Issue 22, 2022

A novel Sn2Nb2O7/defective carbon nitride heterojunction photocatalyst: preparation and application for photocatalytic oxytetracycline removal

Abstract

A traditional type-II Sn2Nb2O7/defective carbon nitride (HCN) heterojunction structure photocatalyst was constructed to enhance the photocatalytic property of the pyrochlore Sn2Nb2O7. Experimental analysis verified that a built-in electric field was formed between Sn2Nb2O7 and HCN, resulting in the photogenerated electrons and holes gathering on the conduction band of HCN and valence band of Sn2Nb2O7, respectively. The formation of Sn2Nb2O7/HCN improved the separation efficiency and transfer rate of photogenerated charge carriers. The optimal photocatalytic oxytetracycline (OTC) removal efficiency of Sn2Nb2O7/HCN was 58.4% after 150 min of visible light irradiation, which was 1.41 and 1.92 times higher than those of Sn2Nb2O7 (41.5%) and HCN (30.4%), respectively. The trapping active species and electron paramagnetic resonance results proved that the dominant active species in the photodegradation of OTC were photogenerated holes, hydroxyl radicals and superoxide anions. This work might provide a new strategy for improving the photocatalytic performance of Sn2Nb2O7 by building traditional type-II heterojunction photocatalysts.

Graphical abstract: A novel Sn2Nb2O7/defective carbon nitride heterojunction photocatalyst: preparation and application for photocatalytic oxytetracycline removal

Supplementary files

Article information

Article type
Paper
Submitted
28 Mar 2022
Accepted
21 Apr 2022
First published
22 Apr 2022

CrystEngComm, 2022,24, 4128-4133

A novel Sn2Nb2O7/defective carbon nitride heterojunction photocatalyst: preparation and application for photocatalytic oxytetracycline removal

H. Zhang, L. Peng, H. Li, Y. Su and S. Huang, CrystEngComm, 2022, 24, 4128 DOI: 10.1039/D2CE00427E

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