{"title":"Modulation of the CuxO structure and morphology for acceleration of peroxymonosulfate oxidation†","authors":"Yunhui Tian, Shilin Li and Guangxin Zhang","doi":"10.1039/D4NJ05001K","DOIUrl":null,"url":null,"abstract":"<p >Peroxymonosulfate (PMS) activation technology represents a novel advancement within advanced oxidation processes (AOPs), garnering significant attention in recent years for its efficacy in treating recalcitrant organic pollutants. This study focused on the synthesis of Cu<small><sub><em>x</em></sub></small>O catalysts <em>via</em> a one-pot solvothermal method. The investigation mainly evaluated the influence of solvents on the microstructure and morphology of the Cu<small><sub><em>x</em></sub></small>O catalyst. Microstructural analysis revealed that ethanol as a solvent could effectively modulate the surface microstructure, enhancing pore formation and increasing specific surface area, thereby optimizing the catalytic performances of Cu<small><sub><em>x</em></sub></small>O catalysts. Compared with other parameters such as initial pH and solvothermal temperature, the solvent was the key factor in the solvothermal process. The influences of catalyst dosage and PMS concentration on the catalyst's performance were explored and discussed. In addition, the pH and temperature of the solution and coexisting anions were investigated as environmental factors. Radical burst experiments confirmed the presence of sulfate radicals (SO<small><sub>4</sub></small>˙<small><sup>−</sup></small>) and hydroxyl radicals (˙OH) within the reaction system, with SO<small><sub>4</sub></small>˙<small><sup>−</sup></small> identified as the predominant species driving the degradation process. Furthermore, repeatability testing demonstrated the catalyst's stability. This research not only strengthened understanding of the PMS activation mechanism by Cu<small><sub><em>x</em></sub></small>O but also proposed novel avenues for future catalyst design and optimization.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 5","pages":" 1918-1926"},"PeriodicalIF":2.7000,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Journal of Chemistry","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/nj/d4nj05001k","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Peroxymonosulfate (PMS) activation technology represents a novel advancement within advanced oxidation processes (AOPs), garnering significant attention in recent years for its efficacy in treating recalcitrant organic pollutants. This study focused on the synthesis of CuxO catalysts via a one-pot solvothermal method. The investigation mainly evaluated the influence of solvents on the microstructure and morphology of the CuxO catalyst. Microstructural analysis revealed that ethanol as a solvent could effectively modulate the surface microstructure, enhancing pore formation and increasing specific surface area, thereby optimizing the catalytic performances of CuxO catalysts. Compared with other parameters such as initial pH and solvothermal temperature, the solvent was the key factor in the solvothermal process. The influences of catalyst dosage and PMS concentration on the catalyst's performance were explored and discussed. In addition, the pH and temperature of the solution and coexisting anions were investigated as environmental factors. Radical burst experiments confirmed the presence of sulfate radicals (SO4˙−) and hydroxyl radicals (˙OH) within the reaction system, with SO4˙− identified as the predominant species driving the degradation process. Furthermore, repeatability testing demonstrated the catalyst's stability. This research not only strengthened understanding of the PMS activation mechanism by CuxO but also proposed novel avenues for future catalyst design and optimization.