Degradation of toluene by DBD plasma catalytic technology with CoMn-BTC/ Ti3C2Tx composites

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-02-20 DOI:10.1016/j.apcata.2025.120180

Yucheng Liu , Xinzhi Zang , Songjian Zhao , Zixuan Wang , Wenqiang Wang , Jingxin Xu , Sheng Wang , Zhaolian Ye

{"title":"Degradation of toluene by DBD plasma catalytic technology with CoMn-BTC/ Ti3C2Tx composites","authors":"Yucheng Liu , Xinzhi Zang , Songjian Zhao , Zixuan Wang , Wenqiang Wang , Jingxin Xu , Sheng Wang , Zhaolian Ye","doi":"10.1016/j.apcata.2025.120180","DOIUrl":null,"url":null,"abstract":"<div><div>Dielectric barrier discharge (DBD) plasma catalytic technology is considered as one of the most effective methods for elimination of diluted volatile organic compounds (VOCs) due to its advantages of high efficiency, low cost, and wide applicability. The design of highly efficient catalytic materials is a notable challenge for this technology. In this study, Ti3C2Tx, GO, and NiMn2O4, which possess a large specific surface area and high electron transport properties, were introduced as catalyst supports. These materials were combined with CoMn-BTC to synthesize three types of supported composite catalysts, which were used for the DBD-assisted VOCs degradation. Characterization analyses, including XRD, FTIR and SEM, indicated that CoMn-BTC was successfully integrated with the three supports. The large specific surface area and more oxygen vacancy for CoMn-BTC/Ti3C2Tx than bulk CoMn-BTC explained the enhanced toluene removal efficiency and mineralization, CO2 selectivity, along with suppression of undesirable O3 and NOx. Characterization of CoMn-BTC/Ti3C2Tx catalysts before and after the plasma catalytic process indicated that high adsorbed oxygen species and the redox cycles between Co3 +/Co2+ and Mn2+/(Mn4+, Mn3+) species can effectively promote toluene and intermediates oxidation. Furthermore, GC-MS analysis of the organic by-products in the effluent gas revealed that the amounts of intermediates such as nitrophenol reduced in the CoMn-BTC/Ti3C2Tx compared with CoMn-BTC, further demonstrating that CoMn-BTC/Ti3C2Tx had excellent catalytic activity. At last, the possible reaction pathways of toluene degradation in plasma-catalytic system was proposed in combination with analysis results of GC-MS, optical emission spectroscopy and properties of the catalyst before and after discharge reaction.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"695 ","pages":"Article 120180"},"PeriodicalIF":4.7000,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis A: General","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0926860X2500081X","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Dielectric barrier discharge (DBD) plasma catalytic technology is considered as one of the most effective methods for elimination of diluted volatile organic compounds (VOCs) due to its advantages of high efficiency, low cost, and wide applicability. The design of highly efficient catalytic materials is a notable challenge for this technology. In this study, Ti₃C₂T_x, GO, and NiMn₂O₄, which possess a large specific surface area and high electron transport properties, were introduced as catalyst supports. These materials were combined with CoMn-BTC to synthesize three types of supported composite catalysts, which were used for the DBD-assisted VOCs degradation. Characterization analyses, including XRD, FTIR and SEM, indicated that CoMn-BTC was successfully integrated with the three supports. The large specific surface area and more oxygen vacancy for CoMn-BTC/Ti₃C₂T_x than bulk CoMn-BTC explained the enhanced toluene removal efficiency and mineralization, CO₂ selectivity, along with suppression of undesirable O₃ and NO_x. Characterization of CoMn-BTC/Ti₃C₂T_x catalysts before and after the plasma catalytic process indicated that high adsorbed oxygen species and the redox cycles between Co^3 +/Co²⁺ and Mn²⁺/(Mn⁴⁺, Mn³⁺) species can effectively promote toluene and intermediates oxidation. Furthermore, GC-MS analysis of the organic by-products in the effluent gas revealed that the amounts of intermediates such as nitrophenol reduced in the CoMn-BTC/Ti₃C₂T_x compared with CoMn-BTC, further demonstrating that CoMn-BTC/Ti₃C₂T_x had excellent catalytic activity. At last, the possible reaction pathways of toluene degradation in plasma-catalytic system was proposed in combination with analysis results of GC-MS, optical emission spectroscopy and properties of the catalyst before and after discharge reaction.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.