銅氧化物 (CuxOy) 具有良好的催化活性，可因應需求製備不同形狀之氧化銅。製備CuxOy的常見方式為利用批次製程，但可能造成反應不均一，且較難控制反應物加入的體積。微流道系統具有連續製備、可彈性設計及良好的熱傳及質傳的性質，故具有潛力應用於製備奈米粒子。因此本研究主要分為三個部分，第一部分為利用微流道系統製備CuxOy粒子，藉由改變還原劑、界面活性劑濃度及流率控制粒子的形狀及大小，第二部分為利用氧化鐵 (Fe3O4) 可被磁鐵收集之性質，以氫氧化鈉或氨水作為水解劑於微流道系統，製備具有磁性的Fe3O4及CuO-Fe3O4奈米粒子，先最適化製備Fe3O4所需之反應時間及參數，再將最適化位置改變為硝酸銅進料位置以製備CuO-Fe3O4。在第一及第二部份，本研究分別以場發射電子顯微鏡 (FE-SEM)、 X光繞射儀 (XRD)、 超導量子干涉儀 (SQUID) 、及界達電位分析儀 (ZetaPALS)等儀器，並分別對CuxOy、Fe3O4以及CuO-Fe3O4進行粒子形狀、結晶型態以及相關物性分析，以確認CuO成功製備於Fe3O4粒子表面。第三部分則將製備的CuO-Fe3O4，利用芬頓法進行有機染料的降解，降解目標物分別為10 ppm之亞甲基藍 (methylene blue, MB)、 甲基橙 (methyl orange, MO)以及4-硝基苯酚 (4-nitrophenol, 4-NP)，計算其降解率，並利用擬一級反應方程式 (pseudo-first-order reaction equation )計算的反應常數k，探討CuO-Fe3O4降解有機染料的反應速率。本研究先以亞甲基藍作為降解目標，以0.25 M氫氧化鈉製備的CuO-Fe3O4對其降解速率最高，經降解24小時後，降解率可達99.6 %，反應常數k為0.185 h-1，完成降解後，再以磁鐵收集CuO-Fe3O4並秤重，以及利用碘化鉀量測經降解24小時，過氧化氫之濃度。此外，再以最適化之CuO-Fe3O4分別降解甲基橙及4-硝基苯酚，經降解24小時後，對甲基橙降解率可達97.6 %，且反應常數k為0.288 h-1；對4-硝基苯酚降解率可達82.8 %，且反應常數k為0.151 h-1。

Copper oxide (CuxOy) possesses good catalytic properties and can be facilely prepared into different shapes, depending on the intended applications. So far, CuxOy is conventionally prepared by a batch process, which may cause nonhomogeneous reaction and pose difficulties to control the reaction volume. Microfluidic system has several characteristic advantages, such as continuous preparation, flexible design, good heat transfer and mass transfer, which offers great potential for preparation of various metal and metal oxide nanoparticles. Therefore, this study were aimed to synthesize CuxOy nanostructures and its composites by a microfluidic system, which composed of the following three parts. In the first part of this thesis, CuxO¬y was prepared by adjusting the reducing agent concentrations, surfactant concentrations, and the reactant flow rates to control shapes and sizes of the resulting CuxOy. In the second part, CuxO¬y ¬was incorporated with Fe3O4 nanoparticles to provide a magnetic property to the catalyst. NaOH and NH4OH were used to prepare Fe3O4 and CuO-Fe3O4 via a microreactor system. The reaction time and other parameters were firstly optimized, followed by the optimization of the feeding entry of CuSO4. The physical and chemical properties of the resulting CuxOy, Fe3O4, and composite CuO-Fe3O4 nanoparticles were characterized by FESEM, XRD, SQUID, and ZetaPALS.
In the third part of this thesis, CuO-Fe3O4 was applied for the degradation of organic dye, including methylene blue (MB), methyl orange (MO), and 4-nitrophenol (4-NP). The reaction rate k was calculated following a pseudo-first-order reaction kinetics to compare the degradation rate constant. CuO-Fe3O4, which was prepared from 0.25 M NaOH, can achieve the highest degradation percentage (99.6%) for MB dye after 24 hours and the degradation rate constant k was found to be 0.185 h-1. After degradation, the CuO-Fe3O4 can be easily collected by a magnet and the weight of CuO-Fe3O4 was measured. Potassium iodide (KI) was used to detect the H2O2 concentration after degradation reaction. In addition, CuO-Fe3O4 was employed for the degradation of MO dye and 4-NP. For the degradation of MO, the degradation efficiency can achieve 97.6% after 24 hour and the degradation rate constant k was 0.288 h-1. For the degradation of 4-NP, the degradation can achieve 82.8 % after 24 hour and the rate of degradation k was 0.151 h-1.

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