Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Lu, Na, Sun, Menghan, Wei, Xiaoming, Zhang, Peng, Zhang, Zhenyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
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
_version_ 1783595820668420096
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
work_keys_str_mv AT luna facilesynthesisoflacunarykeggintypephosphotungstatesdecoratedgc3n4nanosheetsforenhancingphotocatalytich2generation
AT sunmenghan facilesynthesisoflacunarykeggintypephosphotungstatesdecoratedgc3n4nanosheetsforenhancingphotocatalytich2generation
AT weixiaoming facilesynthesisoflacunarykeggintypephosphotungstatesdecoratedgc3n4nanosheetsforenhancingphotocatalytich2generation
AT zhangpeng facilesynthesisoflacunarykeggintypephosphotungstatesdecoratedgc3n4nanosheetsforenhancingphotocatalytich2generation
AT zhangzhenyi facilesynthesisoflacunarykeggintypephosphotungstatesdecoratedgc3n4nanosheetsforenhancingphotocatalytich2generation