Novel insight into the influence of supports on the performance of α-MnO2 catalysts for ozone-assisted VOC oxidation: A comparative study of inert and semiconductor supports, impact of operational parameters, and stability assessments

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-06-06 DOI:10.1016/j.cattod.2025.115418

Farid Jafarihaghighi, Amir Payan, Jafar Soltan

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引用次数: 0

Abstract

This study investigates the impact of different supports on the performance of α-MnO₂ in ozone-assisted catalytic oxidation of volatile organic compounds (VOCs). Two supports, ZSM-5 and SiO₂, were compared for effectiveness in removing polar (acetone) and nonpolar (toluene) VOCs. Catalysts were characterized by TGA, BET, TEM, XRD, HRTEM, XPS, EDX, and SEM analyses. Results showed that α-MnO₂/ZSM-5 achieved superior removal efficiencies (93 % acetone, 96 % toluene), attributed to the higher density of oxygen vacancies and lower Mn oxidation states facilitated by ZSM-5. Operational parameters such as relative humidity and temperature were also evaluated, demonstrating enhanced catalyst stability and performance in humid conditions. α-MnO₂/ZSM-5 exhibited minimal deactivation (<5 %) after 10 cycles, highlighting its potential for sustainable air purification applications.

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载体对臭氧辅助VOC氧化α-MnO2催化剂性能影响的新见解：惰性和半导体载体的比较研究，操作参数的影响，以及稳定性评估

研究了不同载体对臭氧催化氧化挥发性有机物（VOCs）中α- mno2性能的影响。比较了ZSM-5和SiO2两种载体去除极性（丙酮）和非极性（甲苯）VOCs的效果。对催化剂进行了TGA、BET、TEM、XRD、HRTEM、XPS、EDX、SEM等表征。结果表明，由于α-MnO2/ZSM-5具有较高的氧空位密度和较低的Mn氧化态，其对丙酮和甲苯的去除率分别为93 %和96 %。此外，还对相对湿度和温度等操作参数进行了评估，证明了催化剂在潮湿条件下的稳定性和性能有所提高。α-MnO2/ZSM-5在10次循环后表现出最小的失活（<5 %），突出了其可持续空气净化应用的潜力。

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.