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Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation
By combining the plasmon resonance of Ag nanoparticles and orientation effects of ZIF-8, as well as the visible-light activity of g-C(3)N(4), we constructed a direct Z-scheme heterojunction with a co-existing Ag(+)/Ag(0) system by an in situ coprecipitation method. The presence of Ag(+)/Ag(0) on the...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9202599/ https://www.ncbi.nlm.nih.gov/pubmed/35765331 http://dx.doi.org/10.1039/d2ra02194c |
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author | Guo, Xin He, Siyuan Meng, Zhe Wang, Yinghui Peng, Yuan |
author_facet | Guo, Xin He, Siyuan Meng, Zhe Wang, Yinghui Peng, Yuan |
author_sort | Guo, Xin |
collection | PubMed |
description | By combining the plasmon resonance of Ag nanoparticles and orientation effects of ZIF-8, as well as the visible-light activity of g-C(3)N(4), we constructed a direct Z-scheme heterojunction with a co-existing Ag(+)/Ag(0) system by an in situ coprecipitation method. The presence of Ag(+)/Ag(0) on the surface of ZIF-8 was confirmed by the exchange of Ag(+) and Zn(2+) ions. This promoted the reduction of the band gap of ZIF-8, according to X-ray diffraction (XRD) and X-ray photoelectron spectroscopy. The results reveal that the 12 wt% Ag@ZIF-8/g-C(3)N(4) nanocomposite presented the best adsorptive–photocatalytic activity for the degradation of multi-residue antibiotics under visible light irradiation for 60 min. Its degradation efficiency reached 90%, and its average apparent reaction rate constant was 10.27 times that of pure g-C(3)N(4). In the radical scavenger experiments, ˙O(2)(−) and ˙OH were shown to be important in the process of photocatalytic degradation. In addition, we proposed a possible direct Z-scheme photocatalytic mechanism, that is, an internal electric field was formed to compensate the mediators between the interfaces of Ag@ZIF-8 and g-C(3)N(4). This improvement can be attributed to the direct Z-scheme heterojunction system fabricated between Ag@ZIF-8 and g-C(3)N(4). This can accelerate photogenerated electron–hole separation and the redox capability of Ag@ZIF-8/g-C(3)N(4). The integration of the adsorption and photocatalytic degradation of various antibiotics is a promising approach. ZIF-8 has been widely used in the integrated adsorptive–photocatalytic removal of various antibiotics due to its large surface area, high orientation adsorption capacity. Therefore, this study provides new insights into the design of enhanced redox capacity for the efficient degradation of multiple antibiotics under visible-light irradiation. |
format | Online Article Text |
id | pubmed-9202599 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-92025992022-06-27 Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation Guo, Xin He, Siyuan Meng, Zhe Wang, Yinghui Peng, Yuan RSC Adv Chemistry By combining the plasmon resonance of Ag nanoparticles and orientation effects of ZIF-8, as well as the visible-light activity of g-C(3)N(4), we constructed a direct Z-scheme heterojunction with a co-existing Ag(+)/Ag(0) system by an in situ coprecipitation method. The presence of Ag(+)/Ag(0) on the surface of ZIF-8 was confirmed by the exchange of Ag(+) and Zn(2+) ions. This promoted the reduction of the band gap of ZIF-8, according to X-ray diffraction (XRD) and X-ray photoelectron spectroscopy. The results reveal that the 12 wt% Ag@ZIF-8/g-C(3)N(4) nanocomposite presented the best adsorptive–photocatalytic activity for the degradation of multi-residue antibiotics under visible light irradiation for 60 min. Its degradation efficiency reached 90%, and its average apparent reaction rate constant was 10.27 times that of pure g-C(3)N(4). In the radical scavenger experiments, ˙O(2)(−) and ˙OH were shown to be important in the process of photocatalytic degradation. In addition, we proposed a possible direct Z-scheme photocatalytic mechanism, that is, an internal electric field was formed to compensate the mediators between the interfaces of Ag@ZIF-8 and g-C(3)N(4). This improvement can be attributed to the direct Z-scheme heterojunction system fabricated between Ag@ZIF-8 and g-C(3)N(4). This can accelerate photogenerated electron–hole separation and the redox capability of Ag@ZIF-8/g-C(3)N(4). The integration of the adsorption and photocatalytic degradation of various antibiotics is a promising approach. ZIF-8 has been widely used in the integrated adsorptive–photocatalytic removal of various antibiotics due to its large surface area, high orientation adsorption capacity. Therefore, this study provides new insights into the design of enhanced redox capacity for the efficient degradation of multiple antibiotics under visible-light irradiation. The Royal Society of Chemistry 2022-06-16 /pmc/articles/PMC9202599/ /pubmed/35765331 http://dx.doi.org/10.1039/d2ra02194c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Guo, Xin He, Siyuan Meng, Zhe Wang, Yinghui Peng, Yuan Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
title | Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
title_full | Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
title_fullStr | Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
title_full_unstemmed | Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
title_short | Ag@ZIF-8/g-C(3)N(4) Z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
title_sort | ag@zif-8/g-c(3)n(4) z-scheme photocatalyst for the enhanced removal of multiple classes of antibiotics by integrated adsorption and photocatalytic degradation under visible light irradiation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9202599/ https://www.ncbi.nlm.nih.gov/pubmed/35765331 http://dx.doi.org/10.1039/d2ra02194c |
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