Ye Chen, Tian Qichen, She Yuanbin, Zhu Yangguang, Dai Dan, Wu Mengfan, Yan Qingwei, Chu Wubo, Cai Tao, Gui Xuchun, Yu Jinhong, Li He, Jiang Nan, Zhao Wenjie, Huang Liang-Feng, Fu Li, Lin Cheng-Te
Qianwan Institute, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, PR China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China; Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, PR China.
Qianwan Institute, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, PR China; College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China.
J Colloid Interface Sci. 2025 Feb;679(Pt A):1016-1025. doi: 10.1016/j.jcis.2024.10.043. Epub 2024 Oct 10.
In this study, an economic and controllable Marangoni self-assembly approach is designed to prepare the heterostructured nanocoatings (8-28 nm) consisting of alternately stacked mosaic nanosheets of hexagonal boron nitride (h-BN) and graphene. The resulting 2D nanocoatings exhibit a combination of advantageous properties, such as prevention of interfacial reactions, robust interfacial binding, a labyrinthine barrier effect, inhibition of galvanic corrosion, and alleviation of internal stress. The protective property of graphene/h-BN heterostructured nanocoatings is studied through potentiodynamic polarization curves and electrochemical impedance spectroscopy, with the theoretical support of first-principles calculations. The corrosion current density of ≈28 nm-thick graphene/h-BN multilayer coated stainless steel is 1.82 × 10 A cm, which decreases by an order of magnitude compared to that of an uncoated one, meanwhile, the corrosion potential increases from -0.192 to 0.023 V (increase: ≈0.215 V). The enhancement of anticorrosion performance of heterostructured nanocoatings can be attributed to the labyrinth barrier effect associated with highly ordered horizontal arrangement, effective coverage of metal substrates by mosaic multilayers, and suppressed galvanic corrosion effect by insulating BNNS monolayers. This study can shed much light on the effective solution of many stubborn issues confronted by the development of anticorrosive 2D nanocoatings.
在本研究中，设计了一种经济且可控的马兰戈尼自组装方法来制备由交替堆叠的六方氮化硼（h-BN）和石墨烯镶嵌纳米片组成的异质结构纳米涂层（8 - 28纳米）。所得的二维纳米涂层展现出多种有利性能的组合，如防止界面反应、强大的界面结合力、迷宫式阻挡效应、抑制电偶腐蚀以及缓解内应力。通过动电位极化曲线和电化学阻抗谱研究了石墨烯/h-BN异质结构纳米涂层的防护性能，并得到了第一性原理计算的理论支持。厚度约为28纳米的石墨烯/h-BN多层涂层不锈钢的腐蚀电流密度为1.82×10 A/cm，与未涂层的相比降低了一个数量级，同时，腐蚀电位从 -0.192 V增加到0.023 V（增加约0.215 V）。异质结构纳米涂层防腐性能的增强可归因于与高度有序水平排列相关的迷宫式阻挡效应、镶嵌多层对金属基底的有效覆盖以及绝缘BNNS单层对电偶腐蚀效应的抑制。本研究可为解决防腐二维纳米涂层发展中面临的许多棘手问题提供诸多启示。
