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Microporous catalytic combustion sensors: Devices and novel composite materials.

机译:微孔催化燃烧传感器:设备和新型复合材料。

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The ease with which transducers can be manufactured for chemical sensing applications vastly surpasses the ease with which they can be imbued with meaningful chemical selectivity. This work details the top-to-bottom functional design, synthesis and characterization of catalytic nanoassembled zeolite/ceramic composite materials. These materials are designed with the goal of being able to tune the selectivity of exothermic catalytic reactions which, on their own, typically possess little or no intrinsic reactant selectivity. The envisioned tunable selectivity stems from: (i) any selective activity the catalyst may have towards the reactants convoluted with (ii) the molecular sieving properties imposed on the reaction by a zeolite shell synthesized around the catalyst-containing sample. The synthetic procedures I have developed in this work allow both reactive and diffusive properties to be independently manipulated during synthesis, and enable the fabrication of sensing materials with the potential for being vastly more versatile than currently-existing materials.; The synthesis of these materials is motivated by earlier studies of zeolite-modified microcalorimetric gas sensors, also presented in this work. These studies show that zeolite-based materials can be used to give differing responses to analyte gases. The fabrication of a high-throughput in situ infrared thermographic reactor for the analysis of the materials syntesized in this work is also presented here.
机译:换能器为化学传感应用而制造的简易性大大超过了它们具有有意义的化学选择性的简易性。这项工作详细介绍了催化纳米组装沸石/陶瓷复合材料的从上到下的功能设计,合成和表征。设计这些材料的目的是能够调节放热催化反应的选择性,而放热催化反应本身通常很少或没有固有的反应物选择性。预期的可调选择性来自于:(i)催化剂可能对卷积的反应物具有任何选择性活性,(ii)通过在含催化剂的样品周围合成的沸石壳对反应施加的分子筛分性能。我在这项工作中开发的合成程序允许在合成过程中独立地控制反应性和扩散性,并且使传感材料的制造具有比目前现有材料广泛得多的潜力。这些材料的合成是由沸石改性的微量热传感器的早期研究推动的,这项工作也介绍了该技术。这些研究表明,基于沸石的材料可用于对分析物气体产生不同的响应。本文还介绍了高通量原位红外热成像反应器的制造,该反应器用于分析合成的材料。

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