Bandi Ashok , K. Ramesh , Ashok Bhogi , G. Upender
{"title":"可见光促进 Bi2WO6/Bi2W0.75Mo0.25O6 和 Bi2MoO6/Bi2W0.75Mo0.25O6 异质结构降解罗丹明 B:DFT 和光催化研究","authors":"Bandi Ashok , K. Ramesh , Ashok Bhogi , G. Upender","doi":"10.1016/j.ijleo.2024.171927","DOIUrl":null,"url":null,"abstract":"<div><p>In the recent past, the dye degradation through semiconductor photocatalysis under visible light has drawn the widespread attention. In this view, visible active (1-x)Bi<sub>2</sub>WO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> and (1-x)Bi<sub>2</sub>MoO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> (commonly 0.05 ≤ x ≤ 0.20 wt%) heterostructures prepared through a one-step hydrothermal process. These compounds were analyzed by XRD, FE-SEM, HRTEM, XPS, FT-IR, DFT, UV-Vis DRS and photoluminescence. In (1-x)Bi<sub>2</sub>WO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub>, the 0.90Bi<sub>2</sub>WO<sub>6</sub>/0.10Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructure showed the highest photocatalytic activity in comparison with Bi<sub>2</sub>WO<sub>6</sub> and Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub>. On contrary, all (1-x)Bi<sub>2</sub>MoO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructures exhibited the less photocatalytic activity than that of Bi<sub>2</sub>MoO<sub>6</sub>. The analysis carried out on both heterostructures clearly demonstrated that (1-x)Bi<sub>2</sub>WO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> is more active in comparison to (1-x)Bi<sub>2</sub>MoO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6.</sub> The radical trapping test was conducted for 0.90Bi<sub>2</sub>WO<sub>6</sub>/ 0.10Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructure, asserted that <span><math><msubsup><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow><mrow><mo>∙</mo><mspace></mspace><mo>−</mo></mrow></msubsup></math></span> and <span><math><msup><mrow><mi>h</mi></mrow><mrow><mo>+</mo><mspace></mspace></mrow></msup></math></span>radicals were dominant species responsible for Rhodamine B (Rh B) photo-degradation. The estimated redox potentials of Bi<sub>2</sub>WO<sub>6</sub>, Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> establish the fact that the charge (e<sup>-</sup>/h<sup>+</sup>) migration between Bi<sub>2</sub>WO<sub>6</sub> and Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> via Z scheme is accountable for the aggressive photocatalytic activity of Bi<sub>2</sub>WO<sub>6</sub>/Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructure. The plausible Z scheme mechanism of the generation of electron-hole pairs, charge transfer and also visible light-induced degradation of Rh B was proposed.</p></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Rhodamine B degradation over visible light promoted Bi2WO6/Bi2W0.75Mo0.25O6 and Bi2MoO6/Bi2W0.75Mo0.25O6 heterostructures: DFT and photocatalytic studies\",\"authors\":\"Bandi Ashok , K. Ramesh , Ashok Bhogi , G. Upender\",\"doi\":\"10.1016/j.ijleo.2024.171927\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the recent past, the dye degradation through semiconductor photocatalysis under visible light has drawn the widespread attention. In this view, visible active (1-x)Bi<sub>2</sub>WO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> and (1-x)Bi<sub>2</sub>MoO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> (commonly 0.05 ≤ x ≤ 0.20 wt%) heterostructures prepared through a one-step hydrothermal process. These compounds were analyzed by XRD, FE-SEM, HRTEM, XPS, FT-IR, DFT, UV-Vis DRS and photoluminescence. In (1-x)Bi<sub>2</sub>WO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub>, the 0.90Bi<sub>2</sub>WO<sub>6</sub>/0.10Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructure showed the highest photocatalytic activity in comparison with Bi<sub>2</sub>WO<sub>6</sub> and Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub>. On contrary, all (1-x)Bi<sub>2</sub>MoO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructures exhibited the less photocatalytic activity than that of Bi<sub>2</sub>MoO<sub>6</sub>. The analysis carried out on both heterostructures clearly demonstrated that (1-x)Bi<sub>2</sub>WO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> is more active in comparison to (1-x)Bi<sub>2</sub>MoO<sub>6</sub>/xBi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6.