Synthesis, Characterization, and Electrochemical Properties of La-Doped α-Fe2O3 Nanoparticles

被引：3
|
作者：
Wang, Hewei [1 ]
Shi, Peiyang [1 ]
Ning, Junxiang [1 ]
机构：
[1] Northeastern Univ, Sch Met, Key Lab Ecol Met Multimetall Ores, Minist Educ, Shenyang 110819, Peoples R China
来源：
NANOMATERIALS | 2022年 / 12卷 / 19期
关键词：
pH value; La-doped alpha-Fe2O3 nanoparticle; electrochemical stability; corrosion resistance; IRON-OXIDE; PERFORMANCE; COATINGS; BIFEO3;
D O I：
10.3390/nano12193346
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
La-doped alpha-Fe2O3 nanoparticles were synthesized by a hydrothermal method. The effects of pH value on the morphology, structure, and electrochemical stability of the La-doped alpha-Fe2O3 nanoparticles were investigated by X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectrum, and electrochemical methods. The results show that the La-doped alpha-Fe2O3 nanoparticles exhibit a uniform spherical morphology at pH = 6, and are agglomerated with a poor dispersion at pH = 4 and 8. The iron oxide lattice is distorted by the La-doping, which increases the Fe-O bond strength. The decreased Fe-O bond length and the increased Fe-O bond energy at pH = 6 improve the electrochemical stability of alpha-Fe2O3. The waterborne coating modified with La-doped alpha-Fe2O3 nanoparticles exhibits a steady corrosion resistance.
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页数：14
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