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Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation
In this work, the lacunary Keggin-type phosphotungstates of [PW(9)O(34)](9-) (PW(9)) clusters were loaded onto the g-C(3)N(4) nanosheets (NSs) to synthesize the phosphotungstate clusters-decorated 2D heterojunction photocatalysts by using the electrostatic-force driven self-assembly process. The sur...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564915/ https://www.ncbi.nlm.nih.gov/pubmed/32872550 http://dx.doi.org/10.3390/polym12091961 |
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author | Lu, Na Sun, Menghan Wei, Xiaoming Zhang, Peng Zhang, Zhenyi |
author_facet | Lu, Na Sun, Menghan Wei, Xiaoming Zhang, Peng Zhang, Zhenyi |
author_sort | Lu, Na |
collection | PubMed |
description | In this work, the lacunary Keggin-type phosphotungstates of [PW(9)O(34)](9-) (PW(9)) clusters were loaded onto the g-C(3)N(4) nanosheets (NSs) to synthesize the phosphotungstate clusters-decorated 2D heterojunction photocatalysts by using the electrostatic-force driven self-assembly process. The surface charge polarity of g-C(3)N(4) NSs was changed from a negative to a positive charge through the acidizing treatment. The positively-charged g-C(3)N(4) NSs allowed the negatively-charged PW(9) clusters to be adsorbed and deposited onto the g-C(3)N(4) NSs, forming the PW(9)/g-C(3)N(4) heterojunction NSs. The as-synthesized samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and UV-VIS absorption spectra, respectively. The photocatalytic activity tests indicated that, upon simulated sunlight irradiation, the photocatalytic H(2)-generation rate of PW(9)/g-C(3)N(4) heterojunction NSs (~23.8 μmol h(−1)) was ~3.3 times higher than that of the pure g-C(3)N(4) NSs (~7.3 μmol h(−1)). The enhanced photocatalytic activity of PW(9) cluster-decorated g-C(3)N(4) NSs could be attributed to the enhanced separation process of the photoinduced charge-carriers, due to the Z-scheme-mediate charge transfer behavior across their hetero-interface. |
format | Online Article Text |
id | pubmed-7564915 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75649152020-10-28 Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation Lu, Na Sun, Menghan Wei, Xiaoming Zhang, Peng Zhang, Zhenyi Polymers (Basel) Article In this work, the lacunary Keggin-type phosphotungstates of [PW(9)O(34)](9-) (PW(9)) clusters were loaded onto the g-C(3)N(4) nanosheets (NSs) to synthesize the phosphotungstate clusters-decorated 2D heterojunction photocatalysts by using the electrostatic-force driven self-assembly process. The surface charge polarity of g-C(3)N(4) NSs was changed from a negative to a positive charge through the acidizing treatment. The positively-charged g-C(3)N(4) NSs allowed the negatively-charged PW(9) clusters to be adsorbed and deposited onto the g-C(3)N(4) NSs, forming the PW(9)/g-C(3)N(4) heterojunction NSs. The as-synthesized samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and UV-VIS absorption spectra, respectively. The photocatalytic activity tests indicated that, upon simulated sunlight irradiation, the photocatalytic H(2)-generation rate of PW(9)/g-C(3)N(4) heterojunction NSs (~23.8 μmol h(−1)) was ~3.3 times higher than that of the pure g-C(3)N(4) NSs (~7.3 μmol h(−1)). The enhanced photocatalytic activity of PW(9) cluster-decorated g-C(3)N(4) NSs could be attributed to the enhanced separation process of the photoinduced charge-carriers, due to the Z-scheme-mediate charge transfer behavior across their hetero-interface. MDPI 2020-08-29 /pmc/articles/PMC7564915/ /pubmed/32872550 http://dx.doi.org/10.3390/polym12091961 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lu, Na Sun, Menghan Wei, Xiaoming Zhang, Peng Zhang, Zhenyi Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation |
title | Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation |
title_full | Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation |
title_fullStr | Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation |
title_full_unstemmed | Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation |
title_short | Facile Synthesis of Lacunary Keggin-Type Phosphotungstates-Decorated g-C(3)N(4) Nanosheets for Enhancing Photocatalytic H(2) Generation |
title_sort | facile synthesis of lacunary keggin-type phosphotungstates-decorated g-c(3)n(4) nanosheets for enhancing photocatalytic h(2) generation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564915/ https://www.ncbi.nlm.nih.gov/pubmed/32872550 http://dx.doi.org/10.3390/polym12091961 |
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