Fiber-optic carbon dioxide sensor based on fluorinated xerogels doped with HPTS

Fiber-optic carbon dioxide sensor based on fluorinated xerogels doped with HPTS
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DOI：
10.1117/12.784801
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发表时间：
2008-01
期刊：
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影响因子：
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通讯作者：
Y. Lo;Cheng-Shane Chu
Y. Lo;Cheng-Shane Chu
中科院分区：
其他
文献类型：
--
作者：
Y. Lo;Cheng-Shane Chu

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本文提出了一种基于混合干凝胶的高性能光纤二氧化碳 (CO2) 传感器，该混合干凝胶由掺杂有 pH 敏感荧光染料的烷基和全氟烷基 ORMOSIL（有机改性硅酸盐）组成。该传感器薄膜由固定在混合干凝胶内的 1-羟基-3,6,8-芘三磺酸三钠盐（HPTS、PTS-）、四辛基铵阳离子（TOA+）和氢氧化四辛基铵（TOAOH）相转移剂（即碱）组成。该传感器的灵敏度约为 18，对 CO2 浓度在 0 ~ 30% 范围内呈现线性响应。当从纯氮气气氛切换到纯CO2气氛时，传感器的响应时间为1.7秒；从CO2气氛切换到氮气时，传感器的响应时间为38.5秒。
This paper presents a high-performance fiber-optic carbon dioxide (CO2) sensor based on hybrid xerogels composed of alkyl and perfluoroalkyl ORMOSILs (organically modified silicates) doped with pH-sensitive fluorescent dye. The sensor film consists of 1-hydroxy-3,6,8-pyrenetrisulfonic acid trisodium salt (HPTS, PTS-), tetraoctylammonium cation (TOA+), and a tetraoctylammonium hydroxide (TOAOH) phase transfer agent (i.e. the base) immobilized within the hybrid xerogels. The sensor has a sensitivity of approximately 18 and exhibits a linear response for CO2 concentrations in the range 0 ~ 30 %. The response time of the sensor is 1.7 s when switching from a pure nitrogen atmosphere to a pure CO2 atmosphere and 38.5 s when switching from CO2 to nitrogen.