Enhanced NO2-sensing performances of CeO2 nanoparticles on MoS2 at room temperature

Lizhai Zhang; Chuangbei Ma; Jinniu Zhang; Yuhong Huang; Huiyan Xu; Hongbing Lu; Kewei Xu; Fei Ma

doi:10.1016/j.apsusc.2022.154157

Enhanced NO₂-sensing performances of CeO₂ nanoparticles on MoS₂ at room temperature

Lizhai Zhang
, Chuangbei Ma
, Jinniu Zhang
, Yuhong Huang
, Huiyan Xu
, Hongbing Lu
, Kewei Xu
, Fei Ma

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The composites of CeO₂ nanoparticles and MoS₂ nanosheets are prepared by hydrothermal method. It is found that the CeO₂/MoS₂ composites exhibit the better NO₂-sensing response at room temperature (RT), with the sensitivity towards 5 ppm NO₂ higher than that of pure MoS₂ by 69.1%, and 85% of the resistance can be returned within 900 s. The sensor also possesses the characteristics of a fast response, a reliable long-term stability and an excellent selectivity. Based on the first-principle calculations, the adsorption energy of CeO₂/MoS₂ composites to NO₂ is much higher than that of MoS₂, enhancing the adsorption ability of NO₂. Moreover, the CeO₂/MoS₂ composites could suppress the aggregation of nanosheets and nanoparticles, and thus provide plenty of active sites for adsorption of NO₂ molecules. As a result, the room-temperature NO₂-sensing response is enhanced substantially.

Original language	English
Article number	154157
Journal	Applied Surface Science
Volume	600
DOIs	https://doi.org/10.1016/j.apsusc.2022.154157
State	Published - 30 Oct 2022

Keywords

CeO/MoS composite
First-principle calculation
Gas sensors

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10.1016/j.apsusc.2022.154157

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title = "Enhanced NO2-sensing performances of CeO2 nanoparticles on MoS2 at room temperature",

abstract = "The composites of CeO2 nanoparticles and MoS2 nanosheets are prepared by hydrothermal method. It is found that the CeO2/MoS2 composites exhibit the better NO2-sensing response at room temperature (RT), with the sensitivity towards 5 ppm NO2 higher than that of pure MoS2 by 69.1\%, and 85\% of the resistance can be returned within 900 s. The sensor also possesses the characteristics of a fast response, a reliable long-term stability and an excellent selectivity. Based on the first-principle calculations, the adsorption energy of CeO2/MoS2 composites to NO2 is much higher than that of MoS2, enhancing the adsorption ability of NO2. Moreover, the CeO2/MoS2 composites could suppress the aggregation of nanosheets and nanoparticles, and thus provide plenty of active sites for adsorption of NO2 molecules. As a result, the room-temperature NO2-sensing response is enhanced substantially.",

keywords = "CeO/MoS composite, First-principle calculation, Gas sensors",

author = "Lizhai Zhang and Chuangbei Ma and Jinniu Zhang and Yuhong Huang and Huiyan Xu and Hongbing Lu and Kewei Xu and Fei Ma",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

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day = "30",

doi = "10.1016/j.apsusc.2022.154157",

language = "英语",

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journal = "Applied Surface Science",

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TY - JOUR

T1 - Enhanced NO2-sensing performances of CeO2 nanoparticles on MoS2 at room temperature

AU - Zhang, Lizhai

AU - Ma, Chuangbei

AU - Zhang, Jinniu

AU - Huang, Yuhong

AU - Xu, Huiyan

AU - Lu, Hongbing

AU - Xu, Kewei

AU - Ma, Fei

PY - 2022/10/30

Y1 - 2022/10/30

N2 - The composites of CeO2 nanoparticles and MoS2 nanosheets are prepared by hydrothermal method. It is found that the CeO2/MoS2 composites exhibit the better NO2-sensing response at room temperature (RT), with the sensitivity towards 5 ppm NO2 higher than that of pure MoS2 by 69.1%, and 85% of the resistance can be returned within 900 s. The sensor also possesses the characteristics of a fast response, a reliable long-term stability and an excellent selectivity. Based on the first-principle calculations, the adsorption energy of CeO2/MoS2 composites to NO2 is much higher than that of MoS2, enhancing the adsorption ability of NO2. Moreover, the CeO2/MoS2 composites could suppress the aggregation of nanosheets and nanoparticles, and thus provide plenty of active sites for adsorption of NO2 molecules. As a result, the room-temperature NO2-sensing response is enhanced substantially.

AB - The composites of CeO2 nanoparticles and MoS2 nanosheets are prepared by hydrothermal method. It is found that the CeO2/MoS2 composites exhibit the better NO2-sensing response at room temperature (RT), with the sensitivity towards 5 ppm NO2 higher than that of pure MoS2 by 69.1%, and 85% of the resistance can be returned within 900 s. The sensor also possesses the characteristics of a fast response, a reliable long-term stability and an excellent selectivity. Based on the first-principle calculations, the adsorption energy of CeO2/MoS2 composites to NO2 is much higher than that of MoS2, enhancing the adsorption ability of NO2. Moreover, the CeO2/MoS2 composites could suppress the aggregation of nanosheets and nanoparticles, and thus provide plenty of active sites for adsorption of NO2 molecules. As a result, the room-temperature NO2-sensing response is enhanced substantially.

KW - CeO/MoS composite

KW - First-principle calculation

KW - Gas sensors

UR - https://www.scopus.com/pages/publications/85133896335

U2 - 10.1016/j.apsusc.2022.154157

DO - 10.1016/j.apsusc.2022.154157

M3 - 文章

AN - SCOPUS:85133896335

SN - 0169-4332

VL - 600

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 154157

ER -

Enhanced NO₂-sensing performances of CeO₂ nanoparticles on MoS₂ at room temperature

Abstract

Keywords

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