Constructing Ce–Mn/Al2O3 with different active components for low temperature catalytic degradation of chlorobenzene in soil

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED Journal of Rare Earths Pub Date : 2023-11-10 DOI:10.1016/j.jre.2023.10.016

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Abstract

Soil remediation containing numerous organic contaminants is of great significance to ecological environment. Herein, the synergetic effects of Ce–Mn/Al₂O₃ with different active components on catalytic thermal desorption of chlorobenzene in soil were investigated. The optimized Ce–Mn/Al₂O₃ drastically enhance the desorption efficiency of chlorobenzene, and the corresponding conversion reaches 100% within 1 h at a low temperature of 120 °C. The superior performance is ascribed to the formation of Ce–Mn solid solution during the calcination process, resulting in a certain lattice change to the generation of abundant oxygen vacancies and acidic sites. Combining with the analysis of in-situ diffuse reflectance infrared spectroscopy and gas chromatography-mass spectrometry, the final products of chlorobenzene are decomposed into CO₂, H₂O, Cl₂ and HCl. This work sheds light on the rational design of highly-active catalysts for practical applications of sustainable soil remediation.

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构建含有不同活性成分的 Ce-Mn/Al2O3 以低温催化降解土壤中的氯苯

含有大量有机污染物的土壤修复对生态环境意义重大。本文研究了含有不同活性组分的 Ce-Mn/Al2O3 对土壤中氯苯催化热脱附的协同效应。优化后的 Ce-Mn/Al2O3 显著提高了氯苯的解吸效率，在 120 ℃ 的低温条件下，1 小时内相应的转化率达到 100%。卓越的性能归功于煅烧过程中形成的 Ce-Mn 固溶体，其晶格发生了一定的变化，产生了丰富的氧空位和酸性位点。结合原位漫反射红外光谱和气相色谱-质谱分析，氯苯的最终产物分解为 CO2、H2O、Cl2 和 HCl。这项研究揭示了如何合理设计高活性催化剂，用于可持续土壤修复的实际应用。

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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.