氨气传感器的基础是未使用和Ca的ZnO纳米粒子
M Hjiri1,2, Saja Algessair1, R Dhahri3
1Department of Physics, College of Sciences, Imam Mohammad Ibn Saud Islamic University (IMSIU) Riyadh 11623 Saudi Arabia mbhjiri@imamu.edu.sa m.hjiri@yahoo.fr +966-506163909.
RSC advances
|February 9, 2024
概括
配氧化 (ZnO) 纳米颗粒显示出用于检测氨气的增强性能. 这种Ca-doped ZnO材料为工业应用中的紧急氨感应需求提供了有希望的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学传感器 化学传感器
背景情况:
- 氨气 (NH3) 由于其毒性和腐蚀性质,给工业带来了重大挑战.
- 开发敏感和选择性氨气传感器对于安全和工艺控制至关重要.
- 氧化 (ZnO) 是一种有前途的半导体材料,用于气体传感应用.
研究的目的:
- 为了合成和表征 (Ca) 合的ZnO纳米粒子用于导电计氨气传感.
- 为了研究不同度的Ca对ZnO的结构和传感性能的影响.
- 评估开发的传感器的传感性能,选择性和响应/恢复时间.
主要方法:
- 在超临界干燥条件下的Ca-doped ZnO纳米颗粒的sol-gel合成.
- 使用X射线衍射 (XRD),扫描电子显微镜 (SEM),传输电子显微镜 (TEM) 和富里埃变换红外 (FTIR) 光谱学进行材料表征.
- 导体计气体传感器测量氨 (NH3) 在各种度和温度下.
主要成果:
- 用Ca添加的ZnO纳米粒子保持了六边形的石结构,在加入Ca时粒子大小增加.
- 1% Ca-doped ZnO 传感器表现出显著的气体反应 (R0/Rg = 33) 到 4000 ppm NH3 在 300 °C.
- 传感器对NH3比CO,CO2和NO2具有良好的选择性,反应快 (5秒) 和恢复 (221秒) 时间.
结论:
- 兴奋剂有效地提高了ZnO纳米颗粒的氨气传感性能.
- 这种Ca-doped ZnO传感器显示出在氨检测中实际应用的潜力.
- 优化的Ca度和工作温度是有效检测氨的关键因素.
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