التفاصيل البيبلوغرافية
| العنوان: |
Enhanced NO2-sensing performances of CeO2 nanoparticles on MoS2 at room temperature. |
| المؤلفون: |
Zhang, Lizhai1,2 (AUTHOR), Ma, Chuangbei1 (AUTHOR), Zhang, Jinniu3 (AUTHOR), Huang, Yuhong3 (AUTHOR), Xu, Huiyan4 (AUTHOR), Lu, Hongbing3 (AUTHOR), Xu, Kewei1,5 (AUTHOR) kwxu@mail.xjtu.edu.cn, Ma, Fei1 (AUTHOR) mafei@mail.xjtu.edu.cn |
| المصدر: |
Applied Surface Science. Oct2022, Vol. 600, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*CERIUM oxides, *NANOPARTICLES, *TEMPERATURE, *NANOSTRUCTURED materials, *GAS detectors |
| مستخلص: |
The gas-sensing performance of MoS 2 can be effectively enhanced when combined with CeO 2 nanoparticles. [Display omitted] • The flower CeO 2 /MoS 2 nanocomposite was prepared by the simple hydrothermal method. • The NO 2 -sensing response of MoS 2 at room temperature could be effectively enhanced by combined with CeO 2 nanoparticles. • The enhanced NO 2 sensing properties of the CeO 2 /MoS 2 nanocomposite were systematically discussed. The composites of CeO 2 nanoparticles and MoS 2 nanosheets are prepared by hydrothermal method. It is found that the CeO 2 /MoS 2 composites exhibit the better NO 2 -sensing response at room temperature (RT), with the sensitivity towards 5 ppm NO 2 higher than that of pure MoS 2 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 CeO 2 /MoS 2 composites to NO 2 is much higher than that of MoS 2 , enhancing the adsorption ability of NO 2. Moreover, the CeO 2 /MoS 2 composites could suppress the aggregation of nanosheets and nanoparticles, and thus provide plenty of active sites for adsorption of NO 2 molecules. As a result, the room-temperature NO 2 -sensing response is enhanced substantially. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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