本研究之目標為將氣相電泳法結合微流道系統，用以合成與即時定量分析金屬-有機框架與其衍生奈米材料。
在第一部分的研究中，我們開發一以氣相電泳法為基礎之高解析度即時分析技術與方法: 電噴灑式氣相奈米粒子電移動度即時分析儀 (In-Situ Electrospray-differential mobility analyzer, In-Situ ES-DMA)，用以研究金屬-有機框架 (Metal-organic frameworks, MOFs) 膠體奈米粒子於連續式微流體液滴合成系統的製備與合成，並選用ZIF-8 (Zeolitic imidazolate frameworks, ZIF-8) 作為連續式微流體液滴反應系統合成之金屬-有機框架奈米材料。
首先，我們藉由連續式ES-DMA即時性量測的結果，找到樣品在利用醋酸胺溶液稀釋20倍的條件下，會有很好的量測穩定性與再現性。接著，在固定此稀釋倍率的條件下，我們利用連續式ES-DMA即時觀察ZIF-8於連續式微流體液滴合成系統中生長的情形，探討在不同前驅物莫耳比例與合成溫度的條件下，其電移動度粒徑分布、數量濃度等基本性質的變化，並藉由ES-DMA公式之間的轉換得到樣品的產率。除此之外，我們也結合靜電收集器的影像分析，提供連續式ES-DMA相輔之分析結果，並分別利用其他儀器的輔助分析，觀察ZIF-8的合成、晶徑大小與孔洞結構變化。結果指出，隨著2-甲基咪唑/硝酸鋅前驅物莫耳濃度比例的降低與合成溫度提高的條件下，ZIF-8的電移動度粒徑與晶徑大小會隨之增加，但其數量濃度、比表面積、微孔體積與產率則會有所降低。
因此，我們成功開發出一高解析度連續式ES-DMA即時分析方法，並藉由合成參數條件的改變，觀察ZIF-8奈米粒徑尺寸與數量濃度的變化，進一步探討金屬有機框架膠體奈米材料於微流體液滴反應系統中的合成機制，以利後續MOF奈米材料性能表現的優化與改善。
而在第二部分的研究中，我們將氣相奈米粒子電移動度即時分析儀 (Differential mobility analyzer, DMA) 結合微流體液滴系統與氣溶膠合成系統，用以研究MOF衍生混成式奈米結構觸媒的合成，並將觸媒應用於逆水氣反應中，以期提升二氧化碳再利用之效能。
我們選用以銅為金屬節點之HKUST-1合成 MOF衍生混成式奈米結構觸媒，並利用DMA即時分析的結果，與其結合靜電收集器的影像分析，探討在不同奈米粒子為載體與前驅物濃度變化的條件下，在不同合成階段其電移動度粒徑分布、粒子形貌與樣品表面元素組成含量的變化，並藉由其他儀器的輔助分析，了解樣品的熱穩定性、結晶程度、比表面積以及孔體積。結果指出，連續式微流體液滴系統可以成功合成具有微米級結構之MOF混成式膠體粒子，並經由氣溶膠系統合成出MOF衍生混成式奈米觸媒。其中，以二氧化鈰為載體之MOF衍生混成式奈米材料的平均電移動度粒徑、金屬表面積與金屬銅的晶徑，會隨著樣品中金屬銅比例的增加而提升，而觸媒的表面積、孔洞體積、金屬分散度則會與金屬銅的比例呈現相反的趨勢。此外，選擇以在溶液中相較二氧化鈰於具有更好分散性的氧化鋁奈米粒子作為載體，可以使金屬銅更均勻地分布在載體，並使金屬銅的晶徑降低。
因此，透過氣相奈米粒子電移動度即時分析系統，可以即時探討連續式微流體液滴系統結合氣溶膠技術系統所合成的MOF衍生混成式奈米觸媒，其前驅物濃度與載體選擇對於觸媒材料性質的影響，並了解觸媒與後續逆水氣反應活性測試表現的關聯性，將有利於後續相關MOF衍生混成式奈米結構觸媒材料於此連續式合成系統的設計開發與二氧化碳再利用領域的應用。

In this study, we demonstrate a real-time quantifying microfluidic-based synthesis of metal-organic framework and MOF-derived hybrid nanomaterials using the gas-phase electrophoretic method.
In the first part of the work, a hyphenated electrospray-differential mobility analysis (ES-DMA) is developed for providing a high-resolution quantitative analysis for the metal-organic framework (MOF) colloid produced via microfluidic-based controlled synthesis. Zeolitic Imidazolate Framework-8 (ZIF-8) was chosen as the representative MOF of the study. The work successfully demonstrates a real-time analytic approach for the assurance of product quality and the concept of size control at the range of 100 to 200 nanometers through the changes of synthetic parameters using hyphenated electrospray-differential mobility analysis (ES-DMA). The mechanistic understanding of MOFs synthesized in microfluidic reactor is also useful for the prediction of the corresponding performance and material optimization in microfluidic synthesis of colloidal MOFs.
In the second part of the work, a hyphenated differential mobility analysis (DMA) combined with microfluidic-based aerosol synthesis system is developed for understanding the synthesis of metal-organic frameworks (MOFs) derived hybrid nanostructured catalysts. The effect of precursor concentration and carrier selection on the properties of the catalyst are investigated, as well as the correlation between the catalyst and their performance in reverse water-gas shift reaction. The work facilitates the production and the designed concept of relevant MOF-derived hybrid nanostructured catalysts in the continuous synthesis system and the enhancement of applications in carbon dioxide capture and utilization.

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