Issue 7, 2021

Fabrication of 2D/2D COF/SnNb2O6 nanosheets and their enhanced solar hydrogen production

Abstract

Accelerating light-induced carrier transfer and improving charge utilization are essential for enhancing the efficiency of solar hydrogen production. In this work, for the first time, 2D/2D covalent organic-framework (COF)/SnNb2O6 nanosheets were fabricated by a hydrothermal process. By adjusting the content of TpPa-2-COF, it was used to optimize the performance of solar hydrogen production. The optimal TpPa-2-COF/SnNb2O6 nanosheets show a hydrogen production rate of 7.66 μmol·h−1, which is 5.8-fold and 3.5-fold that of pristine SnNb2O6 and TpPa-2-COF, respectively. The significant improvement in the photocatalytic performance can be attributed to the formation of a 2D/2D heterojunction nanosheet with a good energy band position between TpPa-2-COF and SnNb2O6, which can efficaciously inhibit the restructuring of charge carriers. Through photoelectrochemical analysis, it is further proved that the interface interaction between TpPa-2-COF and SnNb2O6 can lead to effective charge separation. Moreover, the cycling experiments reveal that the as-prepared photocatalyst has excellent stability and recycling performance. This study shows that the smart integration of organic (COF) and inorganic materials into a heterojunction with a 2D/2D structure is an available tactic for the fabrication of efficient photocatalysts.

Graphical abstract: Fabrication of 2D/2D COF/SnNb2O6 nanosheets and their enhanced solar hydrogen production

Supplementary files

Article information

Article type
Research Article
Submitted
07 dez 2020
Accepted
28 jan 2021
First published
02 fev 2021

Inorg. Chem. Front., 2021,8, 1686-1694

Fabrication of 2D/2D COF/SnNb2O6 nanosheets and their enhanced solar hydrogen production

J. Ren, Z. Xia, B. Luo, D. Li and W. Shi, Inorg. Chem. Front., 2021, 8, 1686 DOI: 10.1039/D0QI01443E

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