Issue 24, 2023

S-doped C3N5 derived from thiadiazole for efficient photocatalytic hydrogen evolution

Abstract

Graphitic carbon nitrides (g-C3N4) with unique physicochemical properties are promising candidates for photocatalysis applications. However, pristine g-C3N4 often suffers from narrow absorption ranges and high carrier recombination rates, which result in mediocre catalytic performance. In this work, we prepare novel sulfur-doped high nitrogen containing carbon nitrides, C3N5 (SCNs), with a combined thiadiazole, triazole, and triazine framework by facile self-assembly of 5-amino-1,3,4-thiadiazole-2-thiol (5-ATDT). Their structural, morphological, and optical properties, and photocatalytic activities are investigated in detail. From density functional theory calculations and spectroscopic characterization studies, we construct thermodynamically stable molecular structures of SCNs composed of one triazole and two triazine moieties with small ratios of thiadiazole on the edge, in which the sulfur atoms are ionically connected with carbon/nitrogen atoms and gradually detached on increasing the calcination temperatures. Remarkably, the resultant SCNs exhibit a significantly enhanced H2-generation rate of 486 μmol g−1 h−1, about 60% higher than the average value derived from typical g-C3N4 synthesised by conventional precursors thanks to the enlarged light absorption range and enhanced charge carrier transfer rate. Our work provides a unique approach for designing novel sulfur-doped carbon nitrides with unprecedented functionalities.

Graphical abstract: S-doped C3N5 derived from thiadiazole for efficient photocatalytic hydrogen evolution

Supplementary files

Article information

Article type
Paper
Submitted
18 Janv. 2023
Accepted
07 Febr. 2023
First published
07 Febr. 2023

J. Mater. Chem. A, 2023,11, 12837-12845

S-doped C3N5 derived from thiadiazole for efficient photocatalytic hydrogen evolution

X. Guan, M. Fawaz, R. Sarkar, C. Lin, Z. Li, Z. Lei, P. D. Nithinraj, P. Kumar, X. Zhang, J. Yang, L. Hu, T. Wu, S. Chakraborty, J. Yi and A. Vinu, J. Mater. Chem. A, 2023, 11, 12837 DOI: 10.1039/D3TA00318C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements