Issue 3, 2019

Benzothiadiazole functionalized D–A type covalent organic frameworks for effective photocatalytic reduction of aqueous chromium(vi)

Abstract

Covalent organic frameworks (COFs) have received increasing research interest as an emerging class of crystalline and porous polymers. Herein, we prepared two new benzothiadiazole (BT) functionalized COFs (i.e. TPB-BT-COF and TAPT-BT-COF), which exhibit good crystallinity, high porosity, and excellent stability in harsh conditions. Their applications for photoreduction of Cr(VI) species under visible light irradiation were investigated. Over 99% Cr(VI) was reduced by utilizing TPB-BT-COF as catalyst without any sacrificial agents or additional pH adjustment. The photocatalytic rate of TPB-BT-COF is faster than that of TAPT-BT-COF, which can be attributed to more negative conduction band and narrower bandgap. Our results indicate that co-condensation of electron deficient units into the COF skeleton is conducive to efficient separation of photoexcited electrons and holes, which in turn leads to superior photocatalytic activities.

Graphical abstract: Benzothiadiazole functionalized D–A type covalent organic frameworks for effective photocatalytic reduction of aqueous chromium(vi)

Supplementary files

Article information

Article type
Paper
Submitted
18 Oct 2018
Accepted
16 Nov 2018
First published
20 Nov 2018

J. Mater. Chem. A, 2019,7, 998-1004

Benzothiadiazole functionalized D–A type covalent organic frameworks for effective photocatalytic reduction of aqueous chromium(VI)

W. Chen, Z. Yang, Z. Xie, Y. Li, X. Yu, F. Lu and L. Chen, J. Mater. Chem. A, 2019, 7, 998 DOI: 10.1039/C8TA10046B

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