The Preparation Process And Properties Of Zn/Co Co-doped TiO₂ Nano-materials Antibacterial Ceramics

In recent years,people in the life of more and more antimicrobial materials,so a new generation of environmentally friendly titanium dioxide antibacterial ceramics came into being.In this thesis,Zn/Co co-doped TiO2 nanomaterials with good antibacterial properties were selected.The spray coating height,spraying time,pulling speed,pulling and dipping time,baking temperature And holding time antimicrobial ceramic antibacterial effect,to explore the best coating process.The prepared nanomaterials were characterized by XRD,SEM,UV-Vis-DRS and FT-IR.Phase composition and light absorption properties analysis.In the visible light irradiation conditions,the use of flask oscillation method and the antibacterial ring method of the prepared material antibacterial properties.Antibacterial properties of the prepared antimicrobial ceramic were studied by the method of film adhesion.Meanwhile,the performance of antimicrobial ceramic film was characterized by XRD and SEM,and the best antimicrobial coating technology was selected.The experimental results show that tetrabutyl titanate as precursor,anhydrous ethanol as solvent,glacial acetic acid as chelating agent,sodium dodecyl benzene sulfonate as surfactant,doped zinc nitrate and cobalt nitrate(the molar ratio is 2:1)to prepare a Zn/Co co-doped TiO2 sol with good antibacterial properties,which can be used as an antimicrobial ceramic.Zn/Co co-doped TiO2 nanometer antimicrobial ceramic was prepared by self-made ultrasonic spray pyrolysis device.The optimum spray nozzle height was 5 cm from the ceramic substrate,and the best coating layer was two layers.SEM image analysis and antibacterial experiments show that under these conditions,the film is even without cracking,and the antibacterial rate is the highest.The best roasting temperature of ceramic in muffle furnace is 600℃,the best heat preservation time is 2 h,the film forming effect is best and the antimicrobial rate is the highest.Ultrasonic spray pyrolysis method of the best preparation process anti-bacterial ceramic has a strong stain resistance,anti-natural erosion of water slightly decreased.The Zn/Co co-doped TiO2 nanometer antimicrobial ceramic was prepared by dipping and pulling method,and the pulling speed was 200 μ m/s.When the pulling and dipping time was 200 s,the optimum coating thickness was obtained.Covering the time and the number of layers will make the photocatalytic material is covered,there is uneven film and the antimicrobial rate decreased.The optimum calcination temperature of ceramics in muffle furnace is 600℃.At 600℃,Zn/Co co-doped TiO2 exists in photocatalytic anatase type,and the highest antibacterial rate is found.Antibacterial ceramic has better fouling resistance under the best preparation technology of dipping and pulling method,but it is not ideal to resist the erosion of natural water,which is related to the film solidification by dipping and pulling method.