{"title":"Enhanced photocatalytic degradation of organic dyes by dual heterojunction of ZnO/NiWO4/V2C MXene","authors":"Weibing Zhou, Lilong Sun, Shiqiao Xiang, Shouqin Tian","doi":"10.1016/j.apsusc.2024.161260","DOIUrl":null,"url":null,"abstract":"Multiphase composite catalysts can be designed for efficient photocatalytic treatment of organic pollutants in wastewater. Herein, the multiphase ZnO/NiWO<ce:inf loc=\"post\">4</ce:inf>/V<ce:inf loc=\"post\">2</ce:inf>C composite catalysts with dual heterojunction and hierarchically assembled nanoflower structures were constructed via a facile two-step hydrothermal and electrostatic self-assembly method. Utilizing NiWO<ce:inf loc=\"post\">4</ce:inf> and V<ce:inf loc=\"post\">2</ce:inf>C as co-catalysts, these catalysts effectively degraded cationic dyes, methylene blue (MB) and rhodamine B (RhB) under visible light irradiation. The ZnO/NiWO<ce:inf loc=\"post\">4</ce:inf>/V<ce:inf loc=\"post\">2</ce:inf>C catalyst exhibited higher photocatalytic activity than ZnO in the degradation of MB and RhB, with rate constants of 0.0194 min<ce:sup loc=\"post\">−1</ce:sup> (a 7.43-fold enhancement) and 0.0176 min<ce:sup loc=\"post\">−</ce:sup><ce:sup loc=\"post\">1</ce:sup> (a 3.13-fold enhancement). The higher activity can be attributed to the construction of the double heterojunction using NiWO<ce:inf loc=\"post\">4</ce:inf> and V<ce:inf loc=\"post\">2</ce:inf>C, which can facilitate efficient electron transport, improve charge separation efficiency, and provide more active sites. After four cycles, the ZnO/NiWO<ce:inf loc=\"post\">4</ce:inf>/V<ce:inf loc=\"post\">2</ce:inf>C catalyst still maintained good stability. Consequently, this work can offer a promising approach for environmental pollution treatment.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":null,"pages":null},"PeriodicalIF":6.3000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.apsusc.2024.161260","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Multiphase composite catalysts can be designed for efficient photocatalytic treatment of organic pollutants in wastewater. Herein, the multiphase ZnO/NiWO4/V2C composite catalysts with dual heterojunction and hierarchically assembled nanoflower structures were constructed via a facile two-step hydrothermal and electrostatic self-assembly method. Utilizing NiWO4 and V2C as co-catalysts, these catalysts effectively degraded cationic dyes, methylene blue (MB) and rhodamine B (RhB) under visible light irradiation. The ZnO/NiWO4/V2C catalyst exhibited higher photocatalytic activity than ZnO in the degradation of MB and RhB, with rate constants of 0.0194 min−1 (a 7.43-fold enhancement) and 0.0176 min−1 (a 3.13-fold enhancement). The higher activity can be attributed to the construction of the double heterojunction using NiWO4 and V2C, which can facilitate efficient electron transport, improve charge separation efficiency, and provide more active sites. After four cycles, the ZnO/NiWO4/V2C catalyst still maintained good stability. Consequently, this work can offer a promising approach for environmental pollution treatment.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.