One-step supramolecular preorganization constructed crinkly graphitic carbon nitride nanosheets with enhanced photocatalytic activity

Songcan Wang ¹Yuelin Li ²Xin Wang ¹Guohao Zi ²Chenyang Zhou ²Boyan Liu ¹Gang Liu ³Lianzhou Wang ⁴Wei Huang¹

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作者信息

1. Frontiers Science Center for Flexible Electronics,Xi'an Institute of Flexible Electronics(IFE),Xi'an Institute of Biomedical Materials&Engineering,Northwestern Polytechnical University,127 West Youyi Road,Xi'an 710072,China
2. Frontiers Science Center for Flexible Electronics,Xi'an Institute of Flexible Electronics(IFE),Xi'an Institute of Biomedical Materials&Engineering,Northwestern Polytechnical University,127 West Youyi Road,Xi'an 710072,China;Honors College,Northwestern Polytechnical University,127 West Youyi Road,Xi'an 710072,China
3. Shenyang National Laboratory for Materials Science,Institute of Metal Research Chinese Academy of Sciences,72 Wenhua Road,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,72 Wenhua Road,Shenyang 110016,China
4. Nanomaterials Centre,School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology,The University of Queensland,QLD 4072,Australia
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Abstract

Here we report a new one-step thermal polycondensation process to form crinkly graphitic carbon nitride nanosheets(CGCNNs)via supramolecular preorganization,using a mixture of urea and melamine as the starting material.Systematical studies reveal that the newly developed CGCNNs significantly strengthen the optical absorption,widen the bandgap,and increase the Hall mobility and carrier density compared to that of its bulk counterpart,regardless of the similar chemical composition and structure.As a result,the photocatalytic hydrogen production rate is improved by 7 times.Moreover,Na doping of CGCNNs can further promote its photocatalytic activity,leading to an excellent photocatalytic hydrogen production rate of 250.9 μmol h-1,which is approximately 10.5 times higher than its bulk counterpart.Moreover,an impressive apparent quantum efficiency of 19.12％is achieved at 420 nm.This study provides a facile strategy for the design of efficient low-cost carbon-nitride-based photocatalysts for solar fuel production.

Key words

Carbon nitride/Supramolecular preorganization/Hall mobility/Na doping/Solar hydrogen

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基金项目

Na-tional Natural Science Foundation of China(52002328)

Fundamental Research Funds for the Central Universities,the Joint Research Funds of Department of Science&Technology of Shaa(2020GXLH-Z-018)

Australian Research Council through its Discovery Projects DPs()

Laureate Fellowship()

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量54

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