Cargando…
Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation
Semiconductor photocatalysis is widely proposed for decomposing multiple pollutants via photo-generated oxidative species. However, the photocatalytic degradation performance in practical settings still remains unsatisfactory due to the limited production of active oxidative species (AOS). In this w...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057696/ https://www.ncbi.nlm.nih.gov/pubmed/35519198 http://dx.doi.org/10.1039/d0ra08116g |
_version_ | 1784697957211176960 |
---|---|
author | Gao, Xintong Zhang, Shuai Liu, Jingchao Xu, Shiqi Li, Zenghe |
author_facet | Gao, Xintong Zhang, Shuai Liu, Jingchao Xu, Shiqi Li, Zenghe |
author_sort | Gao, Xintong |
collection | PubMed |
description | Semiconductor photocatalysis is widely proposed for decomposing multiple pollutants via photo-generated oxidative species. However, the photocatalytic degradation performance in practical settings still remains unsatisfactory due to the limited production of active oxidative species (AOS). In this work, a defect engineering strategy was developed to explore the superiority of oxygen vacancies (Vo) and their structural regulation to enhance AOS production for boosting photodegradation. Taking anatase TiO(2) as a model photocatalyst, ultrathin TiO(2) nanosheets containing abundant Vo and appropriate Fe doping exhibited an unprecedented 134 times higher activity in the degradation of Rhodamine B (RhB) (rate as high as 0.3073 min(−1)) than bulk anatase and were superior to most reported photocatalysts. The defect-rich ultrathin TiO(2) nanosheets could be further applied in high-efficiency degradation of tetracycline hydrochloride (TC-HCl) with the degradation rate of 0.0423 min(−1). The in situ electron paramagnetic resonance, advanced spectroscopic characterization and electrochemical measurement revealed the key role of Vo and Fe doping in facilitating the production of photo-generated holes and superoxide radicals (˙O(2)(−)) that were identified to be effective to decompose both RhB and TC-HCl. This research provides insight into defect engineering promoting AOS generation and gives inspiration for the design of efficient photocatalysts for photooxidation applications. |
format | Online Article Text |
id | pubmed-9057696 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90576962022-05-04 Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation Gao, Xintong Zhang, Shuai Liu, Jingchao Xu, Shiqi Li, Zenghe RSC Adv Chemistry Semiconductor photocatalysis is widely proposed for decomposing multiple pollutants via photo-generated oxidative species. However, the photocatalytic degradation performance in practical settings still remains unsatisfactory due to the limited production of active oxidative species (AOS). In this work, a defect engineering strategy was developed to explore the superiority of oxygen vacancies (Vo) and their structural regulation to enhance AOS production for boosting photodegradation. Taking anatase TiO(2) as a model photocatalyst, ultrathin TiO(2) nanosheets containing abundant Vo and appropriate Fe doping exhibited an unprecedented 134 times higher activity in the degradation of Rhodamine B (RhB) (rate as high as 0.3073 min(−1)) than bulk anatase and were superior to most reported photocatalysts. The defect-rich ultrathin TiO(2) nanosheets could be further applied in high-efficiency degradation of tetracycline hydrochloride (TC-HCl) with the degradation rate of 0.0423 min(−1). The in situ electron paramagnetic resonance, advanced spectroscopic characterization and electrochemical measurement revealed the key role of Vo and Fe doping in facilitating the production of photo-generated holes and superoxide radicals (˙O(2)(−)) that were identified to be effective to decompose both RhB and TC-HCl. This research provides insight into defect engineering promoting AOS generation and gives inspiration for the design of efficient photocatalysts for photooxidation applications. The Royal Society of Chemistry 2020-11-09 /pmc/articles/PMC9057696/ /pubmed/35519198 http://dx.doi.org/10.1039/d0ra08116g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Gao, Xintong Zhang, Shuai Liu, Jingchao Xu, Shiqi Li, Zenghe Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation |
title | Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation |
title_full | Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation |
title_fullStr | Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation |
title_full_unstemmed | Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation |
title_short | Enhanced active oxidative species generation over Fe-doped defective TiO(2) nanosheets for boosted photodegradation |
title_sort | enhanced active oxidative species generation over fe-doped defective tio(2) nanosheets for boosted photodegradation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057696/ https://www.ncbi.nlm.nih.gov/pubmed/35519198 http://dx.doi.org/10.1039/d0ra08116g |
work_keys_str_mv | AT gaoxintong enhancedactiveoxidativespeciesgenerationoverfedopeddefectivetio2nanosheetsforboostedphotodegradation AT zhangshuai enhancedactiveoxidativespeciesgenerationoverfedopeddefectivetio2nanosheetsforboostedphotodegradation AT liujingchao enhancedactiveoxidativespeciesgenerationoverfedopeddefectivetio2nanosheetsforboostedphotodegradation AT xushiqi enhancedactiveoxidativespeciesgenerationoverfedopeddefectivetio2nanosheetsforboostedphotodegradation AT lizenghe enhancedactiveoxidativespeciesgenerationoverfedopeddefectivetio2nanosheetsforboostedphotodegradation |