涂覆SnO_(2)-WO_(3)的微光纤甲烷气体传感器  

SnO_(2)-WO_(3) Nanomaterials Coated Microfiber Methane Gas Sensor

作　　者：陈苗 傅海威[1] 肖家悦 李根 程嘉慧 丁继军[1] CHEN Miao;FU Haiwei;XIAO Jiayue;LI Gen;CHENG Jiahui;DING Jijun(Shaanxi Engineering Research Center of Oil and Gas Resource Optical Fiber Detection,Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells,Xi'an Shiyou University,Xi'an,China)

机构地区：[1]西安石油大学陕西省油气资源光纤探测工程研究中心和陕西省油气井测控技术重点实验室,西安

出　　处：《光电技术应用》2024年第2期37-43,共7页Electro-Optic Technology Application

摘　　要：提出并展示了一种用于甲烷浓度检测的SnO_(2)-WO_(3)纳米花涂覆微光纤双锥干涉仪(MFI)。采用多芯光纤熔融双锥法制备锥形MFI。采用水热法和浸渍法合成了甲烷敏感材料SnO_(2)-WO_(3)。采用滴涂法在MFI结构外部涂覆SnO_(2)-WO_(3)材料。当甲烷分子吸附在涂层材料上时,材料的折射率会发生变化,从而引起传感器的透射光谱发生变化。因此,可以通过测量光谱的波长漂移来检测甲烷浓度。实验结果表明,SnO_(2)-WO_(3)纳米花包覆MFI传感器具有较大的浓度检测范围和较高的室温稳定性。测量甲烷浓度范围为0~34%,灵敏度约为0.11nm/%。还对传感器的选择性进行了研究。对异丙醇、甲醇、乙醇和甲烷的反应进行了研究和比较。结果表明,该传感器对甲烷具有较高的吸附选择性,在矿井瓦斯检测与预警领域具有潜在的应用前景。An SnO_(2)-WO_(3) nanometer flowers coated microfiber bi-taper interferometer(MFI)for methane concentration detection is proposed and demonstrated.The tapered MFI is fabricated by fused bi-tapers method with the multi-core fiber.The methane sensitive materials SnO_(2)-WO_(3) is synthesized by using hydrothermal and impregnation methods.And the SnO_(2)-WO_(3) material is coated on the MFI structure outsides by using the drop coating method.When the methane molecules is adsorbed on the coating material,the refractive index of the material will be changed,which will cause the transmission spectrum of the sensor changed.So,the methane concentration can be detected by measuring the wavelength shift of the spectrum.Experimental results show that the SnO_(2)-WO_(3) nano-flower coated MFI sensor has large concentration detection range and high stability at room temperature.The measurement methane concentration range is 0~34%,the sensitivity is about 0.11 nm/%.The selectivity of the sensor is also studied.The responses of isopropyl alcohol,methanol,alcohol and methane are studied and compared,the results show that the sensor has high adsorption selectivity of methane,which has potential application in the field of mine gas detection and early warning.

关 键 词：甲烷气体传感 SnO_(2)-WO_(3)纳米材料 微光纤 干涉 

分 类 号：TN253[电子电信—物理电子学]