A novel approach combining atomic layer deposition (ALD) and photodeposition was proposed to prepare stable and antibacterial organic–inorganic composited membrane. These composited membranes were fabricated by atomic-scale coating of titanium on the surface of a commercial polyvinylidene fluoride (PVDF) membrane under vacuum, followed by Au photosensitization under ultraviolet (UV) irradiation. Thus, as-prepared Au-TiO₂/PVDF composite membrane could exhibit similar mechanical stability and separation performance as pristine PVDF membrane because of chemisorbing between PVDF and TiO₂. We have studied the antibacterial mechanism of increasing surface hydrophilicity to prevent bacterial adhesion and cytotoxic reactive oxygen sterilization. The results showed that light-induced reactive oxygen species dominate the antibacterial process. Additionally, Au-TiO₂/PVDF composite membranes have potential degradation ability of dye, such as trace methyl orange in aqueous solution. Our present approach demonstrates great potential for the controllable preparation of inorganic modification on inert organic surface with different compositions and shapes for various applications.

提出了一种结合原子层沉积（ALD）和光沉积的新颖方法来制备稳定且抗菌的有机-无机复合膜。这些复合膜是通过在真空下在商业化的聚偏二氟乙烯（PVDF）膜的表面上原子级涂覆钛，然后在紫外线（UV）辐照下进行Au光敏化而制成的。因此，由于PVDF和TiO ₂之间的化学吸附，制备的Au-TiO ₂ / PVDF复合膜可以表现出与原始PVDF膜相似的机械稳定性和分离性能。。我们已经研究了增加表面亲水性以防止细菌粘附和细胞毒性活性氧灭菌的抗菌机制。结果表明，光诱导的活性氧占主导地位的抗菌过程。另外，Au-TiO ₂ / PVDF复合膜具有潜在的染料降解能力，例如水溶液中的痕量甲基橙。我们目前的方法证明了可控地制备具有不同组成和形状的惰性有机表面上的无机改性剂的巨大潜力，以用于各种应用。