Metal–Organic Framework (MOF)-Derived SnO2-ZnO Nanocomposites for Highly Sensitive NO2 Detection

IF 2.5 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-05-23 DOI:10.1007/s11664-024-11161-2

Shrihari Kannan, Gaurav Pandey, Shiv Dutta Lawaniya, Sanjay Kumar, Prashant Sharma, Kamlendra Awasthi

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Abstract

The presence of nitrogen dioxide (NO₂), a hazardous gas emanating from various sources including vehicles, industrial power plants, indoor combustion appliances, and tobacco smoke, underscores the importance of effective monitoring. Early risk assessment and continuous vigilance are vital to mitigate potential respiratory and cardiovascular consequences associated with prolonged exposure. To address this need, we have developed a cost-effective metal–organic framework (MOF)-derived SnO₂-ZnO-based gas sensor for NO₂ detection. Different combinations of SnO₂-ZnO were synthesized by varying the Sn/Zn molar ratio. The sensor SZ 1–0.5, having Sn/Zn = 1/0.5, demonstrated a superior response (R_g/R_a = 7.37) compared to bare SnO₂ and ZnO towards 100 ppm of NO₂ at 225°C. The fabricated SZ 1–0.5 sensor showed a good response time of 100 s with outstanding selectivity, cyclability, and repeatability. The enhanced gas-sensing characteristics of the sensor are attributed to the formation of heterojunctions. The gas-sensing mechanism is discussed in detail.

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用于高灵敏二氧化氮检测的金属有机框架 (MOF) 衍生 SnO2-ZnO 纳米复合材料

二氧化氮（NO2）是一种来自各种来源的有害气体，包括车辆、工业发电厂、室内燃烧器具和烟草烟雾，它的存在强调了有效监测的重要性。早期风险评估和持续警惕对于减轻与长期暴露相关的潜在呼吸和心血管后果至关重要。为了满足这一需求，我们开发了一种具有成本效益的金属有机框架（MOF）衍生的sno2 - zno基气体传感器，用于NO2检测。通过改变Sn/Zn的摩尔比，合成了不同的SnO2-ZnO组合。在225°C下，当NO2浓度为100 ppm时，Sn/Zn = 1/0.5的传感器sz1 - 0.5表现出比裸SnO2和ZnO更好的响应（Rg/Ra = 7.37）。制备的sz1 - 0.5传感器响应时间为100 s，具有良好的选择性、循环性和重复性。传感器的气敏特性增强是由于异质结的形成。详细讨论了气敏机理。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.