臺灣博碩士論文加值系統

本研究主要以碳布(Carbon cloth)作為電極，並以石墨片做為集電器。先以液相沉積法(LPD)升溫60℃利用0.2 M六氟鈦酸銨((NH4)2TiF6)以及不同濃度硼酸(H3BO3)覆蓋在碳布上製備TiO2/CC電極，再以不同濃度的六水硝酸鈷(Co(NO3)·6H2O)、六水硝酸鎳(Co(NO3)·6H2O)以及尿素(CON2H4)利用高壓反應釜升溫95℃持續時間6 hr合成出Co3O4/TiO2/CC薄膜電極，最後經由不同退火溫度評估結晶相以及電化學分析。
實驗結果顯示表示，使用0.3 M硼酸，搭配25 mM(Co(NO3)·6H2O)、50mM (Co(NO3)·6H2O)形成1:2/TiO2/CC結構碳布電極，比電容值可以到280.89 F/g。再以1:2/TiO2/CC結構碳布電極350℃在大氣中退火，比電容值可達到690.89 F/g，提升了59.3%具有優異的電化學性能。後續做脫鹽測試，實驗結果量測條件以間距5 mm、電壓1.2 V以及電解液濃度5 mM NaCl。利用最佳參數1:2/TiO2/CC退火溫度350℃脫鹽測試，電導度由639 µS下降至493 µS脫鹽效率為22.8%。最後做30次反覆吸脫附測試，實驗結果以純碳布以及最佳參數1:2/TiO2/CC退火350℃做對照組，脫鹽效率由5.1%提升至14.6%，提升了65.0%。

In this study, carbon cloth was used as the film electrode, and graphite sheet was used as the current collector. Firstly, the TiO2/CC electrode was prepared by covering the carbon cloth with 0.2 M Ammonium hexafluorotitanate ((NH4)2TiF6) and different concentrations of Boric acid (H3BO3) at a temperature of 60℃ by liquid phase deposition (LPD). Second, different concentrations of Cobalt nitrate hexahydrate (Co(NO3)·6H2O), Nickel nitrate hexahydrate (Co(NO3)·6H2O), and Diaminomethanal (CON2H4) were synthesized in an high pressure reactor at 95°C for 6 hr. The Co3O4/TiO2/CC thin film electrode was produced. Finally, the crystalline phase and electrochemical analysis were evaluated through different annealing temperatures.
The experimental results show that using 0.3 M boric acid and 25 mM (Co(NO3)·6H2O) 50 mM (Co(NO3)·6H2O) to form a 1:2/TiO2/CC structure carbon cloth electrode, the specific capacitance is as high as 280.89 F /g. Then with 1:2/TiO2/CC structure carbon cloth electrode annealing in the atmosphere at 350 ℃, the specific capacitance value can reach 690.89 F/g, which is an increase of 59.3% and has excellent electrochemical performance. The subsequent desalination test was performed, and the experimental results were measured under 5 mm spacing, 1.2 V voltage, and 5 mM NaCl electrolyte concentration. Using the best parameter 1:2/TiO2/CC annealing temperature of 350℃, the conductivity of desalination test decreased from 639µS to 493µS, and the desalination efficiency was 22.8%. Finally, we did 30 repeated adsorption and desorption tests. The experiment results used pure carbon cloth and the best parameter 1:2/TiO2/CC annealing at 350℃ as the control group. The desalination efficiency increased from 5.1% to 14.6%, an increase of 65.0%.

摘要 I
Abstract II
致謝 IV
目錄 V
表目錄 VIII
圖目錄 IX
第一章 諸論 1
第一節 研究背景 ….1
壹、傳統脫鹽淡化處理技術 2
貳、電容去離子技術原理 3
參、電容去離子流動方式 4
肆、電容去離子多孔碳材料介紹 5
第二節 研究動機 7
第二章 文獻回顧 9
第一節 不同孔徑微孔碳球應用於CDI影響 9
第二節 不同流動方向之CDI脫鹽影響 11
第三節 不同碳材料特性對於CDI性能影響 12
第三章 研究方法及實驗步驟 14
第一節 實驗步驟-合成方法 14
壹、LPD-TiO2製備TiO2/CC 14
貳、水熱法合成Co3O4-NiO製備Co3O4-NiO/TiO2/CC 15
參、電容去離子Flow-by治具設計 17
第二節 材料分析檢測 18
壹、表面形貌分析 18
貳、X-ray光電子能譜分析 19
參、拉曼光譜儀 19
肆、傅立葉轉換顯微紅外線光譜儀 20
第一節 薄膜特性分析 21
壹、四點碳針量測 21
貳、水接觸角測試 22
第四節 電化學分析 23
壹、循環伏安法 23
貳、定電流充放電 23
參、電化學阻抗譜 24
肆、Co3O4-NiO/TiO2/CC電化學分析檢測 25
第四章 結果與討論 26
第一節 LPD-TiO2反應過程 26
壹、不同濃度H3BO4製備TiO2薄膜之沉積速率 26
貳、不同濃度硼酸製備TiO2/CC電極電化學測試 29
參、0.3 M硼酸製備不同厚度TiO2/CC電極水接觸角測試 31
肆、0.3 M 硼酸製備不同厚度TiO2/CC電極電化學測試 33
第二節 TiO2/CC利用水熱製備成Co3O4-NiO 35
壹、利用不同比例合成Co3O4-NiO 36
貳、不同比例Co3O4-NiO電化學測試 36
參、不同比例Co3O4-NiO之SEM表面形貌 38
肆、不同比例Co3O4-NiO/TiO2/CC之拉曼光譜測試 40
伍、不同比例Co3O4-NiO之EDS元素分析 41
陸、不同比例Co3O4-NiO粉末之XRD晶相分析 42
柒、不同比例Co3O4-NiO/TiO2/CC之GCD測試 43
捌、不同電極結構電化學性能測試 45
玖、最佳參數RNi/Co=2.67/TiO2/CC不同掃描速率CV測試 47
第三節 Co3O4-NiO/TiO2/CC經由退火後變化 48
壹、最佳參數(RNi/Co=2.67/TiO2/CC)經過退火後電化學量測 48
貳、不同比例Co3O4-NiO經過退火後SEM表面形貌 50
參、RNi/Co=2.67之Co3O4-NiO不同比例Co3O4-NiO經過退火後EDS元素分析 51
肆、不同比例Co3O4-NiO經過不同退火溫度後拉曼光譜分析 52
伍、最佳參數Co3O4-NiO粉末經過不同退火溫度FTIR分析 53
陸、RNi/Co=2.67/TiO2/CC經過不同退火溫度GCD衰退測試 54
柒、RNi/Co=2.17/TiO2/CC退火溫度350℃不同掃描速率CV測試 55
第四節 脫鹽效率 57
壹、RNi/Co=2.17/TiO2/CC退火350℃不同間距脫鹽效率 57
貳、RNi/Co=2.17/TiO2/CC退火350℃不同濃度NaCl脫鹽效率 58
參、RNi/Co=2.17/TiO2/CC退火350℃不同電壓脫鹽效率 59
肆、不同結構電極反覆吸脫附試驗 60
第五章 結論 67
參考文獻 69

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