Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances
Well-dispersed and uniform porous ellipsoidal-shaped bismuth oxyhalides (nominal composition: 80%BiOCl/20%BiOI) microspheres were obtained by a facile solvothermal method, in which process the use of polyvinylpyrrolidone (PVP) as template agent was found to be crucial. At 150 °C, elliptical porous p...
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2022-09-01
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| author | Bing Luo Canfeng Wu Fuzeng Zhang Tingting Wang Yingbang Yao |
| author_facet | Bing Luo Canfeng Wu Fuzeng Zhang Tingting Wang Yingbang Yao |
| author_sort | Bing Luo |
| collection | DOAJ |
| description | Well-dispersed and uniform porous ellipsoidal-shaped bismuth oxyhalides (nominal composition: 80%BiOCl/20%BiOI) microspheres were obtained by a facile solvothermal method, in which process the use of polyvinylpyrrolidone (PVP) as template agent was found to be crucial. At 150 °C, elliptical porous particles with a particle size of 0.79 μm were formed. Instead of forming solid solutions, the study of X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) shows that the prepared 80%BiOCl/20%BiOI microspheres are composite of BiOCl and BiOI in nature and the obtained crystallite size is about 5.6 nm. The optical bandgap of 80%BiOCl/20%BiOI was measured to be 2.93 eV, which is between the bandgap values of BiOCl and BiOI. The 80%BiOCl/20%BiOI microspheres were able to decompose various organic dyes (rhodamine B-RhB, methyl orange-MO, methylene blue-MB, methyl violet-MV) under an illuminated condition with the degradation rate in the order of RhB > MB > MV > MO, and 98% of RhB can be degraded in 90 min. Radical scavenger tests showed that photogenerated holes are the main active species for the photocatalytic decomposition of all of the tested organic dyes. Our results show that the obtained porous ellipsoidal-shaped 80%BiOCl/20%BiOI microspheres are promising for the degradation of various organic pollutants under the illumination of visible light. |
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| format | Article |
| id | doaj.art-17c8e6cfe09543d484163cac5f2cf8ff |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:35:13Z |
| publishDate | 2022-09-01 |
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| series | Materials |
| spelling | doaj.art-17c8e6cfe09543d484163cac5f2cf8ff2023-11-23T13:34:26ZengMDPI AGMaterials1996-19442022-09-011517603510.3390/ma15176035Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic PerformancesBing Luo0Canfeng Wu1Fuzeng Zhang2Tingting Wang3Yingbang Yao4China Southern Power Grid, Guangzhou 510623, ChinaSchool of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, ChinaChina Southern Power Grid, Guangzhou 510623, ChinaChina Southern Power Grid, Guangzhou 510623, ChinaSchool of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, ChinaWell-dispersed and uniform porous ellipsoidal-shaped bismuth oxyhalides (nominal composition: 80%BiOCl/20%BiOI) microspheres were obtained by a facile solvothermal method, in which process the use of polyvinylpyrrolidone (PVP) as template agent was found to be crucial. At 150 °C, elliptical porous particles with a particle size of 0.79 μm were formed. Instead of forming solid solutions, the study of X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) shows that the prepared 80%BiOCl/20%BiOI microspheres are composite of BiOCl and BiOI in nature and the obtained crystallite size is about 5.6 nm. The optical bandgap of 80%BiOCl/20%BiOI was measured to be 2.93 eV, which is between the bandgap values of BiOCl and BiOI. The 80%BiOCl/20%BiOI microspheres were able to decompose various organic dyes (rhodamine B-RhB, methyl orange-MO, methylene blue-MB, methyl violet-MV) under an illuminated condition with the degradation rate in the order of RhB > MB > MV > MO, and 98% of RhB can be degraded in 90 min. Radical scavenger tests showed that photogenerated holes are the main active species for the photocatalytic decomposition of all of the tested organic dyes. Our results show that the obtained porous ellipsoidal-shaped 80%BiOCl/20%BiOI microspheres are promising for the degradation of various organic pollutants under the illumination of visible light.https://www.mdpi.com/1996-1944/15/17/6035bismuth oxyhalidesphotocatalytic degradationholesmicrospheres |
| spellingShingle | Bing Luo Canfeng Wu Fuzeng Zhang Tingting Wang Yingbang Yao Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances Materials bismuth oxyhalides photocatalytic degradation holes microspheres |
| title | Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances |
| title_full | Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances |
| title_fullStr | Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances |
| title_full_unstemmed | Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances |
| title_short | Preparation of Porous Ellipsoidal Bismuth Oxyhalide Microspheres and Their Photocatalytic Performances |
| title_sort | preparation of porous ellipsoidal bismuth oxyhalide microspheres and their photocatalytic performances |
| topic | bismuth oxyhalides photocatalytic degradation holes microspheres |
| url | https://www.mdpi.com/1996-1944/15/17/6035 |
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