Scholarlink

<p>Nitrogen dioxide (NO<sub>2</sub>) is a highly reactive oxidizing gas that is considered one of the most dangerous and toxic atmospheric pollutants. Due to its significant impact on environmental and human health, strict monitoring, and control of NO<sub>2</sub> levels are essential. In this context, metal oxide semiconductor (MOS)-based gas sensors have emerged as an effective and practical solution for detecting NO<sub>2</sub>. In this work, we report a tin oxide (SnO<sub>2</sub>) based gas sensor by incorporating gold (Au) nanoparticles. This Au–SnO<sub>2</sub> nanocomposite-based gas sensor exhibits a high response of 107 for 20&#xa0;ppm NO<sub>2</sub> gas at an optimum temperature of 150&#xa0;°C. The sensor exhibits good repeatability, and it had a fast response and recovery time of 12&#xa0;s and 31&#xa0;s, respectively, when exposed to 20&#xa0;ppm of NO<sub>2</sub> gas. Its response to carbon monoxide (CO), methane (CH<sub>4</sub>), Ammonia (NH<sub>3</sub>), Ethanol (C<sub>2</sub>H<sub>5</sub>OH)&#xa0;and Acetone (C<sub>3</sub>H<sub>6</sub>O) is significantly weaker than to NO<sub>2</sub>, showcasing the sensor’s preference for detecting NO<sub>2</sub>.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enabling higher sensitivity and selectivity toward NO2 using gold-decorated SnO2 nanospheres

  • 期刊论文

  • 发表日期：

    2026年5月14日

查看全文
  • M Niveditha,
  • Bidesh Mahata,
  • Gaurav Siddharth,
  • M. K. Ravi Varma,
  • Biswajit Mandal

摘要

Nitrogen dioxide (NO2) is a highly reactive oxidizing gas that is considered one of the most dangerous and toxic atmospheric pollutants. Due to its significant impact on environmental and human health, strict monitoring, and control of NO2 levels are essential. In this context, metal oxide semiconductor (MOS)-based gas sensors have emerged as an effective and practical solution for detecting NO2. In this work, we report a tin oxide (SnO2) based gas sensor by incorporating gold (Au) nanoparticles. This Au–SnO2 nanocomposite-based gas sensor exhibits a high response of 107 for 20 ppm NO2 gas at an optimum temperature of 150 °C. The sensor exhibits good repeatability, and it had a fast response and recovery time of 12 s and 31 s, respectively, when exposed to 20 ppm of NO2 gas. Its response to carbon monoxide (CO), methane (CH4), Ammonia (NH3), Ethanol (C2H5OH) and Acetone (C3H6O) is significantly weaker than to NO2, showcasing the sensor’s preference for detecting NO2.