Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 423, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.127120
Keywords
N-doped; P-p heterojunction; High sensitivity; Bridge connection core-shell structure; Room-temperature NO2 sensors
Categories
Funding
- National Natural Science Foundation of China [2167010747, 21671060]
- Applied Technology Research and Development Program Foreign Cooperation Project of Heilongjiang Province [135309441]
- Natural Science Foundation of Heilongjiang Province [LH2019B030]
- Scientific Research Funds of University affiliated to Heilongjiang Province [KJCX201913]
- Funds of Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education
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The N-doped three-dimensional needle bridge connection core-shell structure N-CoS2@Co3O4 synthesized in this work exhibits excellent NO2 sensing performance, attributed to its unique structural features and high catalytic performance promoted by N-doping.
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 NCoS2@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 highperformance sensing materials paves the way for the design of N-doped bridge connection core-shell structures.
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