Highly Selective Hybrid InSe-Graphene for NO₂ Gas Sensing with High Humidity Tolerance.

IF 9.1 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2025-07-25 Epub Date: 2025-06-30 DOI:10.1021/acssensors.4c03521

Jyayasi Sharma, Frank Güell, Mubdiul Islam Rizu, Dalal Fadil, Eduard Llobet

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Abstract

p-type pristine InSe, pristine graphene, and the corresponding hybrid InSe-graphene gas sensor that is highly selective to NO₂ have been developed. These materials are produced at an environmentally friendly temperature of 35 °C by the Liquid Phase Exfoliation (LPE) technique. Then their deposition was performed on alumina transducers for achieving chemoresistive gas sensors. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), and Raman spectroscopy were used to analyze the materials. The multilayered crystalline structure is revealed by HRTEM. Studies on gas-sensing properties showed that the response of the hybrid InSe-graphene sensor to 1 ppm of NO₂ is three times higher than the one of the pristine graphene sensor, whereas the pristine InSe sensor was not responsive. While under dry conditions, the response to NO₂ (1 ppb) was 3.41%, under humid conditions (RH 50%), the responsiveness was significantly increased to 6.16% and to 14.42% for sensors operated at 150 and 250 °C, respectively.

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高选择性混合铟-石墨烯NO2气体传感与高湿度耐受性。

开发了p型原始InSe、原始石墨烯以及相应的对NO2具有高选择性的混合InSe-石墨烯气体传感器。这些材料是通过液相剥离（LPE）技术在35°C的环保温度下生产的。然后将其沉积在氧化铝传感器上，以实现化学电阻式气体传感器。采用x射线衍射（XRD）、场发射扫描电镜（FESEM）、高分辨率透射电镜（HRTEM）、光致发光（PL）和拉曼光谱对材料进行了分析。HRTEM分析了其多层晶体结构。气敏性能研究表明，当NO2浓度为1ppm时，混合铟硒-石墨烯传感器的响应是原始石墨烯传感器的3倍，而原始铟硒传感器则没有响应。在干燥条件下，传感器对NO2 （1 ppb）的响应率为3.41%，在潮湿条件下（RH 50%），传感器在150°C和250°C下的响应率分别显著提高到6.16%和14.42%。

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来源期刊

ACS Sensors Chemical Engineering-Bioengineering

CiteScore

14.50

自引率

3.40%

发文量

372

期刊介绍： ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.