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）：可燃气体检测传感器对于职业健康和安全至关重要，可防止燃气设施和地下采矿发生火灾或爆炸。发生火灾或爆炸需要三个条件：燃料源（例如易燃气体或蒸气）、空气（氧气）和点火源（例如火花、明火或高温表面）。因此，用于可燃气体检测的传感器需要在较宽的温度范围内运行。室温离子液体 (IL) 是用于检测可燃气体的潜在新材料。它们在环境压力下的蒸气压可以忽略不计，并且在空气中具有高热稳定性。离子液体的非挥发性及其卓越的热稳定性使其非常适合用作检测可燃气体的涂层，因为它们可以减少与闪点和可燃性相关的危险。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层材料最终会变质，导致其活性丧失。 IL 的合成灵活性使其能够根据广泛的化学多样性进行定制。一种离子可用于提供一种功能，而第二种离子可提供不同的、完全独立的功能。此外，许多离子液体由于其较大的固有电导率和较宽的电化学势窗口而被证明是优异的非水电解质。文献研究表明，气体（即 CH4、C2H4、C2H6、CO2、O2）在离子液体中的气体溶解度差异很大。离子液体中 NH3 和 SO2 的电化学氧化以及 O2 和 CO2 的电化学还原已有报道。因此，我们建议将离子液体独特的溶剂化和电化学特性与正交电化学和石英晶体微天平（QCM）传感器的实时、便携式、低成本特性相结合，开发一种广泛适用于独立/手持式气体的集成可燃气体检测器天然气设施或地下采矿的探测器。该提案主要基于先前的成果，概述了一项研究计划，以了解、设计和控制电极表面离子液体的分子特征，以用于其在可燃气体检测中的应用。甲烷将是初始目标分析物。通过以下项目目标将实现多项创新。首先，开发、表征和优化离子液体化学界面固定化，以形成坚固的刚性薄膜；其次，评估和验证用于甲烷检测的 IL QCM 传感器阵列；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，以提高实际应用的稳定性、灵敏度和选择性。我们的整个研究计划是一项综合工作，如果成功，将对职业安全和健康传感器技术产生重大科学和实际影响，使天然气设施和矿山的工作人员能够防止爆炸或火灾，拯救生命，避免伤害，并保护数十亿人美元价值的资产。气体传感器因其在环境空气监测、职业健康与安全、生物医学诊断、工业过程控制以及军事和民用反恐方面的潜在应用而受到越来越多的关注。近年来矿井爆炸造成的人员伤亡惨案凸显了认识地下煤矿开采潜在危险的重要性，以及系统性安全和健康警惕的必要性。在本提案中，我们的目标是开发新技术，探索离子液体作为传感材料和非水电解质的应用，用于检测工作场所的可燃气体，以防止爆炸或火灾，拯救生命，避免伤害，并保护价值数十亿美元的资产。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.

离子液体-电极界面的高灵敏度电容式气体传感。

DOI：
10.1021/acs.analchem.5b04677
发表时间：
2016-01-12
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：
Xiangqun Zeng

Ionic liquids as green solvents and electrolytes for robust chemical sensor development.

离子液体作为绿色溶剂和电解质，用于稳健的化学传感器开发。