MEI Chunxia, YANG Yuxin, ZHANG Yiwei, et al. Stability evolution of CeO₂ nanoparticles in hydrogen peroxide–chelating agent systems[J/OL]. CIESC Journal, 2026.
DOI:
MEI Chunxia, YANG Yuxin, ZHANG Yiwei, et al. Stability evolution of CeO₂ nanoparticles in hydrogen peroxide–chelating agent systems[J/OL]. CIESC Journal, 2026.DOI: 10.11949/0438-1157.20260475.
Stability evolution of CeO₂ nanoparticles in hydrogen peroxide–chelating agent systems
纳米颗粒粒径与Zeta电位的时间演化,并结合透射电子显微镜(Transmission Electron Microscope,TEM)、X射线光电子能谱(X-ray Photoelectron Spectroscopy,XPS)和电子顺磁共振(Electron Paramagnetic Resonance,EPR)表征分析其表面价态特征与缺陷特征的变化。结果表明,过氧化氢诱导的表面电荷重构主导了CeO
2
纳米颗粒的聚集行为,而螯合剂与过氧化氢的共同作用可在不显著改变体相结构的前提下显著提升CeO
2
的胶体稳定性。本研究揭示了CeO
2
纳米颗粒在过氧化氢-螯合剂体系中的稳定性调控机制,为其在催化与高级氧化反应中的应用提供了参考。
Abstract
Cerium oxide(CeO
2
) nanoparticles are widely used in hydrogen peroxide activation and catalytic systems; however
their stabil
ity and surface chemical evolution under complex reaction environments remain insufficiently understood. In this study
the time-dependent evolution of particle size and zeta potential of CeO
2
nanoparticles was systematically investigated under different hydrogen peroxide concentrations
stirring speeds
and in the presence of chelating agents(ethylene diamine tetraacetic acid and ascorbic acid). Transmission electron microscope(TEM)
X-ray photoelectron spectroscopy(XPS)
and electron paramagnetic resonance(EPR) were employed to analyse the corresponding changes in surface valence states and defect characteristics. The results demonstrate that hydrogen peroxide–induced surface charge reconstruction plays a dominant role in governing the aggregation behaviour of CeO
2
nanoparticles
whereas the synergistic interaction between chelating agents and hydrogen peroxide significantly enhances colloidal stability without inducing pronounced changes in the bulk crystal structure. This study elucidates the stability regulation mechanism of CeO
2
nanoparticles in hydrogen peroxide-chelating agent systems and provides insights for their rational application in catalytic and advanced oxidation processes.
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references
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