Preparation And Mechanism Of Multi-element Doped TiO₂ Nano Antifouling And Antibacterial Materials

In recent years,infections caused by bacteria,viruses and other microorganisms in the environment have seriously threatened people’s health.Therefore,the development of green and environmentally friendly antifouling and antibacterial materials has broad application prospects.TiO₂ is an inexpensive and readily available material with broad-spectrum antibacterial potential.The study found that the doping of metal elements can change the forbidden band width of TiO₂ material,improve the photocatalytic activity of TiO₂ and synergize with the properties of metal ions themselves.On the other hand,nanostructures found on the surface of organisms such as cicada wings have natural antibacterial functions.Therefore,the preparation of TiO₂ materials with biomimetic nanostructures and synergistic doping of metal elements can improve their antibacterial properties and achieve green and environmentally friendly antifouling and antibacterial functions.In this work,rutile-type titania nanoarrays（F-TDNA、F-TiO₂）were synthesized by a one-step hydrothermal method.The microscopic morphology,crystal structure,elemental composition,hydrophilicity and hydrophobicity of the nanomaterials were characterized by XRD,SEM,and EDS water contact angle measuring instrument.The experimental results show that with the increase of reaction time and titanium source,the diameter of the TiO₂ nanoarray increases,and the tip changes from a fine needle-like structure to a rod-like structure,showing hydrophilicity.In this work,rutile-type titania nanoarrays（F-TDNA）were synthesized by a one-step hydrothermal method.The microscopic morphology,crystal structure,elemental composition,hydrophilicity and hydrophobicity of the nanomaterials were characterized by XRD,SEM,and EDS water contact angle measuring instrument.The experimental results show that with the increase of reaction time and titanium source,the diameter of the F-TDNA nanoarray increases,and the tip changes from a fine needle-like structure to a rod-like structure,showing hydrophilicity.The Zn-doped TiO₂ nanoarrays（F-TiO₂/Zn）are still hydrophilic rutile structures.F-TiO₂/Zn 1 has a good bacteriostatic effect on Gram,and the bacteriostatic rate is more than 75%.Compared with FTO conductive glass,the surface of F-TiO₂/Zn 1nanomaterials is less likely to be polluted by diesel.The TiO₂ nanoarrays（F-TiO₂/Cu）prepared by Cu doping are still in rutile structure.With the increase of Cu content,the width of the tip of the array changed from coarse to fine with no obvious crystalline particles,and the overall performance was hydrophilic.F-TiO₂/Cu 1 nanomaterials have good antibacterial effect on Gram bacteria,and the antibacterial rate is over 92%.Compared with FTO conductive glass,the surface of F-TiO₂/Cu 1 has better antifouling performance,not easily polluted by diesel oil,and superoleophobicity.In this study,FTO glass was used as the base material,uniform TiO₂ nanoarrays were fabricated on the surface by adjusting the reaction time and the addition amount of titanium source.By elemental doping（Zn and Cu）,the material has a better synergistic antibacterial effect.This study provides certain experimental guidance and theoretical support for the preparation of new environmentally friendly biomimetic antibacterial materials,and also provides new ideas for new antibacterial and antifouling nano-coating materials.