Low ppm NO2 detection through advanced ultrasensitive copper oxide gas sensor.

0 MATERIALS SCIENCE, MULTIDISCIPLINARY Discover nano Pub Date : 2024-06-24 DOI:10.1186/s11671-024-04039-z
Smriti Sihag, Rita Dahiya, Suman Rani, Priyanka Berwal, Anushree Jatrana, Avnish Kumar Sisodiya, Ashutosh Sharma, Vinay Kumar
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Abstract

The imperative development of a cutting-edge environmental gas sensor is essential to proficiently monitor and detect hazardous gases, ensuring comprehensive safety and awareness. Nanostructures developed from metal oxides are emerging as promising candidates for achieving superior performance in gas sensors. NO2 is one of the toxic gases that affects people as well as the environment so its detection is crucial. The present study investigates the gas sensing capability of copper oxide-based sensor for 5 ppm of NO2 gas at 100 °C. The sensing material was synthesized using a facile precipitation method and characterized by XRD, FE-SEM, UV-visible spectroscopy, photoluminescence spectroscopy, XPS and BET techniques. The developed material shows a response equal to 67.1% at optimal temperature towards 5 ppm NO2 gas. The sensor demonstrated an impressive detection limit of 300 ppb, along with a commendable percentage response of 5.2%. Under optimized conditions, the synthesized material demonstrated its high selectivity, as evidenced by the highest percentage response recorded for NO2 gas among NO2, NH3, CO, CO2 and H2S.

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通过先进的超灵敏氧化铜气体传感器检测低ppm二氧化氮。
要想熟练地监测和检测有害气体,确保全面的安全和意识,就必须开发尖端的环境气体传感器。利用金属氧化物开发的纳米结构正在成为气体传感器实现卓越性能的理想候选材料。二氧化氮是影响人类和环境的有毒气体之一,因此对它的检测至关重要。本研究探讨了基于氧化铜的传感器在 100 °C 下对 5 ppm 二氧化氮气体的传感能力。该传感材料采用简便的沉淀法合成,并通过 XRD、FE-SEM、紫外可见光谱、光致发光光谱、XPS 和 BET 技术进行表征。所开发的材料在最佳温度下对 5 ppm 二氧化氮气体的响应为 67.1%。该传感器的检测限为 300 ppb,响应百分比为 5.2%,令人印象深刻。在优化条件下,合成材料具有很高的选择性,在 NO2、NH3、CO、CO2 和 H2S 中,合成材料对 NO2 气体的响应百分比最高。
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