電容去離子(CDI)是新穎的水再生技術，透過施加低外部電壓形成靜電場，將水中的離子吸附到電極的孔洞之中，是具有低能耗、低成本的優勢。在本研究中，運用靜電紡絲技術製備出碳纖維(CF)，作為電容器的電極使用，再利用水熱合成法、電鍍法與滴製法，製成複合錳氧化物的碳奈米纖維，透過掃描式電子顯微鏡觀察纖維的形貌，運用循環伏安法檢測電極的電化學性能，透過此方式篩選出電鍍方法所製備的複合電極(MnCF-EP)進行脫鹽與結晶紫(CV)脫色的電容去離子實驗。 此研究結果顯示，在NaCl與CV溶液中，CF與MnCF-EP兩種電極皆具有去除NaCl與CV的能力。在NaCl與CV混合溶液中，CF與MnCF EP電極對CV的去除率分別為8.77%與33.43%，在此MnCF-EP具有較優異的去除率是因為電極不同於CF的特性，MnCF-EP具有MnOx附著、粗糙的表面、較多的孔隙，以及多了OH基提升親水性。MnCF-EP透過吸附、氧化與類似染料敏化太陽能電池的反應，將CV從溶液中去除。 結果表明，複合MnOx在CF上可能會帶來催化的效果，將此種電極用於CDI中，能同時去除離子與有機物。操作後的電極可觀察到電極發生的改變。結果表明製備的CF與MnCF-EP電極皆具有從含有NaCl的水中去除CV的能力，同時MnCF-EP對CV的去除能力優於CF。 ;Capacitive deionization (CDI) is a novel water regeneration technology. Through applied a low external voltage to form an electrostatic field, ions are adsorbed into the pores of the electrode, which has the advantages of low energy consumption and low cost. Manganese oxidation complex carbon fiber electrode (MnCF) was prepared by hydrothermal synthesis, electrodeposition, and dripping. The morphology characteristics of the fibers were observed by field emission scanning electron microscope, and the electrochemical performance of the electrode was detected by cyclic voltammetry. In this way, the composite electrode prepared by electrodeposition was chosen for CDI experiments of desalination and crystal violet (CV) decolorization. The result showed that the CF and MnCF-EP electrode had ability to remove NaCl and CV from NaCl or CV solution. In the NaCl and CV mixed solution, the removal efficiency by CF and MnCF-EP electrode had 8.77% and 43.28%, respectively. MnCF-EP electrode had better removal efficiency than CF, because of the different characteristics. MnCF-EP had MnOx, rough surface, more pores, and -OH group to improve hydrophilicity. The MnCF-EP could remove CV from the solution by adsorption, oxidation, and reaction similar to dye-sensitized solar cell. The result suggested that composite of MnOx on CF may introduce catalytic properties on CF. The CDI equipped with such electrodes can remove ions and organic compounds at the same time. The change of used electrode could be observed. The CF and MnCF-EP electrodes both had ability to remove the CV from the solution, and MnCF-EP had better ability than CF.
