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:
- 金额:$ 18.07万
- 依托单位:
- 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:
- 关键词:
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): 用于可燃气体检测的传感器在职业健康和安全中至关重要,以防止气体设施和地下采矿中的火灾或爆炸。发生火灾或爆炸需要三样东西:燃料源(例如可燃气体或蒸汽)、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宽温度范围内工作。室温离子液体(IL)代表了用于可燃气体检测的潜在新材料。它们在环境压力下的蒸汽压可以忽略不计,在空气中具有很高的热稳定性。离子液体的非挥发性和其显著的热稳定性使其非常适合用作检测可燃气体的涂层,因为它们降低了与闪点和可燃性相关的危险。离子液体也是特别有前途的,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劣化,导致其活性丧失。离子液体的合成灵活性使它们能够适应广泛的化学多样性。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大的固有电导率和宽的电化学电势窗口而被证明是优异的非水电解质。文献研究表明,气体(如CH 4、C2 H4、C2 H6、CO2、O2)在离子液体中的溶解度变化很大。报道了离子液体中NH_3和SO_2的电化学氧化以及O_2和CO_2的电化学还原。因此,我们建议将离子液体独特的溶剂化和电化学性质与正交电化学和石英晶体微天平(QCM)传感器的实时,便携,低成本特性相结合,以开发一种集成的可燃气体检测器,广泛适用于气体设施或地下采矿的独立/手持式气体检测器。 在总结前人研究成果的基础上,提出了一个研究思路,即理解、设计和控制离子液体在电极表面的分子特性,使其应用于可燃气体的检测。甲烷将是初始目标分析物。将通过以下项目目标实现若干创新。首先,开发、表征和优化离子液体化学界面固定,以形成坚固的薄刚性膜;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,最后改进电化学IL传感器以及QCM IL传感器阵列,以增加稳定性,提高灵敏度和选择性,用于真实的世界应用。我们的整个研究计划是一项综合性的努力,如果成功,将对传感器技术在职业安全和健康方面产生重大的科学和实际影响,使天然气设施和矿山的工作人员能够防止爆炸或火灾,挽救生命,避免受伤,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、生物医学诊断、工业过程控制以及军事和民用反恐中的潜在应用而受到越来越多的关注。近年来在矿井爆炸中造成的人员伤亡悲剧加强了认识地下煤矿开采潜在危险的重要性,以及系统安全和健康警惕的必要性。在这项提案中,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:
- 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.
- DOI:10.1039/c5ra06754e
- 发表时间:2015
- 期刊:
- 影响因子:3.9
- 作者:Rehman A;Zeng X
- 通讯作者:Zeng X
Methane-oxygen electrochemical coupling in an ionic liquid: a robust sensor for simultaneous quantification.
- DOI:10.1039/c4an00839a
- 发表时间:2014-10-21
- 期刊:
- 影响因子:0
- 作者:Wang Z;Guo M;Baker GA;Stetter JR;Lin L;Mason AJ;Zeng X
- 通讯作者:Zeng X
Study of ionic liquid immobilization on polyvinyl ferrocene substrates for gas sensor arrays.
- DOI:10.1021/la104191n
- 发表时间:2011-03
- 期刊:
- 影响因子:0
- 作者:Kuang-Yu Hou;A. Rehman;Xiangqun Zeng
- 通讯作者:Kuang-Yu Hou;A. Rehman;Xiangqun Zeng
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XIANGQUN ZENG其他文献
XIANGQUN ZENG的其他文献
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