Zhai Xiaofan, Jiang Ze, Zhang Yu, Sun Jiawen, Ju Peng, Jiang Quantong, Wang Youqiang, Duan Jizhou, Hou Baorong
CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, PR China; Institute of Marine Corrosion Protection, Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Sciences, Nanning 530007, PR China; Laoshan Laboratory, No. 168 Wenhai Road, Qingdao 266071, China; Sanya Institute of Ocean Eco-Environmental Engineering, Zhenzhou Road, Sanya 572000, PR China.
CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, PR China; Institute of Marine Corrosion Protection, Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Sciences, Nanning 530007, PR China; School of Mechanical Engineering, Qingdao University of Technology, Qingdao, Shandong 266520, PR China.
Ultrason Sonochem. 2024 Jan;102:106749. doi: 10.1016/j.ultsonch.2023.106749. Epub 2024 Jan 9.
Photocatalytic MoS with visible light response is considered as a promising bactericidal material owing to its non-toxicity and high antibacterial efficiency. However, photocatalysts always exist as powder, so it is difficult to settle photocatalysts on the metal surface, which limits their application in aqueous environments. To solve this problem, ultrasound and sodium dodecyl sulfate (SDS) were introduced into the co-deposition process of MoS and zinc matrix, so that novel MoS-Zn coatings were obtained. In this process, ultrasound and SDS strongly promoted the dispersion and adsorption of MoS on the co-depositing surfaces. Then MoS were proved to be composited into the Zn matrix with effective structures, and the addition of SDS effectively increased the loading content of MoS in the MoS-Zn coatings. Besides, the antibacterial performance of the MoS-Zn coatings was evaluated with three typical fouling bacteria E.coli, S.aureus and B.wiedmannii. The MoS-Zn coating showed high and broad-spectrum antibacterial properties with over 98 % inhibition rate against these three bacteria. Furthermore, it is proved that the MoS-Zn coatings generated superoxide (·O) and hydroxyl radicals (·OH) under visible light, which played the dominant and subordinate roles in the antibacterial process, respectively. The MoS-Zn coatings also showed high antibacterial stability after four "light-dark" cycles. According to the results of the attached bacteria, the MoS-Zn coatings were considered to effectively repel the living pelagic bacteria instead of killing the attached ones, which was highly environmentally friendly. The obtained MoS-Zn coatings were considered promising in biofilm inhibiting and marine antifouling fields.
具有可见光响应的光催化二硫化钼因其无毒且抗菌效率高而被认为是一种很有前景的杀菌材料。然而，光催化剂通常以粉末形式存在，因此难以将光催化剂沉积在金属表面，这限制了它们在水环境中的应用。为了解决这个问题，将超声波和十二烷基硫酸钠（SDS）引入到二硫化钼与锌基体的共沉积过程中，从而获得了新型的二硫化钼-锌涂层。在此过程中，超声波和SDS强烈促进了二硫化钼在共沉积表面的分散和吸附。然后证明二硫化钼以有效的结构复合到锌基体中，并且SDS的加入有效地增加了二硫化钼-锌涂层中二硫化钼的负载量。此外，用三种典型的污损细菌大肠杆菌、金黄色葡萄球菌和魏氏芽孢杆菌评估了二硫化钼-锌涂层的抗菌性能。二硫化钼-锌涂层对这三种细菌的抑制率超过98%，表现出高广谱抗菌性能。此外，证明二硫化钼-锌涂层在可见光下产生超氧阴离子（·O）和羟基自由基（·OH），它们在抗菌过程中分别起主导和次要作用。经过四个“光-暗”循环后，二硫化钼-锌涂层也表现出高抗菌稳定性。根据附着细菌的结果，二硫化钼-锌涂层被认为能有效排斥浮游活菌而不是杀死附着的细菌，这对环境非常友好。所获得的二硫化钼-锌涂层在生物膜抑制和海洋防污领域被认为具有广阔前景。
