Pulvirenti Luca, Lombardo Cinzia, Salmeri Mario, Bongiorno Corrado, Mannino Giovanni, Lo Presti Francesca, Cambria Maria Teresa, Condorelli Guglielmo Guido
Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale Andrea Doria 6, 95125, Catania, Italy.
Dipartimento di Scienze Biomediche e Biotecnologiche, Università degli Studi di Catania, Via S. Sofia 97, 95125, Catania, Italy.
Discov Nano. 2023 Sep 11;18(1):113. doi: 10.1186/s11671-023-03883-9.
In this paper, we report on the synthesis of a new hybrid photocatalytic material activated by natural sunlight irradiation. The material consists of multiferroic nanoparticles of bismuth ferrite (BFO) modified through the growth of the Fe-based MIL-101 framework. Material characterization, conducted using various techniques (X-ray diffraction, transmission electron microscopy, FTIR, and X-ray photoelectron spectroscopies), confirmed the growth of the MIL-101 metal-organic framework on the BFO surface. The obtained system possesses the intrinsic photo-degradative properties of BFO nanoparticles significantly enhanced by the presence of MIL-101. The photocatalytic activity of this material was tested in antibacterial experiments conducted under natural sunlight exposure within the nanocomposite concentration range of 100-0.20 µg/ml. The MIL-modified BFO showed a significant decrease in both Minimum Inhibiting Concentration and Minimum Bactericide Concentration values compared to bare nanoparticles. This confirms the photo-activating effect of the MIL-101 modification. In particular, they show an increased antimicrobial activity against the tested Gram-positive species and the ability to begin to inhibit the growth of the four Escherichia coli strains, although at the maximum concentration tested. These results suggest that the new nanocomposite BiFeO@MOF has been successfully developed and has proven to be an effective antibacterial agent against a wide range of microorganisms and a potential candidate in disinfection processes.
在本文中，我们报道了一种通过自然阳光照射激活的新型混合光催化材料的合成。该材料由通过铁基金属有机框架MIL-101的生长改性的铋铁氧体（BFO）多铁性纳米颗粒组成。使用各种技术（X射线衍射、透射电子显微镜、傅里叶变换红外光谱和X射线光电子能谱）进行的材料表征证实了MIL-101金属有机框架在BFO表面的生长。所获得的体系具有BFO纳米颗粒的固有光降解特性，MIL-101的存在显著增强了这种特性。在自然阳光照射下进行的抗菌实验中，在100 - 0.20 µg/ml的纳米复合材料浓度范围内测试了该材料的光催化活性。与裸纳米颗粒相比，MIL改性的BFO的最低抑菌浓度和最低杀菌浓度值均显著降低。这证实了MIL-101改性的光激活作用。特别是，它们对测试的革兰氏阳性菌表现出增强的抗菌活性，并且能够开始抑制四种大肠杆菌菌株的生长，尽管是在测试的最大浓度下。这些结果表明，新型纳米复合材料BiFeO@MOF已成功开发，并已被证明是一种针对多种微生物的有效抗菌剂，也是消毒过程中的潜在候选材料。
