Facile synthesis and microstructure modulation of crystalline polymeric carbon nitride for highly boosted photocatalytic hydrogen evolution

Wenbin Wang; Zhu Shu; Jun Zhou; Dawei Meng; Zhengliang Zhao; Tiantian Li

doi:10.1039/D0TA01584A

Facile synthesis and microstructure modulation of crystalline polymeric carbon nitride for highly boosted photocatalytic hydrogen evolution†

Wenbin Wang,^a Zhu Shu,

*^ab Jun Zhou,^ab Dawei Meng,^a Zhengliang Zhao^a and Tiantian Li^c

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* Corresponding authors

^a Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
E-mail: shuzhu@cug.edu.cn

^b Zhejiang Institute, China University of Geosciences, Hangzhou 311305, China

^c College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China

Abstract

Upgrading the melon-based bulk polymeric carbon nitride (PCN) into tri-s-triazine-based crystalline PCN has been proved effective and crucial to improve its intrinsic photocatalytic activity. Currently, facilitating the synthesis process of crystalline PCN and further optimizing its structure are challenging and have attracted increasing attentions. This work realized the facile one-step synthesis of K⁺-doped tri-s-triazine-based crystalline PCN with delicate box-shapes (KCCNB-x), by heating melamine with KCl using a vapor-deposition approach. KCCNB-30 demonstrated greatly boosted visible-light photocatalytic H₂ evolution (HER) activity which is 33 times that of BCN. This benefits mainly from the facilitated photo-exciton transfer in the tri-s-triazine-based crystalline framework as well as the further enhanced light absorption in the box shape of KCCNB-30. Additionally, the versatility of this strategy was proved via successfully synthesizing Na⁺-doped tri-s-triazine-based crystalline PCN with box-shapes.

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DOI: https://doi.org/10.1039/D0TA01584A
Article type: Paper
Submitted: 10 Feb 2020
Accepted: 18 Mar 2020
First published: 26 Mar 2020

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J. Mater. Chem. A, 2020,8, 6785-6794

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Facile synthesis and microstructure modulation of crystalline polymeric carbon nitride for highly boosted photocatalytic hydrogen evolution

W. Wang, Z. Shu, J. Zhou, D. Meng, Z. Zhao and T. Li, J. Mater. Chem. A, 2020, 8, 6785 DOI: 10.1039/D0TA01584A

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Journal of Materials Chemistry A

Facile synthesis and microstructure modulation of crystalline polymeric carbon nitride for highly boosted photocatalytic hydrogen evolution†

Abstract

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Facile synthesis and microstructure modulation of crystalline polymeric carbon nitride for highly boosted photocatalytic hydrogen evolution

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