Tahereh Jasemizad, Jenny Malmström and Lokesh P. Padhye
{"title":"PEDOT 光催化活性去除水污染物的机理研究:铁和羟基自由基的作用","authors":"Tahereh Jasemizad, Jenny Malmström and Lokesh P. Padhye","doi":"10.1039/D3EW00910F","DOIUrl":null,"url":null,"abstract":"<p >In this study, the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) was successfully polymerised through electrochemical (E-PEDOT) and chemical oxidative (C-PEDOT) polymerisation techniques. The photocatalytic reaction mechanism of PEDOT in removing aqueous contaminants, including hexazinone and methylene blue, was investigated with and without the use of Fe(<small>III</small>). An increase in iron concentration during PEDOT irradiation resulted in enhanced degradation of the contaminants. Moreover, E-PEDOT showed up to ∼90% removal of contaminants by a combination of adsorption and photocatalysis effects. Hydroxyl radicals played a critical role in the photocatalytic degradation of contaminants using PEDOT, in the presence and absence of iron. This mechanism was proved through coumarin degradation. When evaluating reusability, E-PEDOT showed a decrease in its adsorption behaviour but a consistent photocatalytic activity. Finally, it was revealed that the addition of iron externally or during chemical polymerisation could boost PEDOT performance. Therefore, it is worth considering the implementation of the UV/Fe(<small>III</small>)/PEDOT system, exhibiting remarkable efficacy in eliminating organic contaminants from aqueous solutions.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ew/d3ew00910f?page=search","citationCount":"0","resultStr":"{\"title\":\"Mechanistic investigation of the photocatalytic activity of PEDOT for aqueous contaminant removal: the role of iron and hydroxyl radicals†\",\"authors\":\"Tahereh Jasemizad, Jenny Malmström and Lokesh P. Padhye\",\"doi\":\"10.1039/D3EW00910F\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >In this study, the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) was successfully polymerised through electrochemical (E-PEDOT) and chemical oxidative (C-PEDOT) polymerisation techniques. The photocatalytic reaction mechanism of PEDOT in removing aqueous contaminants, including hexazinone and methylene blue, was investigated with and without the use of Fe(<small>III</small>). An increase in iron concentration during PEDOT irradiation resulted in enhanced degradation of the contaminants. Moreover, E-PEDOT showed up to ∼90% removal of contaminants by a combination of adsorption and photocatalysis effects. Hydroxyl radicals played a critical role in the photocatalytic degradation of contaminants using PEDOT, in the presence and absence of iron. This mechanism was proved through coumarin degradation. When evaluating reusability, E-PEDOT showed a decrease in its adsorption behaviour but a consistent photocatalytic activity. Finally, it was revealed that the addition of iron externally or during chemical polymerisation could boost PEDOT performance. Therefore, it is worth considering the implementation of the UV/Fe(<small>III</small>)/PEDOT system, exhibiting remarkable efficacy in eliminating organic contaminants from aqueous solutions.</p>\",\"PeriodicalId\":75,\"journal\":{\"name\":\"Environmental Science: Water Research & Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-04-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2024/ew/d3ew00910f?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Science: Water Research & Technology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/ew/d3ew00910f\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science: Water Research & Technology","FirstCategoryId":"93","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ew/d3ew00910f","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Mechanistic investigation of the photocatalytic activity of PEDOT for aqueous contaminant removal: the role of iron and hydroxyl radicals†
In this study, the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) was successfully polymerised through electrochemical (E-PEDOT) and chemical oxidative (C-PEDOT) polymerisation techniques. The photocatalytic reaction mechanism of PEDOT in removing aqueous contaminants, including hexazinone and methylene blue, was investigated with and without the use of Fe(III). An increase in iron concentration during PEDOT irradiation resulted in enhanced degradation of the contaminants. Moreover, E-PEDOT showed up to ∼90% removal of contaminants by a combination of adsorption and photocatalysis effects. Hydroxyl radicals played a critical role in the photocatalytic degradation of contaminants using PEDOT, in the presence and absence of iron. This mechanism was proved through coumarin degradation. When evaluating reusability, E-PEDOT showed a decrease in its adsorption behaviour but a consistent photocatalytic activity. Finally, it was revealed that the addition of iron externally or during chemical polymerisation could boost PEDOT performance. Therefore, it is worth considering the implementation of the UV/Fe(III)/PEDOT system, exhibiting remarkable efficacy in eliminating organic contaminants from aqueous solutions.
期刊介绍:
Environmental Science: Water Research & Technology seeks to showcase high quality research about fundamental science, innovative technologies, and management practices that promote sustainable water.