Ionic Liquid Gas Sensors for Detection of Flammable Gases In Workplace

用于检测工作场所可燃气体的离子液体气体传感器

基本信息

批准号：
7925620
负责人：
XIANGQUN ZENG
金额：
$ 18.07万
依托单位：
OAKLAND UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2009
资助国家：
美国
起止时间：
2009-08-01 至 2012-07-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/7925620
关键词：
Ionic Liquid Gas Sensors Detection

项目摘要

DESCRIPTION (provided by applicant): Sensors for flammable gas detection are essential in occupational health and safety to prevent fire or explosion in gas facilities and underground mining. Three things are needed to support a fire or explosion: a source of fuel (e.g. flammable gas or vapor), air (oxygen) and a source of ignition (e.g. spark, open flame, or high temperature surface). As a result, a sensor for flammable gas detection requires it functioning over a broad temperature range. Room-temperature Ionic Liquids (ILs) represent potential new materials for use in the detection of flammable gases. They have negligible vapor pressure at ambient pressure and possess high thermal stability in air. The nonvolatile nature of ionic liquids and their remarkable thermal stability make them well suited for use as coatings for the detection of flammable gases since they reduce hazards, associated with flash points and flammability. Ionic liquids are also particularly promising because they have the potential to be incredibly stable whereas many polymer or organic coating materials eventually deteriorate leading to their loss of activity. The synthetic flexibility of ILs allows them to be tailored with broad chemical diversity. One ion can be used to provide one function and the second ion can provide a different, completely independent function. Additionally, many ILs are proven to be excellent non-aqueous electrolytes due to their large intrinsic conductivity and wide electrochemical potential windows. Literature study shows that gases (i.e.CH4, C2H4, C2H6, CO2, O2) have widely varying gas solubility in ILs. Electrochemical oxidation of NH3 and SO2 and electrochemical reduction of O2 and CO2 in ILs have been reported. Therefore, we propose to integrate ILs unique solvation and electrochemical properties with real-time, portable, low cost characters of orthogonal Electrochemical and Quartz Crystal Microbalance (QCM) transducers to develop an integrated flammable gas detector widely applicable as a standalone/hand-held gas detector at gas facilities or underground mining. Based substantially on prior achievements, this proposal outlines a research plan to understand, design and control molecular character of ionic liquids on electrode surfaces for their applications in detection of flammable gases. Methane will be the initial target analyte. Several innovations would be realized through the following project Aims. First, develop, characterize and optimize ionic liquid chemical interface immobilization in order to form robust, thin rigid films; Second, evaluate and validate the IL QCM sensor array for methane detection; Third, develop IL electrochemical sensors for methane detection and finally refine the electrochemical IL sensors as well as the QCM IL sensor array to Increase stability, heighten sensitivity and selectivity for real world applications. Our entire research plan is an integrated effort which if successful will have substantial scientific and practical impact in sensor technology for occupational safety and health that could enable personnel in gas facilities and mines to prevent explosions or fires, save lives, avoid injuries, and protect billions of dollars worth of assets. Gas sensors are of increasing interest due to their potential applications in ambient air monitoring, occupational health and safety, biomedical diagnostics, industrial process control, and military and civilian counter-terrorism. The tragedies of human loss in mine explosions in recent years reinforce the importance of recognizing the potential hazards in underground coal mining, and the need for systematic safety and health vigilance. In this proposal, we aim to develop new technology that explore ionic liquids' application as sensing materials and non-aqueous electrolytes for detection of flammable gases at workplace to prevent explosions or fires, save lives, avoid injuries, and protect billions of dollars worth of assets.

描述（由申请人提供）：可易燃气体检测的传感器对于预防气体设施和地下采矿的起火或爆炸至关重要。支持火灾或爆炸需要三件事：燃料（例如易燃气体或蒸气），空气（氧气）和点火源（例如火花，开放火焰或高温表面）。结果，易燃气体检测的传感器需要在较大的温度范围内发挥作用。室温离子液体（ILS）代表了用于检测易燃气体的潜在新材料。它们在环境压力下具有可忽略的蒸气压力，并且在空气中具有较高的热稳定性。离子液体的非易失性性质及其显着的热稳定性使它们非常适合用作涂层，用于检测易燃气体，因为它们减少了危险，与闪点和易燃性有关。离子液体也特别有前途，因为它们具有令人难以置信的稳定性，而许多聚合物或有机涂料材料最终导致其活性丧失。 IL的合成灵活性使它们可以通过广泛的化学多样性来量身定制。一个离子可用于提供一个功能，第二离子可以提供不同的，完全独立的功能。此外，由于其内在电导率较大和宽的电化学潜在窗口，因此许多IL被证明是极好的非水电器。文献研究表明，气体（即CH4，C2H4，C2H6，CO2，O2）在IL中的气体溶解度差异很大。据报道，NH3和SO2的电化学氧化以及IL中O2和CO2的电化学还原。因此，我们建议将ILS独特的溶剂化和电化学特性与实时，便携式，低成本的低成本特征的正交电化学和石英水晶微量平衡（QCM）传感器，以开发一种综合的易燃气体检测器，广泛适用于独立的/手持式气体探测器作为一种独立/手持式气体探测器在气体或地下的地下销售中。该提案基本上基于先前的成就，概述了一个研究计划，以了解，设计和控制电极表面上离子液体的分子特征，以用于检测易燃气体。甲烷将是初始目标分析物。以下项目的目标将实现几项创新。首先，开发，表征和优化固定的离子液体化学界面，以形成坚固的薄膜；其次，评估和验证IL QCM传感器阵列以进行甲烷检测；第三，开发用于甲烷检测的IL电化学传感器，并最终完善电化学IL传感器以及QCM IL传感器阵列，以提高稳定性，提高对现实世界应用的灵敏度和选择性。我们的整个研究计划是一项综合努力，如果成功将对传感器技术产生实质性的科学和实际影响，以实现职业安全和健康，这可以使天然气设施和矿山的人员能够防止爆炸或火灾，挽救生命，避免伤害，并保护价值数十亿美元的资产。气体传感器由于其在环境空气监测，职业健康和安全性，生物医学诊断，工业过程控制以及军事和平民反恐方面的潜在应用而引起了人们的兴趣。近年来，矿山中的人类损失的悲剧增强了认识地下煤采矿中潜在危害的重要性，以及对系统安全和健康警惕的需求。在此提案中，我们旨在开发新技术，以探索离子液体作为感应材料和非水电器的应用，以检测工作场所易燃气体，以防止爆炸或火灾，挽救生命，避免伤害，并保护价值数十亿美元的资产。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Highly Sensitive Capacitive Gas Sensing at Ionic Liquid-Electrode Interfaces.

DOI：
10.1021/acs.analchem.5b04677
发表时间：
2016-01
期刊：
Analytical chemistry
影响因子：
7.4
作者：
Zhe Wang;Min Guo;Xiaoyi Mu;Soumyo Sen;Thomas I. Insley;A. Mason;P. Král;Xiangqun Zeng
通讯作者：
Zhe Wang;Min Guo;Xiaoyi Mu;Soumyo Sen;Thomas I. Insley;A. Mason;P. Král;Xiangqun Zeng

Methods and approaches of utilizing ionic liquids as gas sensing materials.