Preparation And Biochemical Performance Investigation Of Highly Active Hollow Cu₂O

With the increasing emphasis on health awareness and environment,highly sensitive medical sensors and antibacterial products gradually become people's choices and needs.The metal compound Cu₂O has unique optical,electrical,catalytic and antibacterial properties,and has wide application values in biological drug loading,catalysts,glucose sensors and antibacterial agents.Therefore,it has important research value to prepare high activity Cu₂O materials and apply them in the fields of biology and medicine.In this paper,the Cu₂O hollow structure which has highly active surface and high specific surface area was obtained by liquid-phase reduction and air-assisted oxidation.Then we used XRD,SEM,TEM and BET to explore in order to In-depth understand the hollowing process and the hollowing mechanism.Photocurrent,photocatalysis,glucose sensor and antibacterial experiments were used to test its performance.The results show that compared with the solid structure,the hollowed out structure material achieves improvements in all aspects of performance.?1?Based on the elective adsorption of polyvinylpyrrolidone to{111}crystal faces,and the difference between the activity of{111}surfaces and{100}crystal planes,we introduced the external gas into the reaction system,and controlled the gas velocity,oxygen content,and reaction time.The experimental results finally achieved the preparation of Cu₂O hollow structure,and we obtained the highly active truncated octahedral Cu₂O hollow structure containing only{111}crystal planes and the hexagonal Cu₂O hollow structure which exposes high active{110}crystal face.?2?Photocurrent and photocatalysis experiments were used to study the optical properties of the prepared samples of highly active Cu₂O.The results of photocurrent experiments showed that the hexagonal dendritic hollow structure>hexagonal dendritic solid structure>truncated octahedral hollow structure>truncated octahedral solid structure;The results of photocatalytic experiments showed that the truncated octahedral hollow structure>truncate octahedral solid structure,hexagonal dendritic hollow structure>hexagonal dendrite solid structure.The factors that affect the size of the photocurrent,including the materials,crystal surface activity,and the number of active sites.And the photocatalytic result include,in addition to the photoelectron yield,the type and size of the degradant is important.?3?The highly active Cu₂O was constructed as a sensor to study the glucose concentration detection capability.The results showed that the modified electrode had a good response to glucose,and for the same concentration of glucose solution,the detection current of the hollow structure was larger than the solid structure,indicating that the hollow structure has high sensitivity and accuracy.?4?The antibacterial properties of the prepared highly active Cu₂O are studied.The results show that the truncated octahedron has strong antibacterial properties,and the hexagonal dendritic cuprous oxide has strong bactericidal ability,and the order of antibacterial properties is:hollow structure>Solid structure.This is due to the difference in specific surface area before and after hollowed out,and the exposed crystal planes,etc..The results exhibit different surface energies:E_corners>E_edges>E_faces,E_{110}>E_{111}>E_{100},In a word,the more active sites and the higher the exposed crystal surface activity,the better the biochemical properties of Cu₂O.