Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution
Abstract Graphitic carbon nitride (g-C3N4)-based photocatalysts have shown great potential in the splitting of water. However, the intrinsic drawbacks of g-C3N4, such as low surface area, poor diffusion, and charge separation efficiency, remain as the bottleneck to achieve highly efficient hydrogen...
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Online Access: | https://doi.org/10.1007/s40820-020-00571-6 |
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doaj-75aea7119a2b49ff852145c198169a062021-01-10T12:56:40ZengSpringerOpenNano-Micro Letters2311-67062150-55512021-01-0113111210.1007/s40820-020-00571-6Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen EvolutionYunyan Wu0Pan Xiong1Jianchun Wu2Zengliang Huang3Jingwen Sun4Qinqin Liu5Xiaonong Cheng6Juan Yang7Junwu Zhu8Yazhou Zhou9Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and TechnologyKey Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Jiangsu UniversitySchool of Materials Science and Engineering, Jiangsu UniversityKey Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Jiangsu UniversitySchool of Materials Science and Engineering, Jiangsu UniversityKey Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and TechnologyKey Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Jiangsu UniversityAbstract Graphitic carbon nitride (g-C3N4)-based photocatalysts have shown great potential in the splitting of water. However, the intrinsic drawbacks of g-C3N4, such as low surface area, poor diffusion, and charge separation efficiency, remain as the bottleneck to achieve highly efficient hydrogen evolution. Here, a hollow oxygen-incorporated g-C3N4 nanosheet (OCN) with an improved surface area of 148.5 m2 g−1 is fabricated by the multiple thermal treatments under the N2/O2 atmosphere, wherein the C–O bonds are formed through two ways of physical adsorption and doping. The physical characterization and theoretical calculation indicate that the O-adsorption can promote the generation of defects, leading to the formation of hollow morphology, while the O-doping results in reduced band gap of g-C3N4. The optimized OCN shows an excellent photocatalytic hydrogen evolution activity of 3519.6 μmol g−1 h−1 for ~ 20 h, which is over four times higher than that of g-C3N4 (850.1 μmol g−1 h−1) and outperforms most of the reported g-C3N4 catalysts.https://doi.org/10.1007/s40820-020-00571-6Graphitic carbon nitride nanosheetHollow morphologyOxygen incorporatingMultiple thermal treatmentPhotocatalytic hydrogen evolution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yunyan Wu Pan Xiong Jianchun Wu Zengliang Huang Jingwen Sun Qinqin Liu Xiaonong Cheng Juan Yang Junwu Zhu Yazhou Zhou |
spellingShingle |
Yunyan Wu Pan Xiong Jianchun Wu Zengliang Huang Jingwen Sun Qinqin Liu Xiaonong Cheng Juan Yang Junwu Zhu Yazhou Zhou Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution Nano-Micro Letters Graphitic carbon nitride nanosheet Hollow morphology Oxygen incorporating Multiple thermal treatment Photocatalytic hydrogen evolution |
author_facet |
Yunyan Wu Pan Xiong Jianchun Wu Zengliang Huang Jingwen Sun Qinqin Liu Xiaonong Cheng Juan Yang Junwu Zhu Yazhou Zhou |
author_sort |
Yunyan Wu |
title |
Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution |
title_short |
Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution |
title_full |
Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution |
title_fullStr |
Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution |
title_full_unstemmed |
Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution |
title_sort |
band engineering and morphology control of oxygen-incorporated graphitic carbon nitride porous nanosheets for highly efficient photocatalytic hydrogen evolution |
publisher |
SpringerOpen |
series |
Nano-Micro Letters |
issn |
2311-6706 2150-5551 |
publishDate |
2021-01-01 |
description |
Abstract Graphitic carbon nitride (g-C3N4)-based photocatalysts have shown great potential in the splitting of water. However, the intrinsic drawbacks of g-C3N4, such as low surface area, poor diffusion, and charge separation efficiency, remain as the bottleneck to achieve highly efficient hydrogen evolution. Here, a hollow oxygen-incorporated g-C3N4 nanosheet (OCN) with an improved surface area of 148.5 m2 g−1 is fabricated by the multiple thermal treatments under the N2/O2 atmosphere, wherein the C–O bonds are formed through two ways of physical adsorption and doping. The physical characterization and theoretical calculation indicate that the O-adsorption can promote the generation of defects, leading to the formation of hollow morphology, while the O-doping results in reduced band gap of g-C3N4. The optimized OCN shows an excellent photocatalytic hydrogen evolution activity of 3519.6 μmol g−1 h−1 for ~ 20 h, which is over four times higher than that of g-C3N4 (850.1 μmol g−1 h−1) and outperforms most of the reported g-C3N4 catalysts. |
topic |
Graphitic carbon nitride nanosheet Hollow morphology Oxygen incorporating Multiple thermal treatment Photocatalytic hydrogen evolution |
url |
https://doi.org/10.1007/s40820-020-00571-6 |
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