganic reaction. The particle size of nano-copper oxide is in the range of 1 to 100 nm. The particles of this size are in the transition region between macroscopic objects and microscopic particles, so they have volume effect, quantum size effect, surface effect and macroscopic quantum tunneling effect, so that light absorption , magnetic properties, thermal resistance, catalyst, chemical activity and melting point all exhibit special physicochemical properties different from ordinary copper oxide. As a new type of important functional material, it also has a good application prospect in biomedicine, sensors, catalytic materials and environmental management. The commonly used method for preparing nanometer copper oxide powder is mainly liquid phase method and solid phase method. While ensuring the preparation of good performance nanometer copper oxide powder, it is also necessary to ensure that the selected preparation process is simple and easy to operate. The preparation methods of copper oxide powder and its application research status are reviewed. The liquid phase method is currently the most widely used method for preparing nano-copper oxide powder in the laboratory and industry. Compared with the solid phase method, various purification methods can be utilized in the reaction process. The general preparation step is to select one or more soluble copper salts, and prepare a solution according to the prepared material composition, so that each element is in an ionic or molecular state, and then select a suitable precipitant or use evaporation, sublimation, hydrolysis. Waiting for the operation, the copper ions are uniformly precipitated or crystallized, and finally the nano-copper oxide powder is obtained by heat treatment of precipitation or crystallization. According to the different preparation processes, the liquid phase method is further divided into a precipitation method, a hydrothermal method, a microemulsion method, a sol-gel method, and an electrochemical method.
Preparation and application of nano copper oxide powder