MXene/WS2 hybrids for visible-light-activated NO2 sensing at room temperature

Yi Xia; Sufang He; Junming Wang; Liexing Zhou; Jing Wang; Sridhar Komarneni

doi:10.1039/d1cc03474j

MXene/WS₂ hybrids for visible-light-activated NO₂ sensing at room temperature

Chem Commun (Camb). 2021 Sep 9;57(72):9136-9139. doi: 10.1039/d1cc03474j.

Authors

Yi Xia^{1

2}, Sufang He¹, Junming Wang¹, Liexing Zhou¹, Jing Wang³, Sridhar Komarneni⁴

Affiliations

¹ Research Center for Analysis and Measurement, Kunming University of Science and Technology, and Analytic & Testing Research Center of Yunnan, Kunming 650093, China.
² The Key Laboratory of Unconventional Metallurgy, Ministry of Education, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
³ School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
⁴ Department of Ecosystem Science and Management and Materials Research Institute, 204 Energy and the Environment Laboratory, The Pennsylvania State University, University Park, PA 16802, USA. sxk7@psu.edu.

PMID: 34498643
DOI: 10.1039/d1cc03474j

Abstract

Optoelectronic gas sensors based on two-dimensional (2D) materials are touted as potential candidates for NO₂ sensing at room temperature. However, most of the developed optoelectronic sensors to date are confined to the ultraviolet region with unsatisfactory performance. Herein, a room-temperature visible-light-activated optoelectronic NO₂ sensor based on 2D/2D T₃C₂T_x/WS₂ nanocomposites is presented. The T₃C₂T_x/WS₂-based gas sensor exhibited fast response/recovery rate, full reversibility, long stability, good selectivity, and low detection limit (10 ppb). In addition to the efficient interfacial charge separation provided by 2D/2D heterostructures, the improvement of optoelectronic NO₂ sensing performance was attributed to the visible-light-activation effects. This study provides a promising method to fabricate room-temperature high-performance gas sensors based on 2D nanomaterials.