Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl
An increase of carrier concentration is one of the most important routes for enhancing the catalytic performance of semiconductor photocatalysts. In this study, the Sillén–Aurivillius oxychloride Bi<sub>4</sub>NbO<sub>8</sub>Cl with hole doping was successfully prepared by a...
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MDPI AG
2020-12-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/12/1425 |
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| author | Jingbang Sun Ni Han Yan Gu Xiaowang Lu Liang Si Qinfang Zhang |
| author_facet | Jingbang Sun Ni Han Yan Gu Xiaowang Lu Liang Si Qinfang Zhang |
| author_sort | Jingbang Sun |
| collection | DOAJ |
| description | An increase of carrier concentration is one of the most important routes for enhancing the catalytic performance of semiconductor photocatalysts. In this study, the Sillén–Aurivillius oxychloride Bi<sub>4</sub>NbO<sub>8</sub>Cl with hole doping was successfully prepared by a solid-state reaction method. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectra (UV–vis DRS), X-ray photoelectron spectrometry (XPS) and photoluminescence spectra (PL) were used to characterize and analyze the prepared samples. The experimental results and density functional theory calculations demonstrate that hole doping can be formed in Bi<sub>4</sub>NbO<sub>8</sub>Cl by inserting zinc into the niobium site, and the photocatalytic activity can be improved by introducing additional holes into Bi<sub>4</sub>NbO<sub>8</sub>Cl. The photogenerated hole (h<sup>+</sup>) is considered to be the main active species to degrade trypan blue (TB) through trapping experiments. The optimal photocatalyst of Bi<sub>4</sub>Nb<sub>0.8</sub>Zn<sub>0.2</sub>O<sub>8</sub>Cl exhibits excellent photocatalytic activity in degradation of trypan blue under visible light irritation. Moreover, a possible photocatalytic degradation mechanism is discussed according the experimental and analytical results. |
| first_indexed | 2024-03-10T14:18:20Z |
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| id | doaj.art-4d750328b3d246a9833e597beb51bd52 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T14:18:20Z |
| publishDate | 2020-12-01 |
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| series | Catalysts |
| spelling | doaj.art-4d750328b3d246a9833e597beb51bd522023-11-20T23:37:02ZengMDPI AGCatalysts2073-43442020-12-011012142510.3390/catal10121425Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>ClJingbang Sun0Ni Han1Yan Gu2Xiaowang Lu3Liang Si4Qinfang Zhang5School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224001, ChinaSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224001, ChinaSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224001, ChinaSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224001, ChinaNingbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224001, ChinaAn increase of carrier concentration is one of the most important routes for enhancing the catalytic performance of semiconductor photocatalysts. In this study, the Sillén–Aurivillius oxychloride Bi<sub>4</sub>NbO<sub>8</sub>Cl with hole doping was successfully prepared by a solid-state reaction method. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectra (UV–vis DRS), X-ray photoelectron spectrometry (XPS) and photoluminescence spectra (PL) were used to characterize and analyze the prepared samples. The experimental results and density functional theory calculations demonstrate that hole doping can be formed in Bi<sub>4</sub>NbO<sub>8</sub>Cl by inserting zinc into the niobium site, and the photocatalytic activity can be improved by introducing additional holes into Bi<sub>4</sub>NbO<sub>8</sub>Cl. The photogenerated hole (h<sup>+</sup>) is considered to be the main active species to degrade trypan blue (TB) through trapping experiments. The optimal photocatalyst of Bi<sub>4</sub>Nb<sub>0.8</sub>Zn<sub>0.2</sub>O<sub>8</sub>Cl exhibits excellent photocatalytic activity in degradation of trypan blue under visible light irritation. Moreover, a possible photocatalytic degradation mechanism is discussed according the experimental and analytical results.https://www.mdpi.com/2073-4344/10/12/1425Bi<sub>4</sub>NbO<sub>8</sub>Clhole dopingvisible lightphotocatalytic degradation |
| spellingShingle | Jingbang Sun Ni Han Yan Gu Xiaowang Lu Liang Si Qinfang Zhang Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl Catalysts Bi<sub>4</sub>NbO<sub>8</sub>Cl hole doping visible light photocatalytic degradation |
| title | Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl |
| title_full | Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl |
| title_fullStr | Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl |
| title_full_unstemmed | Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl |
| title_short | Hole Doping to Enhance the Photocatalytic Activity of Bi<sub>4</sub>NbO<sub>8</sub>Cl |
| title_sort | hole doping to enhance the photocatalytic activity of bi sub 4 sub nbo sub 8 sub cl |
| topic | Bi<sub>4</sub>NbO<sub>8</sub>Cl hole doping visible light photocatalytic degradation |
| url | https://www.mdpi.com/2073-4344/10/12/1425 |
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