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Highly Sensitive Room Temperature H2S Gas Sensor Based on the Nanocomposite of MoS2–ZnCo2O4
ACS Omega ( IF 3.7 ) Pub Date : 2023-11-27 , DOI: 10.1021/acsomega.3c06876
Shama Sadaf 1 , Hongpeng Zhang 1 , Daru Chen 2 , Ali Akhtar 2
ACS Omega ( IF 3.7 ) Pub Date : 2023-11-27 , DOI: 10.1021/acsomega.3c06876
Shama Sadaf 1 , Hongpeng Zhang 1 , Daru Chen 2 , Ali Akhtar 2
Affiliation
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The stacking 2D materials, such as molybdenum disulfide (MoS2), are among the most promising candidates for detecting H2S gas. Herein, we designed a series of novel nanocomposites consisting of MoS2 and ZnCo2O4. These materials were synthesized via a simple hydrothermal method. The microstructure and morphology of nanocomposites were studied by different characteristics such as X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy, Brunauer–Emmett–Teller (BET), and X-ray photoelectron spectroscopy. These nanocomposites were used as gas sensors, and the highest response (6.6) toward 10 ppm of H2S was detected by the gas sensor of MZCO-6 (having MoS2 contents 0.060 g) among all other tested sensors. The response value (Ra/Rg) was almost three times that of pure ZnCo2O4 (Ra/Rg = 2). In addition, the sensor of MZCO-6 exposed good selectivity, short response/recovery time (12/28 s), long-term stability (28 days), and a low detection limit (0.5 ppm) toward H2S gas at RT. The excellent performance of MZCO-6 may be attributed to some features of MoS2, such as stack structure, higher BET and surface area and active sites, a synergistic effect, etc. This simple fabrication sensor provides a novel idea for detecting H2S gas at RT.
中文翻译：
基于MoS2-ZnCo2O4纳米复合材料的高灵敏度室温H2S气体传感器
二硫化钼 (MoS 2 ) 等堆叠二维材料是最有希望检测 H 2 S 气体的候选材料之一。在此，我们设计了一系列由MoS 2和ZnCo 2 O 4组成的新型纳米复合材料。这些材料是通过简单的水热法合成的。通过X射线衍射、扫描电子显微镜、能量色散X射线光谱、透射电子显微镜、高分辨率透射电子显微镜、Brunauer-Emmett-Teller (BET)等不同特征研究了纳米复合材料的微观结构和形貌。和X射线光电子能谱。这些纳米复合材料用作气体传感器，在所有其他测试的传感器中，MZCO-6(MoS 2含量0.060g)气体传感器检测到对10ppm H 2 S的最高响应(6.6)。响应值( R a / R g )几乎是纯ZnCo 2 O 4 ( R a / R g = 2)的三倍。此外，MZCO-6传感器在室温下对H 2 S气体具有良好的选择性、短响应/恢复时间(12/28 s)、长期稳定性(28天)和低检测限(0.5 ppm) 。 MZCO-6的优异性能可能归因于MoS 2的一些特性，例如堆叠结构、更高的BET和表面积和活性位点、协同效应等。这种简单制造的传感器为检测H 2 S提供了一种新颖的思路室温下的气体。
更新日期：2023-11-27
中文翻译：
基于MoS2-ZnCo2O4纳米复合材料的高灵敏度室温H2S气体传感器
二硫化钼 (MoS 2 ) 等堆叠二维材料是最有希望检测 H 2 S 气体的候选材料之一。在此，我们设计了一系列由MoS 2和ZnCo 2 O 4组成的新型纳米复合材料。这些材料是通过简单的水热法合成的。通过X射线衍射、扫描电子显微镜、能量色散X射线光谱、透射电子显微镜、高分辨率透射电子显微镜、Brunauer-Emmett-Teller (BET)等不同特征研究了纳米复合材料的微观结构和形貌。和X射线光电子能谱。这些纳米复合材料用作气体传感器，在所有其他测试的传感器中，MZCO-6(MoS 2含量0.060g)气体传感器检测到对10ppm H 2 S的最高响应(6.6)。响应值( R a / R g )几乎是纯ZnCo 2 O 4 ( R a / R g = 2)的三倍。此外，MZCO-6传感器在室温下对H 2 S气体具有良好的选择性、短响应/恢复时间(12/28 s)、长期稳定性(28天)和低检测限(0.5 ppm) 。 MZCO-6的优异性能可能归因于MoS 2的一些特性，例如堆叠结构、更高的BET和表面积和活性位点、协同效应等。这种简单制造的传感器为检测H 2 S提供了一种新颖的思路室温下的气体。
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