在室温下使用Cd-ZnFe薄膜检测NH3的微量检测2O4
Ravikumar Thangavel1, Kalainathan Sivaperuman1, Logu Thirumalaisamy2
1Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore 632014, India.
iScience
|January 7, 2026
概括
这项研究开发了经济高效的氨 (NH3) 气体传感器,使用添加酸 (Cd-doped ZnFe2O4) 薄膜. 性能最好的传感器在室温下检测到低度的NH3,具有高灵敏度和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学传感器 化学传感器
- 纳米技术 纳米技术
背景情况:
- 检测氨 (NH3) 气体对于工业,环境和安全应用至关重要.
- 开发经济高效的室温NH3传感器仍然是一个挑战.
- 金属氧化物半导体由于其可调节的电子特性,为气体传感提供了潜力.
研究的目的:
- 开发经济高效的氨 (NH3) 气体传感器,在室温下运行.
- 研究 (Cd) 兴奋剂对用于NH3检测的ZnFe2O4薄膜的传感性能的影响.
- 为了优化Cd-doped ZnFe2O4的组成,以提高气体传感性能.
主要方法:
- 用Cd-doped ZnFe2O4 (Cd_xZn_1-xFe2O4) 的薄膜使用喷雾热解技术进行合成.
- 气体传感性能通过测量在室温下对不同度的NH3的反应来评估.
- 材料的表征包括对形态,组成和结构性质的分析.
主要成果:
- 与未经兴奋剂的ZnFe2O4.4相比,Cd兴奋剂的ZnFe2O4薄膜表现出明显增强的NH3传感性能.
- Cd0.5Zn0.5Fe2O4 (ZFCD5) 薄膜显示了最高的响应 (约. 8) 在1 ppm NH3.3下.
- 该ZFCD5传感器显示了快速响应 (105秒) 和恢复 (54秒) 时间,高灵敏度 (10.07ppm^-1),可重复性,选择性和稳定性超过6周.
- 改进的传感性能归因于从角棒状形态和增强的电荷转移中增加了活性部位.
- 加入Cd提高了缺陷密度和吸附-脱附效率,导致反应增加了10倍.
结论:
- 用Cd合的ZnFe2O4薄膜是开发高度敏感和高效的室温NH3传感器的有希望的材料.
- 喷雾热解法是制造这些传感器材料的有效方法.
- 这些传感器在工业监控,环境保护和安全系统中具有潜在的应用.
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