Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping
Anatase/rutile heterojunctions were prepared using the sol–gel method and modified by La/Sn single doping and co-doping. Sn doping promoted the transformation from anatase to rutile, while La doping inhibited the phase transformation. La and Sn co-doping showed an inhibitory effect. The co-doping of...
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MDPI AG
2022-09-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/23/19/11339 |
| _version_ | 1797479112876490752 |
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| author | Xiaodong Zhu Fengqiu Qin Lili He Yu Jiao Wei Feng |
| author_facet | Xiaodong Zhu Fengqiu Qin Lili He Yu Jiao Wei Feng |
| author_sort | Xiaodong Zhu |
| collection | DOAJ |
| description | Anatase/rutile heterojunctions were prepared using the sol–gel method and modified by La/Sn single doping and co-doping. Sn doping promoted the transformation from anatase to rutile, while La doping inhibited the phase transformation. La and Sn co-doping showed an inhibitory effect. The co-doping of La and Sn did not increase visible-light absorption, but exhibited a synergistic effect on inhibiting the recombination of photogenerated electrons and holes, which improved the photocatalytic activity on the basis of single-element modification. The first-order reaction rate constant of La/Sn co-doped sample was 0.027 min<sup>−1</sup>, which is 1.8 times higher than that of pure TiO<sub>2</sub> (0.015 min<sup>−1</sup>). Meanwhile, the mechanism of photodegradation of methylene blue (MB) by La/Sn co-doped anatase/rutile heterojunctions was discussed through electrochemical measurements and free-radical trapping experiments. |
| first_indexed | 2024-03-09T21:41:03Z |
| format | Article |
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| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-09T21:41:03Z |
| publishDate | 2022-09-01 |
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| spelling | doaj.art-6c3e0be08064479bb605d56a0e804a082023-11-23T20:31:24ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672022-09-0123191133910.3390/ijms231911339Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-DopingXiaodong Zhu0Fengqiu Qin1Lili He2Yu Jiao3Wei Feng4School of Mechanical Engineering, Chengdu University, Chengdu 610106, ChinaSchool of Mechanical Engineering, Chengdu University, Chengdu 610106, ChinaSchool of Mechanical Engineering, Chengdu University, Chengdu 610106, ChinaSchool of Science, Xichang University, Xichang 615013, ChinaSchool of Mechanical Engineering, Chengdu University, Chengdu 610106, ChinaAnatase/rutile heterojunctions were prepared using the sol–gel method and modified by La/Sn single doping and co-doping. Sn doping promoted the transformation from anatase to rutile, while La doping inhibited the phase transformation. La and Sn co-doping showed an inhibitory effect. The co-doping of La and Sn did not increase visible-light absorption, but exhibited a synergistic effect on inhibiting the recombination of photogenerated electrons and holes, which improved the photocatalytic activity on the basis of single-element modification. The first-order reaction rate constant of La/Sn co-doped sample was 0.027 min<sup>−1</sup>, which is 1.8 times higher than that of pure TiO<sub>2</sub> (0.015 min<sup>−1</sup>). Meanwhile, the mechanism of photodegradation of methylene blue (MB) by La/Sn co-doped anatase/rutile heterojunctions was discussed through electrochemical measurements and free-radical trapping experiments.https://www.mdpi.com/1422-0067/23/19/11339anatase/rutile heterojunctionssol–gel methodLa/Sn co-dopingphotocatalytic activity |
| spellingShingle | Xiaodong Zhu Fengqiu Qin Lili He Yu Jiao Wei Feng Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping International Journal of Molecular Sciences anatase/rutile heterojunctions sol–gel method La/Sn co-doping photocatalytic activity |
| title | Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping |
| title_full | Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping |
| title_fullStr | Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping |
| title_full_unstemmed | Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping |
| title_short | Enhanced Photocatalytic Activity of Anatase/Rutile Heterojunctions by Lanthanum and Tin Co-Doping |
| title_sort | enhanced photocatalytic activity of anatase rutile heterojunctions by lanthanum and tin co doping |
| topic | anatase/rutile heterojunctions sol–gel method La/Sn co-doping photocatalytic activity |
| url | https://www.mdpi.com/1422-0067/23/19/11339 |
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