CeO2@MnO2 with strong Ce-Mn interaction activating PDS to promote in situ degradation of adsorbed tetracycline

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2025-01-06 DOI:10.1016/j.jre.2025.01.006

Jinhui Zhang , Jiawei Sun , Xinfeng Zhu , Jingquan Liu , Linlin Chang , Guofeng Li , Rongfu Peng , Junning Wang , Libin Jiang , Kai Wang , Shiqiang Yin , Xueping Liu , Chaohai Wang

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Abstract

A series of CeO₂@MnO₂ composites was prepared by deposition–precipitation methods. These materials were used to activate sodium persulfate (PDS) for the oxidation of tetracycline. It is found that the composites, especially the CeO₂@MnO₂-1:4 composites, exhibit better tetracycline removal rates than the pure components. X-ray diffraction (XRD), Raman and scanning electron microscopy (SEM) analyses all indicate that the composite has been successfully prepared with high purity and high crystalline. The XPS analysis shows that the strong interaction between the components promotes the electron transfer. Additionally, the kinetic rate constants of CeO₂@MnO₂-1:4 after 60 min are 3.8 and 12.7 times higher than pure CeO₂ and MnO₂, respectively. CeO₂@MnO₂-1:4 composite also exhibits excellent catalytic activity for individual and hybrid pollutants. The effects of wastewater matrix, pH, circulation and ion strength on the degradation of tetracycline were investigated. It is found that CeO₂@MnO₂-1:4 composite has good practical application prospects. CeO₂@MnO₂ composites with synergistic adsorption catalysis can activate PDS and peroxymonosulfate (PMS) for efficient organic catalytic oxidation. This paper provides the theoretical basis and data support for the practical application of the CeO₂@MnO₂ composite materials.

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CeO2@MnO2具有强Ce-Mn相互作用，激活PDS，促进吸附四环素的原位降解

采用沉积-沉淀法制备了一系列CeO2@MnO2复合材料。这些材料被用来激活过硫酸钠（PDS）氧化四环素。结果表明，复合材料，特别是CeO2@MnO2-1:4复合材料，对四环素的去除率优于纯组分。x射线衍射（XRD）、拉曼光谱（Raman）和扫描电镜（SEM）分析均表明该复合材料具有高纯度、高结晶度的特点。XPS分析表明，组分之间的强相互作用促进了电子的转移。此外，CeO2@MnO2-1:4在60 min后的动力学速率常数分别是纯CeO2和MnO2的3.8倍和12.7倍。CeO2@MnO2-1:4复合材料对单个和混合污染物也表现出优异的催化活性。考察了废水基质、pH、循环和离子强度对四环素降解的影响。发现CeO2@MnO2-1:4复合材料具有良好的实际应用前景。CeO2@MnO2复合材料具有协同吸附催化作用，可以激活PDS和过氧单硫酸根（PMS）进行高效的有机催化氧化。本文为CeO2@MnO2复合材料的实际应用提供了理论依据和数据支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.