Light-assisted room temperature gas sensing performance and mechanism of direct Z-scheme MoS2/SnO2 crystal faceted heterojunctions

doi:10.1016/j.jhazmat.2022.129246

	Light-assisted room temperature gas sensing performance and mechanism of direct Z-scheme MoS2/SnO2 crystal faceted heterojunctions
	Yang, Yong 3,7; Gong, Wufei 3; Li, Xin 3; Liu, Yuan 3; Liang, Yan 5; Chen, Bin 2,4,6; Yang, Yanxing 1; Luo, Xingfang 3; Xu, Keng 3; Yuan, Cailei 3
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2022-08-15
卷号	436
关键词	Light assistance NO2 Gas sensing Z-scheme MoS2
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2022.129246
通讯作者	Yang, Yong(yyang@jxnu.edu.cn)
英文摘要	Light assistance and construction of heterojunctions are both promising means to improve the room temperature gas sensing performance of MoS2 recently. However, enhancing the separation efficiency of photo-generated carriers at interface and adsorption ability of surface have become the bottleneck problem to further improve the room temperature gas sensing performance of MoS2-based heterojunctions under light assistance. In the present study, a novel direct Z-scheme MoS2/SnO2 heterojunction was designed through crystal facets engineering and its room temperature gas sensing properties under light assistance was studied. It was found that the heterojunction showed outstanding room temperature NO2 sensing performance with a high response of 208.66 toward 10 ppm NO2, together with excellent recovery characteristics and selectivity. The gas sensing mechanism study suggested that high-energy {221} crystal facets of SnO2 and MoS2 directly formed Z-scheme heterojunction, which could greatly improve the separation efficiency of photo-generated carriers with high redox capacity. Moreover, {221} facets greatly enhanced adsorption ability towards NO2. This work not only opens up the application of Z-scheme heterojunctions in gas sensing, which will greatly promotes the development of room temperature light-assisted gas sensors, but also provides a new idea for the construction of direct Z-scheme heterojunctions through crystal facets engineering.
资助项目	Natural Science Foundation of China[51962009] ; Natural Science Foundation of China[61664005] ; Natural Science Foundation of China[51871115] ; Project of Academic and Technological Leaders in Jiangxi Province[20204BCJ23004] ; Project of Academic and Technological Leaders in Jiangxi Province[20213BCJ22010] ; Project of Academic and Technological Leaders in Jiangxi Province[20212BCJ23018] ; Natural Science Foundation of Jiangxi Province of China[20192BAB206011] ; Natural Science Foundation of Jiangxi Province of China[20202BABL202021] ; Natural Science Foundation of Jiangxi Province of China[20202BAB212008] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP013] ; Hefei National Laboratory for Physical Sciences at the Microscale[KF2020109]
WOS关键词	PHOTOCATALYTIC DEGRADATION ; MOS2 NANOSHEETS ; NO2 SENSOR ; LAYER MOS2 ; NANOPARTICLES ; CONSTRUCTION ; MODULATION ; DIOXIDE
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000810939700001
资助机构	Natural Science Foundation of China ; Project of Academic and Technological Leaders in Jiangxi Province ; Natural Science Foundation of Jiangxi Province of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Hefei National Laboratory for Physical Sciences at the Microscale
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129580]
专题	中国科学院合肥物质科学研究院
通讯作者	Yang, Yong
作者单位	1.New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA 2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China 3.Jiangxi Normal Univ, Sch Phys, Jiangxi Key Lab Nanomat & Sensors, Jiangxi Key Lab Photoelect & Telecommun, Nanchang 330098, Jiangxi, Peoples R China 4.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 5.Jiangxi Univ Technol, Dept Artificial Intelligence, Nanchang 330022, Jiangxi, Peoples R China 6.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, HFIPS, Hefei 230031, Peoples R China 7.Jiangxi Normal Univ, Sch Phys, Key Lab Nanomat & Sensors, Jiangxi Key Lab Photoelect & Telecommun, Nanchang 330022, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yong,Gong, Wufei,Li, Xin,et al. Light-assisted room temperature gas sensing performance and mechanism of direct Z-scheme MoS2/SnO2 crystal faceted heterojunctions[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,436.
APA	Yang, Yong.,Gong, Wufei.,Li, Xin.,Liu, Yuan.,Liang, Yan.,...&Yuan, Cailei.(2022).Light-assisted room temperature gas sensing performance and mechanism of direct Z-scheme MoS2/SnO2 crystal faceted heterojunctions.JOURNAL OF HAZARDOUS MATERIALS,436.
MLA	Yang, Yong,et al."Light-assisted room temperature gas sensing performance and mechanism of direct Z-scheme MoS2/SnO2 crystal faceted heterojunctions".JOURNAL OF HAZARDOUS MATERIALS 436(2022).