首页|Co3O4-Zn复合镀层制备及其模拟酶催化防污活性研究

Co3O4-Zn复合镀层制备及其模拟酶催化防污活性研究

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将具有过氧化物酶催化活性的Co3O4纳米颗粒通过电沉积的方法与锌基体共沉积获得了新型的Co3O4-Zn金属镀层,在Co3O4和锌基体的共沉积过程中引入了超声波和油酸钠,在此过程中,超声波和油酸钠有力地促进了 Co3O4在共沉积表面的分散和吸附.通过SEM、XRD、电化学测试等表征手段证明Co3O4以有效的结构复合到Zn基体中,而油酸钠的加入则有效地增加了 Co3O4-Zn镀层中Co3O4的负载量.此外,还用大肠杆菌、金黄色葡萄球菌和铜绿假单胞菌3种典型污损细菌评估了Co3O4-Zn镀层的抗菌性能.Co3O4-Zn镀层对这3种细菌的抑制率超过98％,显示出高度和广谱的抗菌性能.研究还证明,Co3O4-Zn镀层在具有H2O2情况下会产生超氧自由基和羟基自由基,它们在抗菌过程中起着主导的作用.最后还对复合镀层的抗菌稳定性和耐腐蚀特性进行了验证,表明复合镀层表现出良好的抗菌稳定和耐腐蚀特点.该研究结果为模拟酶催化杀菌金属基镀层的发展提供了新的可能,也为涉海设备的防污措施提供了一种新的思路.
Preparation of Co3O4-Zn Composite Coating and Its Simulated Antifouling Activity of Enzymes Catalyst
Nanoparticles Co3O4 with peroxidase catalytic activity were co-deposited with Zn by elec-trodeposition to obtain a novel Co3O4-Zn composite coating on Q235 carbon steel.Ultrasound and sodi-um oleate(Naol)were introduced during the co-deposition of Co3O4 and Zn,which strongly promoted dis-persion and adsorption of Co3O4 on the co-deposited surface coating.The characterization by SEM and XRD revealed that Co3O4 was obviously dispersed into the Zn matrix.The addition of Naol effectively in-creased the deposited amount of Co3O4 in the Co3O4-Zn coatings.Besides,the antimicrobial performance of the Co3O4-Zn coatings was evaluated with three typical fouling bacteria,namely,Escherichia coli(E.co-li),Staphylococcus aureus(S.aureus),and Pseudomonas aeruginosa(P.aeruginosa).Results showed that the coverage of these three bacteria on Co3O4-Zn coatings decreased over 98％,illustrating that the Co3O4-Zn coatings showed high and broad-spectrum antimicrobial performance.It was also found that the Co3O4-Zn coating in the presence of hydrogen peroxide(H2O2)produced superoxide radicals(·O2)and hydroxyl radicals(·OH),which played dominant roles in the antimicrobial process.Finally,the antimi-crobial stability and corrosion resistance of the composite coatings were also verified,and it was found that the composite coatings exhibited good antimicrobial stability and corrosion resistance characteristics.The results of this study provide a new possibility for the development of bactericidal coatings of simulat-ed enzyme catalyst and a new solution for green antifouling.

Co3O4-Zn coatingultrasound assistancesimulated enzyme-catalyzed antimicrobialelectrodepositionsodium oleate

蒋泽、翟晓凡、张雨、孙佳文、蒋全通、王优强、段继周、侯保荣

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青岛理工大学机械与汽车工程学院 青岛 266520

中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室 青岛 266071

海洋科学与技术试点国家实验室(青岛)海洋腐蚀与防护开放工作室 青岛 266235

Co3O4-Zn镀层 超声辅助 模拟酶催化抗菌 电沉积 油酸钠

国家自然科学基金山东省自然科学基金青岛海洋科学与技术试点国家实验室山东省专项经费"问海计划"项目中国科协青年人才托举计划

42376204ZR2022MD0232021WHZZB2303YESS20210201

2024

10.11902/1005.4537.2023.371

中国腐蚀与防护学报
中国腐蚀与防护学会 中国科学院金属研究所

中国腐蚀与防护学报

CSTPCD北大核心
影响因子：0.819
ISSN：1005-4537
年,卷(期)：2024.44(5)