GO-Ti3C2 two-dimensional heterojunction nanomaterial for anticorrosion enhancement of epoxy zinc-rich coatings

被引：130
作者：
Shen, Lu [1 ]
Zhao, Wenjie [2 ]
Wang, Kui [1 ]
Xu, Jianguang [1 ]
机构：
[1] Yancheng Inst Technol, Sch Mat Sci & Engn, Yancheng 224051, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Ningbo 315201, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2021年 / 417卷
关键词：
Heterojunction nanomaterial; GO-Ti3C2; Epoxy zinc-rich coating; Synergistic enhancement; TI3C2 MXENE NANOSHEETS; CORROSION PROTECTION; GRAPHENE OXIDE; POWDER COATINGS; PERFORMANCE; NANOCOMPOSITE; CONCRETE; COMPOSITES; GRAPHITE; BEHAVIOR;
D O I：
10.1016/j.jhazmat.2021.126048
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
MXenes are a unique family of two-dimensional (2D) transition metal carbides and/or nitrides, which have been proven useful for energy storage, water purification, and biomedical applications. Herein, a kind of heterojunction structure was designed by grafting highly conductive MXene (Ti3C2) on the graphene oxide (GO) nanosheets, which was confirmed by Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectronic spectroscopy (XPS) and Raman results. Open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and salt spray measurements corroborated that inclusion of 0.5 wt% Ti3C2 or GO-Ti3C2 into epoxy zinc-rich coating (ZRC) effectively enhance the cathodic protection capability. Additionally, superior corrosion resistance was achieved by incorporation of GO-Ti3C2 into ZRC since GO-Ti3C2 in the coating improved the utilization rate of zinc particles and GO provided barrier protection for inhibiting the diffusion of corrosive agents. At the end of immersion, Rc value of ZRC/GO-Ti3C2 coating was 3.047 & times; 104 omega & sdot;cm2, which was one order of magnitude higher than that of ZRC coating. Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) measurements demonstrated that ZRC/GO-Ti3C2 coating exhibited lower speed of zinc particles oxidation and intact steel substrate. Hence, ZRC/GO-Ti3C2 coating exhibited the optimal corrosion resistance among the four kinds of coatings.
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页数：14
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