Doubly Doped Mg-Al-V2O74– Layered Double Hydroxide/Mo2CTx MXene Nanosheet Composites for Wear- and Corrosion-Resistant Coatings
Doubly Doped Mg-Al-V2O74– Layered Double Hydroxide/Mo2CTx MXene Nanosheet Composites for Wear- and Corrosion-Resistant Coatings
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DOI：
10.1021/acsanm.3c02276
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发表时间：
2023-07
影响因子：
5.9
通讯作者：
Xinfang Zhang;Changqing Yin;Shupei Liu;D. Cong;Zhongsheng Li;Jiao Wang;Tao Sun;Xiaoying Liu-Xiaoying
中科院分区：
文献类型：
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作者：
Xinfang Zhang;Changqing Yin;Shupei Liu;D. Cong;Zhongsheng Li;Jiao Wang;Tao Sun;Xiaoying Liu-Xiaoying
二维（2D）纳米材料已被证明在保护金属免受腐蚀和磨损方面具有潜在的应用。然而，它仍然是一个挑战，在纳米复合材料涂层中的二维纳米片的容易团聚和复杂的功能化。采用掺杂-静电协同组装法制备了Co掺杂的MgAl-V2 O 74-层状双氢氧化物（LDH）-过渡金属碳化物（Mo 2CTx）纳米片复合材料（CV-LDH-MXene）。在逐层组装后，纳米片复合涂层的厚度为-6.9 μm。结果表明，与纯LDH涂层相比，加入CV-LDH-MXene纳米复合涂层后，在10- 2 Hz下的阻抗值提高了1个数量级，腐蚀电流密度降低了约30倍。摩擦试验结果表明，CV-LDH-MXene纳米片复合材料的摩擦系数在磨合期后保持在0.09左右，表现出优异的相对稳定性和耐磨性。这些现象证实了V2 O 74插层和层组装Mo 2CTxMXene之间存在协同效应，从而获得稳定的耐腐蚀和磨损特性。这项研究证明了LDH和MXene纳米片的创造具有重大意义，并在防腐和耐磨应用方面迈出了巨大的一步。特别是推进航海仪器、水下武器、海水电池在造船业和海洋工程中的应用。
Two-dimensional (2D) nanomaterials have proven that potential applications in protecting metals from corrosion and wear. However, it remains a challenge in easy agglomeration and complex functionalization of 2D nanosheets in nanocomposite coatings. Herein, Co-doped MgAl-V2O74–layered double hydroxide (LDH) with transition metal carbide (Mo2CTx) nanosheet composites (CV-LDH-MXene) was synthesized by using a doping-electrostatic synergistic assembly strategy. After layer-by-layer assembly, nanosheet composite coatings had thicknesses of −6.9 μm. The corrosion results show that the incorporation of the CV-LDH-MXene nanocomposite coating can increase impedance at 10–2Hz by 1 order of magnitude compared to pure LDH coating and decrease the corrosion current density by ∼30-fold. Furthermore, the friction results claimed that the CV-LDH-MXene nanosheet composites could make the coefficient of friction maintain at 0.09 after the running-in period, which displayed excellent relatively stable and anti-wear properties. These phenomena confirmed that there existed a synergistic effect of V2O74–intercalation and layer-assembled Mo2CTxMXene, which achieved stable anti-corrosion and wear characteristics. This investigation proved a substantial significance for the creation of LDH and MXene nanosheets and a giant step forward in the application of anti-corrosion and anti-wear. In particular, we promote the application of nautical instruments, underwater weapons, and seawater batteries in the shipbuilding industry and marine engineering.