Ashok Kumar Chakraborty , S.M. Abdur Razzaque , Md Ahsanul Haque , Afroza Akter , Sumon Ganguli , Md. Nazrul Islam , Alam S.M. Nur , Md Abdus Sabur
{"title":"Fabrication of visible-light induced fluorine doped bismuth oxide (Bi2O3-xFx) photocatalyst in degrading textile dyes from wastewater","authors":"Ashok Kumar Chakraborty , S.M. Abdur Razzaque , Md Ahsanul Haque , Afroza Akter , Sumon Ganguli , Md. Nazrul Islam , Alam S.M. Nur , Md Abdus Sabur","doi":"10.1016/j.cinorg.2023.100019","DOIUrl":null,"url":null,"abstract":"<div><p>Discharge of unused and untreated dye effluents into the environment by the textile industries is a major issue. In this wastewater, the methylene blue (MB) and methyl orange (MO) remain in a dissolved state along with various pollutants at different levels. To remove these dyes, visible light (λ ≥ 420 nm) active F (fluorine) doped bismuth oxide (Bi<sub>2</sub>O<sub>3-x</sub>F<sub>x</sub>) photocatalyst was synthesized through facile sol-gel method utilizing bismuth oxide (Bi<sub>2</sub>O<sub>3</sub>) and hydrofluoric acid (HF). Bi<sub>2</sub>O<sub>3-x</sub>F<sub>x</sub> demonstrated enhanced photocatalytic activity to decompose methylene blue (MB) and methyl orange (MO) under visible light. The F content in Bi<sub>2</sub>O<sub>3-x</sub>F<sub>x</sub> composite was optimized to 0.94 atom % with respect to organics decomposition. The study showed that enhanced photocatalytic activity of Bi<sub>2</sub>O<sub>3-x</sub>F<sub>x</sub> was ascribed due to participation of photo-induced electron (e¯)-hole (h<sup>+</sup>) in photocatalysis. The existence of hole (h<sup>+</sup>) and the generated °OH radical was experimentally confirmed in aqueous medium. The formation mechanism of these reactive species was explained on the basis of relative energy band position of Bi<sub>2</sub>O<sub>3-x</sub>F<sub>x</sub> and a detail photocatalytic decomposition reaction mechanism was proposed.</p></div>","PeriodicalId":100233,"journal":{"name":"Chemistry of Inorganic Materials","volume":"1 ","pages":"Article 100019"},"PeriodicalIF":0.0000,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949746923000198/pdfft?md5=0030e4b7cd5798a0e55b541fe1866fb4&pid=1-s2.0-S2949746923000198-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemistry of Inorganic Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2949746923000198","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Discharge of unused and untreated dye effluents into the environment by the textile industries is a major issue. In this wastewater, the methylene blue (MB) and methyl orange (MO) remain in a dissolved state along with various pollutants at different levels. To remove these dyes, visible light (λ ≥ 420 nm) active F (fluorine) doped bismuth oxide (Bi2O3-xFx) photocatalyst was synthesized through facile sol-gel method utilizing bismuth oxide (Bi2O3) and hydrofluoric acid (HF). Bi2O3-xFx demonstrated enhanced photocatalytic activity to decompose methylene blue (MB) and methyl orange (MO) under visible light. The F content in Bi2O3-xFx composite was optimized to 0.94 atom % with respect to organics decomposition. The study showed that enhanced photocatalytic activity of Bi2O3-xFx was ascribed due to participation of photo-induced electron (e¯)-hole (h+) in photocatalysis. The existence of hole (h+) and the generated °OH radical was experimentally confirmed in aqueous medium. The formation mechanism of these reactive species was explained on the basis of relative energy band position of Bi2O3-xFx and a detail photocatalytic decomposition reaction mechanism was proposed.
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