{"title":"构建缺氧的 Cu/WO3/TNT 异质结薄膜以改进甲苯和细菌的光催化分解:从台架研究到扩大反应器试验","authors":"","doi":"10.1016/j.seppur.2024.129919","DOIUrl":null,"url":null,"abstract":"<div><div>A robust and active photocatalyst that can effectively decompose indoor air pollutants is highly demand. In this study, we have fabricated Cu and WO<sub>3</sub> modified titania nanotube (Cu/WO<sub>3</sub>/TNT) with oxygen vacancies to enhance photocatalytic decomposition of toluene and bacteria under light irradiation. The roles of WO<sub>3</sub> and Cu modification on TNT film have been investigated through photoelectrochemical (PEC) measurements and photocatalytic decomposition of pollutants. The results demonstrate that the deposition of Cu (about 2.5 %) and WO<sub>3</sub> (about 1.1 %) onto TNT film, as well as concurrent formation of oxygen vacancies, effectively enhance PEC response and photocatalytic activity of TNT film. Under UV–visible light irradiation, the optimized Cu/WO<sub>3</sub>/TNT catalyst can effectively degrade toluene by approximately 95.0 % in 90 min, while over 99.9 % of <em>E. coli</em> bacteria can be inactivated by the photocatalyst under visible light irradiation. Both Cu/WO<sub>3</sub> deposition and oxygen vacancy formation improve light absorption and charge carrier separation of the TNT film for pollutants degradation. Oxygen plays a crucial role in the toluene degradation process, with O<sub>2</sub>/<sup>•</sup>O<sub>2</sub><sup>−</sup> activation considered as a key step for subsequent oxidation of toluene or benzyl radical. Whereas, the main oxidants for bacteria inactivation during the process are identified as <sup>1</sup>O<sub>2</sub> and h<sup>+</sup>. Scaled-up experiments (∼1.0 m<sup>3</sup> reactor for toluene degradation and ∼ 0.1 m<sup>3</sup> reactor for gas phase bacteria inactivation) prove that the the optimized Cu/WO<sub>3</sub>/TNT film is a promising photocatalyst for indoor air purification under UV–visible light irradiation.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Constructing oxygen-deficient Cu/WO3/TNT heterojunction film for improved photocatalytic decomposition of toluene and bacteria: From bench-scale study to enlarged reactor test\",\"authors\":\"\",\"doi\":\"10.1016/j.seppur.2024.129919\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A robust and active photocatalyst that can effectively decompose indoor air pollutants is highly demand. In this study, we have fabricated Cu and WO<sub>3</sub> modified titania nanotube (Cu/WO<sub>3</sub>/TNT) with oxygen vacancies to enhance photocatalytic decomposition of toluene and bacteria under light irradiation. The roles of WO<sub>3</sub> and Cu modification on TNT film have been investigated through photoelectrochemical (PEC) measurements and photocatalytic decomposition of pollutants. The results demonstrate that the deposition of Cu (about 2.5 %) and WO<sub>3</sub> (about 1.1 %) onto TNT film, as well as concurrent formation of oxygen vacancies, effectively enhance PEC response and photocatalytic activity of TNT film. Under UV–visible light irradiation, the optimized Cu/WO<sub>3</sub>/TNT catalyst can effectively degrade toluene by approximately 95.0 % in 90 min, while over 99.9 % of <em>E. coli</em> bacteria can be inactivated by the photocatalyst under visible light irradiation. Both Cu/WO<sub>3</sub> deposition and oxygen vacancy formation improve light absorption and charge carrier separation of the TNT film for pollutants degradation. Oxygen plays a crucial role in the toluene degradation process, with O<sub>2</sub>/<sup>•</sup>O<sub>2</sub><sup>−</sup> activation considered as a key step for subsequent oxidation of toluene or benzyl radical. Whereas, the main oxidants for bacteria inactivation during the process are identified as <sup>1</sup>O<sub>2</sub> and h<sup>+</sup>. Scaled-up experiments (∼1.0 m<sup>3</sup> reactor for toluene degradation and ∼ 0.1 m<sup>3</sup> reactor for gas phase bacteria inactivation) prove that the the optimized Cu/WO<sub>3</sub>/TNT film is a promising photocatalyst for indoor air purification under UV–visible light irradiation.</div></div>\",\"PeriodicalId\":427,\"journal\":{\"name\":\"Separation and Purification Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-09-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Separation and Purification Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S138358662403658X\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S138358662403658X","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Constructing oxygen-deficient Cu/WO3/TNT heterojunction film for improved photocatalytic decomposition of toluene and bacteria: From bench-scale study to enlarged reactor test
A robust and active photocatalyst that can effectively decompose indoor air pollutants is highly demand. In this study, we have fabricated Cu and WO3 modified titania nanotube (Cu/WO3/TNT) with oxygen vacancies to enhance photocatalytic decomposition of toluene and bacteria under light irradiation. The roles of WO3 and Cu modification on TNT film have been investigated through photoelectrochemical (PEC) measurements and photocatalytic decomposition of pollutants. The results demonstrate that the deposition of Cu (about 2.5 %) and WO3 (about 1.1 %) onto TNT film, as well as concurrent formation of oxygen vacancies, effectively enhance PEC response and photocatalytic activity of TNT film. Under UV–visible light irradiation, the optimized Cu/WO3/TNT catalyst can effectively degrade toluene by approximately 95.0 % in 90 min, while over 99.9 % of E. coli bacteria can be inactivated by the photocatalyst under visible light irradiation. Both Cu/WO3 deposition and oxygen vacancy formation improve light absorption and charge carrier separation of the TNT film for pollutants degradation. Oxygen plays a crucial role in the toluene degradation process, with O2/•O2− activation considered as a key step for subsequent oxidation of toluene or benzyl radical. Whereas, the main oxidants for bacteria inactivation during the process are identified as 1O2 and h+. Scaled-up experiments (∼1.0 m3 reactor for toluene degradation and ∼ 0.1 m3 reactor for gas phase bacteria inactivation) prove that the the optimized Cu/WO3/TNT film is a promising photocatalyst for indoor air purification under UV–visible light irradiation.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.