TY  - JOUR
AU  - Ma, Yuan
AU  - Li, Tong
AU  - Zhao, Si-Rui
AU  - Feng, Zhou-Tao
AU  - Liu, Jin-Ku
PY  - 2025
TI  - Design synthesis and synergistic anticorrosion performance of ZIF-8/NiAl LDH heterojunction nanocontainers
JO  - Nano Research
SN  - 1998-0124
SP  - 94907000
VL  - 18
IS  - 1
AB  - This study introduces a novel relay and synergistic anti-corrosion mechanisms by constructing an active anticorrosive coating with nanocontainers through the combination of zinc-based zeolitic imidazolate framework materials (ZIF-8) and layered double hydroxides loaded with molybdate anions (MoO42− LDHs). The incorporation of ZIF-8 provided the material with abundant surface nano-micropores, enhancing its adsorption capacity for corrosive ions such as OH− and Cl−. Simultaneously, this adsorption enabled the ZIF-8-loaded NiAl-MoO42− LDH to receive signals induced by Cl− stimulation or pH changes. After receiving the signals, the corrosion inhibitor MoO42− encapsulated within the NiAl-MoO42− LDH was released responsively and exchanged with Cl−. The released MoO42− from nanocontainers adsorbed onto localized corrosion sites, forming a passivation film, thereby blocking the diffusion path of Cl−. Additionally, this study demonstrated that the self-assembly of ZIF-8 effectively reduced the hydrophilicity of LDH and enhanced the resistance of coating to permeability. Through supramolecular interactions between LDH hydroxyl groups, metal-organic framework (MOF) functional groups and organic epoxy resin, the cross-linking of the coating and the interfacial compatibility of the materials were significantly improved. The Z-type heterojunction composed of nickel-based LDH and metal organic frameworks not only increased the specific surface area and capacitance performance but also provided photo-induced cathodic protection for metal substrates with matched bandgaps. The experimental results showed that the impedance properties of the ZIF-8/NiAl-MoO42− LDH coatings were 28.43 times of pure epoxy after 168 h. This work can provide new insights and assistance for the study of anti-corrosion mechanisms.
UR  - https://doi.org/10.26599/NR.2025.94907000
DO  - 10.26599/NR.2025.94907000