Enhanced sensing response of the three dimensional MoS2 microstructure for NO2 gas detection at room temperature

IF 1.9 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Hongdao Cheng, Sihuan Huang, Zengshan Xing, Lu Yang, Jianhui Yu, Yongchun Zhong
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引用次数: 0

Abstract

As a promising sensing material, Molybdenum disulfide (MoS2) nanosheets is being increasingly studied for Nitrogen dioxide (NO2) gas sensing. However, the MoS2 nanosheets is prone to the stacking effect that compromises the sensing performances. Here, the stacking effect is mitigated by engineering MoS2 nanosheets into a three dimensional (3D) network microstructure, which was fabricated by method of electrostatically self-assembling of MoS2/SiO2 microspheres. The fabricated sensor based on 3D MoS2 network observed a significantly improved response of 15% to 12.3 ppm NO2, which is a 75-fold increase compared to the control sensor with pure MoS2 nanosheets. In addition, the sensitivity of the sensor with 3D MoS2 network was 6.15 times larger than that of the control sensor with pure MoS2 nanosheets. The detection limit of our sensor was 0.297 ppm, lower than most of reported MoS2-based NO2 sensors. The enhanced sensitivity and dynamic response stem from the improved interaction between NO2 molecules and MoS2 network, thanks to its increased surface area per footprint of MoS2 nanosheets compared to pure 2D MoS2 film (single- or few-layer). This work presents a new approach to enhancing the performance of gas sensors based on 2D materials.
增强三维 MoS2 微结构的传感响应,用于室温下的二氧化氮气体检测
二硫化钼(MoS2)纳米片是一种前景广阔的传感材料,用于二氧化氮(NO2)气体传感的研究越来越多。然而,MoS2 纳米片容易产生堆叠效应,从而影响传感性能。在这里,通过静电自组装 MoS2/SiO2 微球的方法,将 MoS2 纳米片设计成三维(3D)网络微结构,从而减轻了堆叠效应。与使用纯 MoS2 纳米片的对照传感器相比,基于三维 MoS2 网络制造的传感器对 12.3 ppm 二氧化氮的响应明显提高了 15%,提高了 75 倍。此外,三维 MoS2 网络传感器的灵敏度是纯 MoS2 纳米片对照传感器的 6.15 倍。我们的传感器的检测限为 0.297 ppm,低于大多数已报道的基于 MoS2 的二氧化氮传感器。与纯二维 MoS2 薄膜(单层或少层)相比,MoS2 纳米片的单位面积表面积增大,从而改善了 NO2 分子与 MoS2 网络之间的相互作用,从而提高了灵敏度和动态响应。这项工作为提高基于二维材料的气体传感器的性能提供了一种新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Frontiers in Physics
Frontiers in Physics Mathematics-Mathematical Physics
CiteScore
4.50
自引率
6.50%
发文量
1215
审稿时长
12 weeks
期刊介绍: Frontiers in Physics publishes rigorously peer-reviewed research across the entire field, from experimental, to computational and theoretical physics. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, engineers and the public worldwide.
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