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Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light
The development of photocatalysts that efficiently degrade organic pollutants is an important environmental-remediation objective. To that end, we report a strategy for the ready fabrication of oxygen-doped graphitic carbon nitride (CN) with engendered nitrogen deficiencies. The addition of KOH and...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795803/ https://www.ncbi.nlm.nih.gov/pubmed/31619695 http://dx.doi.org/10.1038/s41598-019-49949-6 |
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author | Katsumata, Hideyuki Higashi, Fumiya Kobayashi, Yuya Tateishi, Ikki Furukawa, Mai Kaneco, Satoshi |
author_facet | Katsumata, Hideyuki Higashi, Fumiya Kobayashi, Yuya Tateishi, Ikki Furukawa, Mai Kaneco, Satoshi |
author_sort | Katsumata, Hideyuki |
collection | PubMed |
description | The development of photocatalysts that efficiently degrade organic pollutants is an important environmental-remediation objective. To that end, we report a strategy for the ready fabrication of oxygen-doped graphitic carbon nitride (CN) with engendered nitrogen deficiencies. The addition of KOH and oxalic acid during the thermal condensation of urea led to a material that exhibits a significantly higher pseudo-first-order rate constant for the degradation of bisphenol A (BPA) (0.0225 min(−1)) compared to that of CN (0.00222 min(−1)). The enhanced photocatalytic activity for the degradation of BPA exhibited by the dual-defect-modified CN (Bt-OA-CN) is ascribable to a considerable red-shift in its light absorption compared to that of CN, as well as its modulated energy band structure and more-efficient charge separation. Furthermore, we confirmed that the in-situ-formed cyano groups in the Bt-OA-CN photocatalyst act as strong electron-withdrawing groups that efficiently separate and transfer photo-generated charge carriers to the surface of the photocatalyst. This study provides novel insight into the in-situ dual-defect strategy for g-C(3)N(4), which is extendable to the modification of other photocatalysts; it also introduces Bt-OA-CN as a potential highly efficient visible-light-responsive photocatalyst for use in environmental-remediation applications. |
format | Online Article Text |
id | pubmed-6795803 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-67958032019-10-25 Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light Katsumata, Hideyuki Higashi, Fumiya Kobayashi, Yuya Tateishi, Ikki Furukawa, Mai Kaneco, Satoshi Sci Rep Article The development of photocatalysts that efficiently degrade organic pollutants is an important environmental-remediation objective. To that end, we report a strategy for the ready fabrication of oxygen-doped graphitic carbon nitride (CN) with engendered nitrogen deficiencies. The addition of KOH and oxalic acid during the thermal condensation of urea led to a material that exhibits a significantly higher pseudo-first-order rate constant for the degradation of bisphenol A (BPA) (0.0225 min(−1)) compared to that of CN (0.00222 min(−1)). The enhanced photocatalytic activity for the degradation of BPA exhibited by the dual-defect-modified CN (Bt-OA-CN) is ascribable to a considerable red-shift in its light absorption compared to that of CN, as well as its modulated energy band structure and more-efficient charge separation. Furthermore, we confirmed that the in-situ-formed cyano groups in the Bt-OA-CN photocatalyst act as strong electron-withdrawing groups that efficiently separate and transfer photo-generated charge carriers to the surface of the photocatalyst. This study provides novel insight into the in-situ dual-defect strategy for g-C(3)N(4), which is extendable to the modification of other photocatalysts; it also introduces Bt-OA-CN as a potential highly efficient visible-light-responsive photocatalyst for use in environmental-remediation applications. Nature Publishing Group UK 2019-10-16 /pmc/articles/PMC6795803/ /pubmed/31619695 http://dx.doi.org/10.1038/s41598-019-49949-6 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Katsumata, Hideyuki Higashi, Fumiya Kobayashi, Yuya Tateishi, Ikki Furukawa, Mai Kaneco, Satoshi Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
title | Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
title_full | Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
title_fullStr | Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
title_full_unstemmed | Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
title_short | Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
title_sort | dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795803/ https://www.ncbi.nlm.nih.gov/pubmed/31619695 http://dx.doi.org/10.1038/s41598-019-49949-6 |
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