Sara Vafadar, Saeed Jafari, Saeed Yousefinejad, Hossein Kazemian, Esmaeel Soleimani
{"title":"用于乙苯可持续氧化的Ag/蛋壳纳米催化剂：合成、表征和性能","authors":"Sara Vafadar, Saeed Jafari, Saeed Yousefinejad, Hossein Kazemian, Esmaeel Soleimani","doi":"10.1007/s10562-025-05002-y","DOIUrl":null,"url":null,"abstract":"<div><p>Catalytic oxidation is one of the most effective technologies for controlling volatile organic compounds (VOCs) due to its environmental friendliness and energy efficiency. Supported noble metal nanostructures are among the most commonly used catalysts, exhibiting high activity, durable stability, poison tolerance, and easy regeneration. The solid, hierarchical, and porous structure of eggshell makes it an excellent support for dispersing and stabilizing nanoparticles. In this study, an Ag/eggshell catalyst was synthesized by the impregnation method in an aqueous medium and characterized using SEM, TEM, XRD, and FTIR. The XRD results revealed the diffraction peaks of silver nanoparticles, and TEM analysis showed an average nanoparticle size of 52 ± 11 nm. The effects of different synthesis and operational factors on the catalytic activity for ethylbenzene oxidation were investigated in a gas matrix at various temperatures. Catalysts synthesized with Ag/Ca molar ratios of 10.8%, 19.9%, and 34.3% resulted in t₉₀ (temperature for 90% conversion) at 204, 226, and 283 °C, respectively. An increase in relative humidity from 0 to 40% led to an increase in t₉₀ from 201 to 275 °C. In conclusion, Ag/eggshell catalysts demonstrate significant potential for the oxidation of airborne ethylbenzene in occupational settings.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 5","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ag/Eggshell Nanocatalyst for Sustainable Ethylbenzene Oxidation: Synthesis, Characterization, and Performance\",\"authors\":\"Sara Vafadar, Saeed Jafari, Saeed Yousefinejad, Hossein Kazemian, Esmaeel Soleimani\",\"doi\":\"10.1007/s10562-025-05002-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Catalytic oxidation is one of the most effective technologies for controlling volatile organic compounds (VOCs) due to its environmental friendliness and energy efficiency. Supported noble metal nanostructures are among the most commonly used catalysts, exhibiting high activity, durable stability, poison tolerance, and easy regeneration. The solid, hierarchical, and porous structure of eggshell makes it an excellent support for dispersing and stabilizing nanoparticles. In this study, an Ag/eggshell catalyst was synthesized by the impregnation method in an aqueous medium and characterized using SEM, TEM, XRD, and FTIR. The XRD results revealed the diffraction peaks of silver nanoparticles, and TEM analysis showed an average nanoparticle size of 52 ± 11 nm. The effects of different synthesis and operational factors on the catalytic activity for ethylbenzene oxidation were investigated in a gas matrix at various temperatures. Catalysts synthesized with Ag/Ca molar ratios of 10.8%, 19.9%, and 34.3% resulted in t₉₀ (temperature for 90% conversion) at 204, 226, and 283 °C, respectively. An increase in relative humidity from 0 to 40% led to an increase in t₉₀ from 201 to 275 °C. In conclusion, Ag/eggshell catalysts demonstrate significant potential for the oxidation of airborne ethylbenzene in occupational settings.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 5\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-04-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05002-y\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05002-y","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Ag/Eggshell Nanocatalyst for Sustainable Ethylbenzene Oxidation: Synthesis, Characterization, and Performance
Catalytic oxidation is one of the most effective technologies for controlling volatile organic compounds (VOCs) due to its environmental friendliness and energy efficiency. Supported noble metal nanostructures are among the most commonly used catalysts, exhibiting high activity, durable stability, poison tolerance, and easy regeneration. The solid, hierarchical, and porous structure of eggshell makes it an excellent support for dispersing and stabilizing nanoparticles. In this study, an Ag/eggshell catalyst was synthesized by the impregnation method in an aqueous medium and characterized using SEM, TEM, XRD, and FTIR. The XRD results revealed the diffraction peaks of silver nanoparticles, and TEM analysis showed an average nanoparticle size of 52 ± 11 nm. The effects of different synthesis and operational factors on the catalytic activity for ethylbenzene oxidation were investigated in a gas matrix at various temperatures. Catalysts synthesized with Ag/Ca molar ratios of 10.8%, 19.9%, and 34.3% resulted in t₉₀ (temperature for 90% conversion) at 204, 226, and 283 °C, respectively. An increase in relative humidity from 0 to 40% led to an increase in t₉₀ from 201 to 275 °C. In conclusion, Ag/eggshell catalysts demonstrate significant potential for the oxidation of airborne ethylbenzene in occupational settings.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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