Issue 35, 2021

Design of hierarchical SnSe2 for efficient detection of trace NO2 at room temperature

Abstract

Layered tin diselenide (SnSe2) has aroused widespread scientific interest by virtue of its exceptional chemical, physical, and electrical characteristics. The distinctive features of SnSe2 enable it to be an ideal candidate for efficient detection of NO2 at room temperature. Herein, hierarchical SnSe2 assembled from thin nanosheets was designed and prepared through a facile solvothermal method. An ultralow detection limit (10 ppb) and considerable NO2 sensing performance were obtained at room temperature. A sensor based on hierarchical SnSe2 demonstrated a high response value of 1200% (triple that of SnSe2 nanosheets) and short response/recovery time of 50/55 s toward 10 ppm NO2. These remarkable sensing properties are uncommon in two-dimensional (2D) materials at room temperature. Additionally, the sensor exhibited superb selectivity, reliable reproducibility, and excellent long-term stability within 5 months. These enhanced sensing properties could be ascribed to the unique hierarchical structures, which possess large accessible space that enhances the adsorption and diffusion of gas molecules. This study offers a new strategy to improve the sensing performance of SnSe2 through rational morphology and structure design.

Graphical abstract: Design of hierarchical SnSe2 for efficient detection of trace NO2 at room temperature

Supplementary files

Article information

Article type
Paper
Submitted
18 jun 2021
Accepted
20 jul 2021
First published
21 jul 2021

CrystEngComm, 2021,23, 6045-6052

Design of hierarchical SnSe2 for efficient detection of trace NO2 at room temperature

T. Wang, Y. Wang, S. Zheng, Q. Sun, R. Wu and J. Hao, CrystEngComm, 2021, 23, 6045 DOI: 10.1039/D1CE00804H

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