Department of Physics, Sree Devi Kumari Women's College, Kuzhithurai 629163, Tamilnadu, India.
Department of Physics, Nesamony Memorial Christian College, Marthandam 629165, Tamilnadu, India.
J Photochem Photobiol B. 2020 Sep;210:111965. doi: 10.1016/j.jphotobiol.2020.111965. Epub 2020 Jul 17.
In the present study, chemical reaction method is used to synthesis zinc oxide (ZnO) nanostructures concurrently doped with tin and fluorine and investigated for the enhanced bacterial inhibition and photocatalytic degradation. The optical, structural, compositional morphological, photocatalytic and antibacterial activities of ZnO nanostructures by the influence of doping were also studied. The exciton absorption of ZnO spectrum observed at 370 nm is being blue shifted to 364 nm in doped ZnO confirms the increase in incorporation of Sn and F. As the doping levels of F and Sn are increased, the size of the nanoparticles decreases. This can be observed in the transmission electron microscopic images and XRD results. ZnO is showing the presence of spherical nanoparticles whereas doped samples showing nanosheets structures. The surface morphology of the prepared samples was once again confirmed with SEM pictures. The time-dependent photo-catalytic activities of pure and doped samples of ZnO were studied separately under irradiation of UV-visible and visible light by degradation of methylene blue. The antimicrobial and photocatalytic activities of the prepared samples increased with the increasing doping level of Sn and F. Especially, the nanomaterial was noted with better antimicrobial activity against Staphylococus aureaus and Escherichia coli respectively. This study showed the tuning capabilities by doping level of tin and flourine in ZnO nanostructures.
在本研究中，采用化学反应法同时合成了掺锡和掺氟的氧化锌（ZnO）纳米结构，并研究了其增强的抑菌和光催化降解性能。还研究了掺杂对 ZnO 纳米结构的光学、结构、组成、形貌、光催化和抑菌活性的影响。在掺杂 ZnO 中观察到 ZnO 光谱的激子吸收在 370nm 处蓝移到 364nm，这证实了 Sn 和 F 的掺入量增加。随着 F 和 Sn 的掺杂水平的增加，纳米粒子的尺寸减小。这可以在透射电子显微镜图像和 XRD 结果中观察到。ZnO 呈现出球形纳米粒子的存在，而掺杂样品则呈现出纳米片结构。用 SEM 图片再次确认了制备样品的表面形貌。分别在紫外光和可见光照射下，通过亚甲基蓝的降解，研究了纯 ZnO 和掺杂 ZnO 样品的时间依赖性光催化活性。随着 Sn 和 F 的掺杂水平的增加，制备样品的抑菌和光催化活性都有所提高。特别是，纳米材料对金黄色葡萄球菌和大肠杆菌的抑菌活性更好。本研究表明，通过掺杂 Sn 和 F 可以调节 ZnO 纳米结构的性能。
