{"title":"Combination of CuO with Bi3NbO7 for Boosting Photocatalytic Performance Under Visible Light","authors":"Lei Yang, Yanming Shen, Yinyan Dou, Junhua Wen","doi":"10.1007/s11814-025-00463-8","DOIUrl":null,"url":null,"abstract":"<div><p>In this work, CuO/Bi<sub>3</sub>NbO<sub>7</sub> <i>p–n</i> heterojunction photocatalyst was designed and successfully prepared, in order to overcome the problems, such as high recombination rate of photo-generated carriers, limited light absorption range and so on. The resulted samples were characterized by techniques, such as XRD, SEM, TEM, UV–vis DRS, BET, electrochemical test. The visible light degradation performance for MB was investigated. The effects of CuO composite ratio, initial MB concentration, catalyst addition amount and pH on the catalytic activity were discussed. The experimental results showed that CuO nanoparticles were successfully loaded on Bi<sub>3</sub>NbO<sub>7</sub>, and the composite catalyst exhibited a loose and porous morphology. The combination of CuO not only improved the absorption capacity for visible light, but also promoted the transfer of photo-generated electrons and holes, and improved the photocatalytic activity of Bi<sub>3</sub>NbO<sub>7</sub>. Under the optimized experimental conditions, after visible light irradiation for 180 min, the degradation efficiencies of MB and TC on CuO/Bi<sub>3</sub>NbO<sub>7</sub> composite with 5 wt % CuO loading reached 96% and 99%, respectively, which were higher than that of bulk Bi<sub>3</sub>NbO<sub>7</sub>. This<i> p–n</i> heterojunction promoted the separation of photo-generated charges. It provides a reference for improving the photocatalytic activity of Bi<sub>3</sub>NbO<sub>7</sub>.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 10","pages":"2309 - 2319"},"PeriodicalIF":3.2000,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11814-025-00463-8","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, CuO/Bi3NbO7p–n heterojunction photocatalyst was designed and successfully prepared, in order to overcome the problems, such as high recombination rate of photo-generated carriers, limited light absorption range and so on. The resulted samples were characterized by techniques, such as XRD, SEM, TEM, UV–vis DRS, BET, electrochemical test. The visible light degradation performance for MB was investigated. The effects of CuO composite ratio, initial MB concentration, catalyst addition amount and pH on the catalytic activity were discussed. The experimental results showed that CuO nanoparticles were successfully loaded on Bi3NbO7, and the composite catalyst exhibited a loose and porous morphology. The combination of CuO not only improved the absorption capacity for visible light, but also promoted the transfer of photo-generated electrons and holes, and improved the photocatalytic activity of Bi3NbO7. Under the optimized experimental conditions, after visible light irradiation for 180 min, the degradation efficiencies of MB and TC on CuO/Bi3NbO7 composite with 5 wt % CuO loading reached 96% and 99%, respectively, which were higher than that of bulk Bi3NbO7. This p–n heterojunction promoted the separation of photo-generated charges. It provides a reference for improving the photocatalytic activity of Bi3NbO7.
期刊介绍:
The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.