Kehinde D. Jayeola, Dimpo S. Sipuka, Tsholofelo I. Sebokolodi, Jonathan O. Babalola, Yumeng Zhao and Omotayo A. Arotiba
{"title":"二维/一维BiOBr/Bi2O2S异质结中电荷的再分配用于光电催化氧化水中有机污染物","authors":"Kehinde D. Jayeola, Dimpo S. Sipuka, Tsholofelo I. Sebokolodi, Jonathan O. Babalola, Yumeng Zhao and Omotayo A. Arotiba","doi":"10.1039/D5RA03795F","DOIUrl":null,"url":null,"abstract":"<p >This study presents the design of a 2D/1D BiOBr/Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S p–n heterojunction developed for the degradation of organic pollutants in water, addressing the issue of water contamination caused by pharmaceutical compounds. In an <em>in situ</em> hydrothermal synthesis method, the BiOBr nanosheets were synthesised on Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S nanorods in varying ratio to form a heterojunction that maximises charge separation and suppressed charge recombination. At an optimal 20% Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S ratio, BiOBr/Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S heterojunction achieved 88% degradation efficiency of ciprofloxacin and TOC removal of 60%, when compared with the pristine BiOBr and Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S. The wider application of the photoanode was investigated by degrading other pollutants like tetracycline and sulfamethoxazole. Comprehensive structural, optical, and electrochemical analyses confirmed the increased surface area and active sites, enhanced light properties and better charged separation. The radical trapping studies identified the hydroxyl radical as a primary contributor to the degradation process, indication the p–n heterojunction facilitated by the formation of a space charge region. This study establishes the BiOBr/Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S as an effective photoanode for PEC water treatment and provides a promising approach to mitigate organic pollutant detection in water.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 36","pages":" 29680-29691"},"PeriodicalIF":4.6000,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03795f?page=search","citationCount":"0","resultStr":"{\"title\":\"Redistribution of charge in a 2D/1D BiOBr/Bi2O2S heterojunction for the photoelectrocatalytic oxidation of organic pollutants in water\",\"authors\":\"Kehinde D. Jayeola, Dimpo S. Sipuka, Tsholofelo I. Sebokolodi, Jonathan O. Babalola, Yumeng Zhao and Omotayo A. Arotiba\",\"doi\":\"10.1039/D5RA03795F\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >This study presents the design of a 2D/1D BiOBr/Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S p–n heterojunction developed for the degradation of organic pollutants in water, addressing the issue of water contamination caused by pharmaceutical compounds. In an <em>in situ</em> hydrothermal synthesis method, the BiOBr nanosheets were synthesised on Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S nanorods in varying ratio to form a heterojunction that maximises charge separation and suppressed charge recombination. At an optimal 20% Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S ratio, BiOBr/Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S heterojunction achieved 88% degradation efficiency of ciprofloxacin and TOC removal of 60%, when compared with the pristine BiOBr and Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S. The wider application of the photoanode was investigated by degrading other pollutants like tetracycline and sulfamethoxazole. Comprehensive structural, optical, and electrochemical analyses confirmed the increased surface area and active sites, enhanced light properties and better charged separation. The radical trapping studies identified the hydroxyl radical as a primary contributor to the degradation process, indication the p–n heterojunction facilitated by the formation of a space charge region. This study establishes the BiOBr/Bi<small><sub>2</sub></small>O<small><sub>2</sub></small>S as an effective photoanode for PEC water treatment and provides a promising approach to mitigate organic pollutant detection in water.</p>\",\"PeriodicalId\":102,\"journal\":{\"name\":\"RSC Advances\",\"volume\":\" 36\",\"pages\":\" 29680-29691\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2025-08-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03795f?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"RSC Advances\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/ra/d5ra03795f\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"RSC Advances","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ra/d5ra03795f","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Redistribution of charge in a 2D/1D BiOBr/Bi2O2S heterojunction for the photoelectrocatalytic oxidation of organic pollutants in water
This study presents the design of a 2D/1D BiOBr/Bi2O2S p–n heterojunction developed for the degradation of organic pollutants in water, addressing the issue of water contamination caused by pharmaceutical compounds. In an in situ hydrothermal synthesis method, the BiOBr nanosheets were synthesised on Bi2O2S nanorods in varying ratio to form a heterojunction that maximises charge separation and suppressed charge recombination. At an optimal 20% Bi2O2S ratio, BiOBr/Bi2O2S heterojunction achieved 88% degradation efficiency of ciprofloxacin and TOC removal of 60%, when compared with the pristine BiOBr and Bi2O2S. The wider application of the photoanode was investigated by degrading other pollutants like tetracycline and sulfamethoxazole. Comprehensive structural, optical, and electrochemical analyses confirmed the increased surface area and active sites, enhanced light properties and better charged separation. The radical trapping studies identified the hydroxyl radical as a primary contributor to the degradation process, indication the p–n heterojunction facilitated by the formation of a space charge region. This study establishes the BiOBr/Bi2O2S as an effective photoanode for PEC water treatment and provides a promising approach to mitigate organic pollutant detection in water.
期刊介绍:
An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.