Shifa Wang , Xiangyu Chen , Leiming Fang , Huajing Gao , Mengjun Han , Xiping Chen , Yuanhua Xia , Lei Xie , Hua Yang
{"title":"双异质结CQDs/CeO2/BaFe12O19磁分离光催化剂:构建、结构表征、染料和POPs去除，以及磁和光催化的相互关系","authors":"Shifa Wang , Xiangyu Chen , Leiming Fang , Huajing Gao , Mengjun Han , Xiping Chen , Yuanhua Xia , Lei Xie , Hua Yang","doi":"10.1016/j.nucana.2022.100026","DOIUrl":null,"url":null,"abstract":"<div><p>This novel double heterojunction carbon quantum dots (CQDs)/CeO<sub>2</sub>/BaFe<sub>12</sub>O<sub>19</sub> magnetic separation photocatalysts (CCBFOMSPs) were successfully prepared via a polyacrylamide gel method and low temperature sintering technology combined with a hydrothermal method. The CQDs components in CCBFOMSPs were identified by neutron powder diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy. The charge carriers could transfer and separation between the valence state components (CeO<sub>2</sub> and BaFe<sub>12</sub>O<sub>19</sub>) and CQDs facilely, inhibiting the recombination of electron-hole pairs significantly by Hall effect. The photocatalytic activity of CCBFOMSPs for the degradation of mixed dyes include methyl orange (MO), rhodamine B (RhB) and methylene blue (MB) and tetrabromobisphenol A (TBBPA) were remarkably improved by regulating the electromagnetic interaction between the BaFe<sub>12</sub>O<sub>19</sub> contents and the photo-generated electrons. Capturing experiment showed that the active species of hole (h<sub>VB</sub><sup>+</sup>), hydroxyl radical (•OH) and superoxide radical (•O<sub>2</sub><sup>−</sup>) played dominant roles in mixed dyes degradation. Attractively, the effect shed new light on wide applications of the double heterojunction magnetic separation photocatalysts.</p></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277318392200026X/pdfft?md5=77a3779b2db96171c982c1ccbd96b021&pid=1-s2.0-S277318392200026X-main.pdf","citationCount":"35","resultStr":"{\"title\":\"Double heterojunction CQDs/CeO2/BaFe12O19 magnetic separation photocatalysts: Construction, structural characterization, dye and POPs removal, and the interrelationships between magnetism and photocatalysis\",\"authors\":\"Shifa Wang , Xiangyu Chen , Leiming Fang , Huajing Gao , Mengjun Han , Xiping Chen , Yuanhua Xia , Lei Xie , Hua Yang\",\"doi\":\"10.1016/j.nucana.2022.100026\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This novel double heterojunction carbon quantum dots (CQDs)/CeO<sub>2</sub>/BaFe<sub>12</sub>O<sub>19</sub> magnetic separation photocatalysts (CCBFOMSPs) were successfully prepared via a polyacrylamide gel method and low temperature sintering technology combined with a hydrothermal method. The CQDs components in CCBFOMSPs were identified by neutron powder diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy. The charge carriers could transfer and separation between the valence state components (CeO<sub>2</sub> and BaFe<sub>12</sub>O<sub>19</sub>) and CQDs facilely, inhibiting the recombination of electron-hole pairs significantly by Hall effect. The photocatalytic activity of CCBFOMSPs for the degradation of mixed dyes include methyl orange (MO), rhodamine B (RhB) and methylene blue (MB) and tetrabromobisphenol A (TBBPA) were remarkably improved by regulating the electromagnetic interaction between the BaFe<sub>12</sub>O<sub>19</sub> contents and the photo-generated electrons. Capturing experiment showed that the active species of hole (h<sub>VB</sub><sup>+</sup>), hydroxyl radical (•OH) and superoxide radical (•O<sub>2</sub><sup>−</sup>) played dominant roles in mixed dyes degradation. Attractively, the effect shed new light on wide applications of the double heterojunction magnetic separation photocatalysts.</p></div>\",\"PeriodicalId\":100965,\"journal\":{\"name\":\"Nuclear Analysis\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S277318392200026X/pdfft?md5=77a3779b2db96171c982c1ccbd96b021&pid=1-s2.0-S277318392200026X-main.pdf\",\"citationCount\":\"35\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Analysis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S277318392200026X\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Analysis","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S277318392200026X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Double heterojunction CQDs/CeO2/BaFe12O19 magnetic separation photocatalysts: Construction, structural characterization, dye and POPs removal, and the interrelationships between magnetism and photocatalysis
This novel double heterojunction carbon quantum dots (CQDs)/CeO2/BaFe12O19 magnetic separation photocatalysts (CCBFOMSPs) were successfully prepared via a polyacrylamide gel method and low temperature sintering technology combined with a hydrothermal method. The CQDs components in CCBFOMSPs were identified by neutron powder diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy. The charge carriers could transfer and separation between the valence state components (CeO2 and BaFe12O19) and CQDs facilely, inhibiting the recombination of electron-hole pairs significantly by Hall effect. The photocatalytic activity of CCBFOMSPs for the degradation of mixed dyes include methyl orange (MO), rhodamine B (RhB) and methylene blue (MB) and tetrabromobisphenol A (TBBPA) were remarkably improved by regulating the electromagnetic interaction between the BaFe12O19 contents and the photo-generated electrons. Capturing experiment showed that the active species of hole (hVB+), hydroxyl radical (•OH) and superoxide radical (•O2−) played dominant roles in mixed dyes degradation. Attractively, the effect shed new light on wide applications of the double heterojunction magnetic separation photocatalysts.
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