Issue 7, 2023

In situ construction of graphdiyne based heterojunctions by a deprotection-free approach for photocatalytic hydrogen generation

Abstract

Graphdiyne (GDY) with a direct bandgap, high charge carrier mobility, and ordered pore structure, is considered an excellent matrix for the construction of heterojunction photocatalysts. However, the traditional fabrication methods for GDY-based heterojunctions require a complicated deprotection of hexakis-[(trimethylsilyl)ethynyl]benzene (HEB-TMS) and usually result in localized heterojunctions. Herein, we developed a facile deprotection-free method to in situ grow GDY on the surface of C3N4 by directly using HEB-TMS as the precursor. Such a method enabled the formation of an integral GDY@C3N4 heterojunction, resulting in a significantly enhanced photocatalytic activity in the visible region. The optimized GDY@C3N4 showed 15.6-fold hydrogen production efficiency compared to pristine C3N4, and outperformed the GDY/C3N4 samples synthesized by other approaches (e.g. physical mixing, hydrothermal treatment and calcination treatment). This study provides a universal and efficient strategy for the design of GDY-based heterojunction photocatalysts for solar-to-hydrogen energy conversion.

Graphical abstract: In situ construction of graphdiyne based heterojunctions by a deprotection-free approach for photocatalytic hydrogen generation

Supplementary files

Article information

Article type
Paper
Submitted
21 12月 2022
Accepted
18 1月 2023
First published
18 1月 2023

J. Mater. Chem. A, 2023,11, 3380-3387

In situ construction of graphdiyne based heterojunctions by a deprotection-free approach for photocatalytic hydrogen generation

C. Wang, X. Han, Q. Xu, Y. Sun, J. Arbiol, M. N. Ghazzal and J. Li, J. Mater. Chem. A, 2023, 11, 3380 DOI: 10.1039/D2TA09918G

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