基于ZIF-8材料调制的光纤CO2与CH4浓度传感器
ZIF-8 Modified Optical Fiber Sensor for CO2 and CH4 Sensing
DOI: 10.12677/jsta.2026.143040, PDF,    科研立项经费支持
作者: 毛 霖, 刘书辉, 洪茜茜, 曹芮荧：武汉工程大学光电信息与能源工程学院、数理学院，湖北 武汉
关键词: 光纤传感器；ZIF-8；液芯光纤干涉仪；二氧化碳；甲烷；气体浓度传感；Fiber Optic Sensor； ZIF-8； Liquid-Core Fiber Interferometer； Carbon Dioxide； Methane； Gas Concentration Sensing
摘要: 本文提出并验证了一种用于CO2和CH4浓度传感的ZIF-8涂覆液芯光纤干涉仪。传感部分由一段填充折射率为1.35溶液的石英毛细管两端熔接单模光纤构成，毛细管外表面采用滴涂法涂覆ZIF-8。ZIF-8吸附气体后折射率变化引起包层模式有效折射率变化，导致干涉光谱漂移。实验采用流量计配制0%~100%的CO2/N2和CH4/N2混合气，在室温下持续通入进行测试。结果表明：CO2浓度灵敏度约为18.6 pm/%，CH4浓度灵敏度约为9.7 pm/%，两种气体浓度增加时透射波谷均发生红移；多次通入/排出气体循环测试表明传感器具有良好的重复性和稳定性。所提传感器结构简单、易于制备，适用于环境和工业场景下的CO2与CH4浓度监测。
Abstract: This paper proposes and validates a ZIF-8-coated liquid-core fiber interferometer for CO2 and CH4 concentration sensing. The sensing section consists of a quartz capillary filled with a solution of refractive index 1.35, fused between two single-mode fibers, with ZIF-8 deposited on the outer surface via the dip-coating method. Upon gas adsorption, the refractive index change of ZIF-8 alters the effective refractive index of the cladding mode, causing interference spectrum drift. Experiments employed a mass flow controller to prepare 0%~100% CO2/N2 and CH4/N2 mixed gases, which were continuously introduced for testing at room temperature. Results indicate: CO2 concentration sensitivity of approximately 18.6 pm/%, CH4 concentration sensitivity of approximately 9.7 pm/%, with transmission minima red-shifting as both gas concentrations increased; repeated gas introduction/exhaust cycles demonstrated excellent repeatability and stability of the sensor. The proposed sensor features a simple structure and facile fabrication, making it suitable for CO2 and CH4 concentration monitoring in environmental and industrial applications.
文章引用：毛霖, 刘书辉, 洪茜茜, 曹芮荧. 基于ZIF-8材料调制的光纤CO2与CH4浓度传感器[J]. 传感器技术与应用, 2026, 14(3): 400-408. https://doi.org/10.12677/jsta.2026.143040

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