Issue 9, 2020

Enhancement of the photocatalytic synchronous removal of Cr(vi) and RhB over RP-modified flower-like SnS2

Abstract

Although photocatalysis is frequently employed to remove various pollutants in water, it still suffers from low efficiency due to the rapid recombination of photogenerated electrons and holes. In this study, a red phosphorus/tin disulfide (RP/SnS2) composite photocatalyst is fabricated by loading nano-sized RP on flower-like SnS2 films with a facile hydrothermal method. It is noteworthy that the 2D heterojunction formed between SnS2 and RP provided channels for the rapid transfer of photon-generated carriers and their effective separation. Furthermore, the separated electrons can react with absorbed O2 for the generation of superoxide radicals (˙O2), thereby impacting the photocatalytic degradation oxidation reaction. The application of photocatalytic synchronous removal of Cr(VI) and RhB over RP/SnS2 was implemented first. Compared with pristine SnS2, the photocatalytic degradation activity of Cr(VI) and RhB over the RP/SnS2 composite was significantly enhanced and the kinetic rate constant reached 8.2, which is 10.8 times that of pristine SnS2. Moreover, the hybrid photocatalysts exhibited prominent reusability and stability. Therefore, a photocatalytic degradation mechanism and pathway of carriers are proposed in the study. Furthermore, it is considered that the present study is a promising method in the treatment of wastewater by photocatalysis.

Graphical abstract: Enhancement of the photocatalytic synchronous removal of Cr(vi) and RhB over RP-modified flower-like SnS2

Supplementary files

Article information

Article type
Paper
Submitted
15 iyn 2020
Accepted
28 iyl 2020
First published
28 iyl 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2020,2, 4220-4228

Enhancement of the photocatalytic synchronous removal of Cr(VI) and RhB over RP-modified flower-like SnS2

X. Bai, Y. Du, W. Xue, X. Hu, J. Fan, J. Li and E. Liu, Nanoscale Adv., 2020, 2, 4220 DOI: 10.1039/D0NA00489H

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, 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 commercial 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