材料科学
硒化物
纳米颗粒
钼
选择性
纳米材料
吸附
化学工程
金属
纳米技术
二硫化钼
热液循环
微观结构
催化作用
复合材料
有机化学
冶金
硒
化学
工程类
作者
Shuai Liu,Yinggang Liu,Hanxiao Li,Yu Bai,Jiale Xue,Ruojun Xu,Min Zhang,Guoxiang Chen
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2022-02-28
卷期号:33 (21): 215501-215501
被引量:2
标识
DOI:10.1088/1361-6528/ac5446
摘要
In this paper, nanostructured molybdenum selenide (MoSe2) with composited phases are synthesized by hydrothermal method, and the products are modified by metal anoparticles to improve the gas sensing performance. Microstructure characterization shows that few layered 1T/2H-MoSe2nanosheets have been successfully prepared. Both the morphology and component of nanosheets could be tuned by the reaction parameters. It is shown the MoSe2-based nanomaterials have excellent selectivity to nitrogen dioxide (NO2) according to gas sensing properties measurement. The sensitivity of 1T/2H-MoSe2nanosheets modified by Cu nanoparticles is 17.73 (50 ppm NO2) at the optimal operating temperature, which is the highest compared with other samples. The sensors also exhibit rapid response/recovery time and high stability. The sensing mechanism of MoSe2nanosheets toward NO2is investigated based on the first-principles calculation. The results suggest the modification by metal nanoparticles could significantly improve the adsorption energy and charge transfer between gas molecule and MoSe2. This work demonstrates a promising guidance for the design of new NO2gas sensing materials and devices.
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