N-doped three-dimensional needle-like CoS2 bridge connection Co3O4 core–shell structure as high-efficiency room temperature NO2 gas sensor

被引：51

作者：

Bai X. ^{[1
]}

Liu Z. ^{[1
]}

Lv H. ^{[1
]}

Chen J. ^{[1
]}

Khan M. ^{[1
]}

Wang J. ^{[1
,2
]}

Sun B. ^{[1
]}

Zhang Y. ^{[1
]}

Kan K. ^{[2
]}

Shi K. ^{[1
]}

机构：

[1] Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education. School of Chemistry and Material Science, Heilongjiang University, Harbin

[2] Heilongjiang Academy of Sciences, Institute of Advanced Technology, Harbin

来源：

Journal of Hazardous Materials | 2022年 / 423卷

基金：

中国国家自然科学基金;

关键词：

Bridge connection core–shell structure; High sensitivity; N-doped; P-p heterojunction; Room-temperature NO[!sub]2[!/sub] sensors;

D O I：

10.1016/j.jhazmat.2021.127120

中图分类号：

学科分类号：

摘要：

The N-doped three-dimensional (3D) needle bridge connection core-shell structure N-CoS2@Co3O4 synthesized in this work was prepared by simple hydrothermal and high-temperature vulcanization methods. The optimized N-CoS2@Co3O4-2 composite response to NO2 is 62.3–100 ppm, a response time of 1.3 s, the recovery time of 17.98 s, the detection limit of 5 ppb and stability of as long as 10 weeks at room temperature (RT). Its excellent NO2 sensing performance is attributed to the unique porous and bridge connection core-shell structure of the N-CoS2@Co3O4-2 with high specific surface area, interconnected internal channels, abundant exposed S edge active sites, and high catalytic performance promoted by N-doping. This simple manufacturing method of high-performance sensing materials paves the way for the design of N-doped bridge connection core–shell structures. © 2021 Elsevier B.V.

引用

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