Edge-exposed MoS2 nanospheres assembled with SnS2 nanosheet to boost NO2 gas sensing at room temperature

被引：134

作者：

Liu, Lujia ^{[1
]}

Ikram, Muhammad ^{[1
]}

Ma, Laifeng ^{[1
]}

Zhang, Xueyi ^{[2
]}

Lv, He ^{[1
]}

Ullah, Mohib ^{[1
]}

Khan, Mawaz ^{[1
]}

Yu, Haitao ^{[1
]}

Shi, Keying ^{[1
]}

机构：

[1] Heilongjiang Univ, Sch Chem & Mat Sci, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China

[2] Northeast Agr Univ, Coll Food Sci, Harbin 150030, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2020年 / 393卷

基金：

中国国家自然科学基金;

关键词：

3D flower-like SnS2; p-n heterojunction; Edge exposed MoS2; Synergistic effect; Excellent response; 2-DIMENSIONAL SNS2; LITHIUM-ION; GRAPHENE; NANOPARTICLES; HETEROJUNCTION; PERFORMANCE; TRANSITION; STORAGE; HYBRID; FABRICATION;

D O I：

10.1016/j.jhazmat.2020.122325

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

SnS2 nanosheets (NSs) have become an ideal candidate for high performance gas sensors due to their unique sensing properties. However, the restocking and aggregation in the process of sensor manufacturing have great influence on the gas sensing performance. In this study, we synthesized a novel heterojunction of the flower-like porous SnS2 NSs with edge exposed MoS2 nanospheres via a facile hydrothermal method and sensitive response has achieved at room temperature (27 degrees C). After functionalization, the SMS-II showed excellent response (Ra/Rg = 25.9-100 ppm NO2), which is 22.3 times higher than that of the pristine SnS2 NSs. The sensor also has the characteristics of short response time of 2 s, excellent base line recovery (28.2 s), long-term stability and reliability within 16 weeks, good selectivity and low detection concentration of only 50 ppb. The p-n heterojunction formed between the edge-exposed spherical MoS2 and the 3D flower-like SnS2 NSs has a synergistic effect, providing a highly active sites for the adsorption of NO2 gas, which greatly enhance the sensitivity of the sensor. Simple fabrication and excellent gas sensing performance of the SnS2/MoS2 heterostructure nanomaterials (NMs) will highly effective for commercial gas sensing application.

引用

页数：10

共 73 条

[1] Photoactivated Mixed In-Plane and Edge-Enriched p-Type MoS2 Flake-Based NO2 Sensor Working at Room Temperature [J].