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Cu-doped SnO₂/rGO纳米复合材料用于在低温下超敏感的H₂S检测

Tingting Chen^1,2, Jianhai Sun¹, Ning Xue¹

¹State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, 100194 Beijing, China.

Microsystems & nanoengineering

|June 1, 2023

概括

这项研究引入了新型的二氧化/减少氧化石墨烯 (Cu-SnO2/rGO) 纳米复合材料,用于在低温下高度敏感的硫化 (H2S) 气体检测. 新材料显著优于传统传感器,提供更好的选择性和稳定性.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
传感器技术传感器技术

背景情况:

精确的硫化 (H2S) 检测至关重要,但在实现高灵敏度,选择性和低检测极限方面仍然存在挑战,特别是在降低的操作温度下.
现有的H2S传感器在高湿度等不同环境条件下经常面临性能下降的问题.

研究的目的:

开发和描述新的Cu-doped SnO2/rGO纳米复合材料,用于增强的H2S气体传感.
评估开发材料在低温下的传感性能,包括灵敏度,选择性,响应时间和稳定性.

主要方法:

简单的溶热合成方法用于制备 Cu-doped SnO2/rGO 纳米复合材料.
使用分析表面形态,化学成分和晶体缺陷的技术进行全面的表征.
基于用于H2S检测的合成纳米复合材料的气体传感器的制造和测试.

主要成果:

最佳传感器对120°C的10 ppm H2S呈现出高响应 (~1415.7),明显超过原始的SnO2.2.
证明了出色的选择性,广泛的线性工作范围 (1-150 ppm,R2=0.991),快速响应 (31s到2 ppm) 和ppb级检测 (50 ppb).
在90%的湿度下保持高性能,并显示出出色的长期稳定性.

结论:

Cu-doped SnO2/rGO纳米复合材料是非常有前途的材料,用于在低温下敏感和选择性地检测H2S.
增强的性能归因于Cu-SnO2和rGO之间的协同效应,促进了催化敏感化和高效的电子/孔转移.
开发的传感器技术为在具有挑战性的环境条件下进行H2S监测提供了强大的解决方案.

关键词:

有机-无机纳米结构.传感器传感器传感器

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