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用于室温下硫化氢传感的二硫化钼-氧化镍纳米复合材料

MoS-NiO nanocomposite for HS sensing at room temperature.

作者信息

Sadaf Shama, Zhang Hongpeng, Akhtar Ali

机构信息

Marine Engineering College, Dalian Maritime University Dalian 116026 China

School of Information Science and Technology, Dalian Maritime University Dalian 116026 Liaoning P. R. China.

出版信息

RSC Adv. 2023 Sep 29;13(41):28564-28575. doi: 10.1039/d3ra05241a. eCollection 2023 Sep 26.

DOI:10.1039/d3ra05241a
PMID:37780733
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10539850/
Abstract

The layered 2-D materials, such as molybdenum disulfide (MoS), are among the most promising candidates for detecting HS gas at very low concentrations. Herein, we have designed a series of novel nanocomposites consisting of MoS and NiO. These materials were synthesized a simple hydrothermal method. The microstructure and morphology of nanocomposites were studied using different characterization techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET) analysis, and X-ray photoelectron spectroscopy (XPS). These nanocomposites were used as gas sensors, and the highest response (6.3) towards 10 ppm HS was detected by the MNO-10 gas sensor among all the tested sensors. The response value (/) was almost three times that of pure NiO (/ = 2). Besides, the MNO-10 sensor exposed good selectivity, short response/recovery time (50/20 s), long-term stability (28 days), reproducibility (6 cycles), and a low detection limit (2 ppm) towards HS gas at RT. The excellent performance of MNO-10 may be attributed to some features of MoS, such as a layered structure, higher BET surface area, higher active sites, and a synergistic effect between MoS and NiO. This simple fabrication sensor throws a novel idea for detecting HS gas.

摘要

诸如二硫化钼（MoS）之类的层状二维材料是检测极低浓度硫化氢（HS）气体最有前景的候选材料之一。在此，我们设计了一系列由MoS和NiO组成的新型纳米复合材料。这些材料通过简单的水热法合成。使用不同的表征技术研究了纳米复合材料的微观结构和形态，如X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）、布鲁诺尔-埃米特-泰勒（BET）分析和X射线光电子能谱（XPS）。这些纳米复合材料用作气体传感器，在所有测试传感器中，MNO-10气体传感器对10 ppm HS的响应最高（6.3）。响应值（/）几乎是纯NiO（/ = 2）的三倍。此外，MNO-10传感器在室温下对HS气体表现出良好的选择性、短响应/恢复时间（50/20 s）、长期稳定性（28天）、重现性（6个循环）和低检测限（2 ppm）。MNO-10的优异性能可能归因于MoS的一些特性，如层状结构、更高的BET表面积、更多的活性位点以及MoS和NiO之间的协同效应。这种简单制造的传感器为检测HS气体提供了新思路。

需注意，原文中“molybdenum disulfide (MoS)”可能有误，推测应为“molybdenum disulfide (MoS₂)” ；“HS gas”推测应为“H₂S gas” 。以上译文基于给定原文进行翻译。

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