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Post-annealed graphite carbon nitride nanoplates obtained by sugar-assisted exfoliation with improved visible-light photocatalytic performance
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| Title: | Post-annealed graphite carbon nitride nanoplates obtained by sugar-assisted exfoliation with improved visible-light photocatalytic performance |
| Authors: | Liu, Wei Browse this author | | Yanase, Takashi Browse this author | | Iwasa, Nobuhiro Browse this author | | Mukai, Shin Browse this author | | Iwamura, Shinichiro Browse this author | | Nagahama, Taro Browse this author →KAKEN DB | | Shimada, Toshihiro Browse this author →KAKEN DB |
| Keywords: | g-C3N4 nanoplates | | Co-grinding | | Sugar | | Thermal treatment | | Photocatalytic activity |
| Issue Date: | 1-May-2020 |
| Publisher: | Elsevier |
| Journal Title: | Journal of colloid and interface science |
| Volume: | 567 |
| Start Page: | 369 |
| End Page: | 378 |
| Publisher DOI: | 10.1016/j.jcis.2020.02.031 |
| Abstract: | Two-dimensional (2D) graphitic carbon nitride (g-C3N4) nanoplates (CNNP) have become a hot research topic in photocatalysis due to their small thickness and large specific surface area that favors charge transport and catalytic surface reactions. However, the wide application of 2D g-C3N4 nanoplates prepared by ordinary methods suffers from increased band gaps with a poor solar harvesting capability caused by the strong quantum confinement effect and reduced conjugation distance. In this paper, a facile approach of exfoliation and the following fast thermal treatment of the bulk g-C3N4 is proposed to obtain a porous few-layered g-C3N4 with nitrogen defects. Due to the preferable crystal, textural, optical and electronic structures, the as-obtained porous CNNP demonstrated a significantly improved photocatalytic activity towards water splitting than the bulk g-C3N4 and even the 3 nm-thick CNNP obtained by sugarassisted exfoliation of the bulk g-C3N4. The difference in the enhancement factors between the H2O splitting and organic decomposition has revealed the effect of N defects. This study offers insightful outlooks on the scalable fabrication of a porous few-layered structure with a promoted photocatalytic performance. (C) 2020 Elsevier Inc. All rights reserved. |
| Rights: | ©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/84423 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 島田 敏宏
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