Antibacterial Nano-metal Oxide Materials Preparation And Antibacterial Properties

People are increasingly attending on sterilization and disinfection of home and common environment with the improvement of living standard. The development and exploitation of new model antibacterial materials have become one of the interesting points of researches. Inorganic antibacterial material has received much attention because of such advantages as broad-spectrum, long effect, safety, high-temperature resistance, and low-pollution. At present, the research mostly focuses on aspect of silver and titanium dioxide photocatalysis antibacterial material, while there is not much research in nanometer metal compound oxide antibacterial material. Hydrotalcite and hydrotalcite-like compounds may be precursors of inorganic-inorganic, inorganic-organic nanometer compound material, as it is one kind of peculiar nanometer structure. As a result, hydrotalcite and hydrotalcite-like is one of the effective methods for preparing nanometer metal compound oxide.The paper consists of four chapters: The first chapter introduces the type, the application and the test method of antibacterial performance of antibacterial material. The second chapter firstly introduces the progresses of hydrotalcite-like compounds. A series of nanometer Zn/Al, Zn/Mg/Al, Ca/Al compound oxides are prepared from the calcinations of the precursors of the hydrotalcite-like compounds. Various measuring methods, such as BET, XRD, DSC, FT-IR, SEM, are used to perform the studies of those samples. The results reveal that they are single crystal shape, smaller particle size, higher surface area. At last, the compound oxides antibacterial activities on bacillus subtilis and staphylococcus aureus are carried out by cup-dish measure. The results show that the compound oxides are effective antibacterial agents. They are colorless and nonpoisonous, so they have prospering application prospect of home and common environment sterilization. The third and fourth chapters report the relation of antibacterial property of the zinc oxide and the magnesia with their grain diameter. The results show that antibacterial properties of the zinc oxide and the magnesia are increasingly toned up with their grain diameter trailed off.