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鐵電材料催化抗菌研究進展

Research progress on ferroelectric catalytic materials for antimicrobials

  • 摘要: 研究和發展抗菌技術對保障人類的生命健康至關重要. 鐵電材料是具有自發極化,且自發極化能夠被外電場所轉向的一類材料. 在外加場的刺激下,鐵電材料內部電偶極子的有序排列被打破,表面的束縛電荷重新分布,被釋放的正負電荷與周圍介質中的氧氣和水發生反應,生成具有強氧化性的活性物質(如·OH, \cdot \textO_2^ - )來滅活細菌. 結合鐵電材料具備良好的壓電、熱釋電及光伏性質,以及響應快(10?6 s)、機電耦合系數高的獨特優勢,與催化技術相結合已發展成為一種新興的滅菌技術. 本綜述從鐵電材料的壓電催化抗菌、熱釋電催化抗菌及光催化抗菌三個方面,對前人報道的關于鐵電材料催化抗菌的工作進行了總結梳理,并分別闡述了鐵電材料在不同類型催化過程中的抗菌機制.

     

    Abstract: Research and development of antimicrobial technology are critical for safeguarding human life and health. Ferroelectric materials, materials with spontaneous polarization, can adjust their direction of spontaneous polarization in response to an external electric field. When subjected to this applied field, the ordered arrangement of electric dipoles within the ferroelectric material becomes disrupted. This disruption causes the bound charges on the surface to redistribute, and the released positive and negative charges react with the oxygen and water in the surrounding medium. This reaction forms active substances with powerful oxidant properties (such as OH, \cdot \textO_2^ - ). These highly oxidizing active substances can destroy the cell wall of bacterial cells, enter the cell to damage DNA, leak proteins, and render them inactive, thereby inactivating the bacteria. Ferroelectric materials are not only excellent for their piezoelectric, pyroelectric, and photovoltaic properties but also possess the unique ability to convert mechanical, thermal, and optical energy in nature into electrical and chemical energy. Coupled with their fast response speed (10?6 s) and high electromechanical coupling coefficients, the development of ferroelectric materials in conjunction with catalytic technology has emerged as a new sterilization technique. However, achieving high antimicrobial efficiencies is closely related to carrier utilization in the catalytic process and the catalyst activity. This holds true regardless of whether mechanical, thermal, or optical energy is used as the driving source to stimulate ferroelectric materials for catalytic antimicrobials. When using ferroelectric materials as catalysts, the spontaneous polarization properties of these materials can be harnessed to reduce the electron–hole pair combination rate through the internal electric field. This action increases the yield of active substances, thereby improving the efficiency of catalytic antibacterial agents. In addition, high-performance ferroelectric materials have a high internal electric field potential after polarization treatment, which can accelerate carrier separation during the catalytic process. As a result, ferroelectric materials have great potential for catalytic antimicrobial applications under environmentally friendly and safe conditions. In this review, we begin with an introduction to the ferroelectric properties of these materials and their relationship with piezoelectric and pyroelectric materials. We then summarize and organize previous work reported on the catalytic antimicrobial properties of ferroelectric materials. This summary includes discussions on photocatalytic, piezocatalytic, and pyrocatalytic antimicrobial properties and descriptions of the antimicrobial mechanisms of ferroelectric materials in different types of catalytic processes. The aim is to provide a reference for future research into the catalytic antimicrobial properties of ferroelectric materials.

     

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