</sub> The radical trapping test was conducted for 0.90Bi<sub>2</sub>WO<sub>6</sub>/ 0.10Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructure, asserted that <span><math><msubsup><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow><mrow><mo>∙</mo><mspace></mspace><mo>−</mo></mrow></msubsup></math></span> and <span><math><msup><mrow><mi>h</mi></mrow><mrow><mo>+</mo><mspace></mspace></mrow></msup></math></span>radicals were dominant species responsible for Rhodamine B (Rh B) photo-degradation. The estimated redox potentials of Bi<sub>2</sub>WO<sub>6</sub>, Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> establish the fact that the charge (e<sup>-</sup>/h<sup>+</sup>) migration between Bi<sub>2</sub>WO<sub>6</sub> and Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> via Z scheme is accountable for the aggressive photocatalytic activity of Bi<sub>2</sub>WO<sub>6</sub>/Bi<sub>2</sub>W<sub>0.75</sub>Mo<sub>0.25</sub>O<sub>6</sub> heterostructure. The plausible Z scheme mechanism of the generation of electron-hole pairs, charge transfer and also visible light-induced degradation of Rh B was proposed.</p></div>\",\"PeriodicalId\":19513,\"journal\":{\"name\":\"Optik\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-06-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optik\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0030402624003267\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optik","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030402624003267","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Engineering","Score":null,"Total":0}
Rhodamine B degradation over visible light promoted Bi2WO6/Bi2W0.75Mo0.25O6 and Bi2MoO6/Bi2W0.75Mo0.25O6 heterostructures: DFT and photocatalytic studies
In the recent past, the dye degradation through semiconductor photocatalysis under visible light has drawn the widespread attention. In this view, visible active (1-x)Bi2WO6/xBi2W0.75Mo0.25O6 and (1-x)Bi2MoO6/xBi2W0.75Mo0.25O6 (commonly 0.05 ≤ x ≤ 0.20 wt%) heterostructures prepared through a one-step hydrothermal process. These compounds were analyzed by XRD, FE-SEM, HRTEM, XPS, FT-IR, DFT, UV-Vis DRS and photoluminescence. In (1-x)Bi2WO6/xBi2W0.75Mo0.25O6, the 0.90Bi2WO6/0.10Bi2W0.75Mo0.25O6 heterostructure showed the highest photocatalytic activity in comparison with Bi2WO6 and Bi2W0.75Mo0.25O6. On contrary, all (1-x)Bi2MoO6/xBi2W0.75Mo0.25O6 heterostructures exhibited the less photocatalytic activity than that of Bi2MoO6. The analysis carried out on both heterostructures clearly demonstrated that (1-x)Bi2WO6/xBi2W0.75Mo0.25O6 is more active in comparison to (1-x)Bi2MoO6/xBi2W0.75Mo0.25O6. The radical trapping test was conducted for 0.90Bi2WO6/ 0.10Bi2W0.75Mo0.25O6 heterostructure, asserted that and radicals were dominant species responsible for Rhodamine B (Rh B) photo-degradation. The estimated redox potentials of Bi2WO6, Bi2W0.75Mo0.25O6 establish the fact that the charge (e-/h+) migration between Bi2WO6 and Bi2W0.75Mo0.25O6 via Z scheme is accountable for the aggressive photocatalytic activity of Bi2WO6/Bi2W0.75Mo0.25O6 heterostructure. The plausible Z scheme mechanism of the generation of electron-hole pairs, charge transfer and also visible light-induced degradation of Rh B was proposed.
期刊介绍:
Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields:
Optics:
-Optics design, geometrical and beam optics, wave optics-
Optical and micro-optical components, diffractive optics, devices and systems-
Photoelectric and optoelectronic devices-
Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials-
Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis-
Optical testing and measuring techniques-
Optical communication and computing-
Physiological optics-
As well as other related topics.