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MoS2-GO hybrid sensor: A discerning approach for detecting harmful H2S gas at room temperature
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2023-07-16 , DOI: 10.1016/j.cej.2023.144789
Gajanan M. Hingangavkar , Sujit A. Kadam , Yuan-Ron Ma , Sushilkumar S. Bandgar , Ramesh N. Mulik , Vikas B. Patil

The molybdenum disulfide (MoS2)- graphene oxide (GO) hybrids have fashioned by a clean hydrothermal route. Initially, two-dimensional GO sheets have synthesized using the modified Hummer’s method and intercalated into the MoS2 nanoparticles (NPs). The sophisticated characterizations comprising X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analyzer, custom designed gas sensing set-up, etc. utilized for the analysis of as-prepared MoS2-GO (1 to 5 wt%) hybrids. The maximum sensor response exhibited by as-prepared MoS2-GO (3%) hybrid sensor was 39.16% towards 100 ppm hydrogen sulfide (H2S) gas at room temperature (RT, i.e., 28 °C) in a quickest response time (6.13 s) and least concentration of H2S detected was 1 ppm with response value 0.51%. This report investigated first time that as-prepared MoS2-GO (MG) hybrids with varied proportion of GO (1 to 5 wt%) demonstrated spectacularly improved gas sensing performance towards H2S at RT. The boosted gas sensing performance of MG hybrids could be attributed to the synergistic influence of constituents i.e., MoS2 NPs and GO sheets. An impedance spectroscopy has been exploited to study the interactions between H2S gas molecules and MG hybrid sensor surface.



中文翻译:

MoS2-GO 混合传感器:一种在室温下检测有害 H2S 气体的独特方法

二硫化钼(MoS 2)-氧化石墨烯(GO)杂化物是通过清洁水热路线形成的。最初,使用改进的 Hummer 方法合成了二维 GO 片,并将其嵌入到 MoS 2纳米颗粒 (NP) 中。复杂的表征包括 X 射线衍射 (XRD)、拉曼光谱、场发射扫描电子显微镜 (FESEM)、能量色散光谱 (EDS)、透射电子显微镜 (TEM)、X 射线光电子能谱 (XPS)、Brunauer-Emmett-Teller (BET) 分析仪、定制设计的气体传感装置等,用于分析所制备的 MoS 2 -GO(1 至 5 wt%)杂化。所制备的 MoS 2表现出的最大传感器响应-GO (3%) 混合传感器在室温 (RT,即 28 °C) 下对100 ppm 硫化氢 (H 2 S) 气体的检测率为 39.16%,响应时间最快 (6.13 s),检测到的 H 2 S 最低浓度为 1 ppm,响应值为 0.51%。该报告首次研究了所制备的具有不同比例 GO(1 至 5 wt%)的 MoS 2 -GO (MG) 杂化物,显示出在室温下对 H 2 S 的气体传感性能显着改善。MG 混合体的气体传感性能的提高可归因于成分(即 MoS 2 NP 和 GO 片)的协同影响。阻抗谱已被用来研究 H 2之间的相互作用S气体分子和MG混合传感器表面。

更新日期:2023-07-16
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