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奈米孔洞材料 微小化的反應器

奈米孔洞材料 微小化的反應器. 國立成功大學化學工程系 鄧熙聖 ( 教授 ) 、粘耀仁、戴佑理、鄭焙哲、 蔡忠憲、劉信佑、劉啟徵 Nanoporous Materials  Miniaturized Reactors National Cheng Kung University Department of Chemical Engineering. 米孔洞碳 規則性奈. 量化 製備. 高分子充填 成膜. MCM 系列 孔洞氧化矽. 孔洞材料分析與製備技術. 觸媒反應之 Carbon/metal redox center. 孔洞材料電化學儲能機制.

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奈米孔洞材料 微小化的反應器

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  1. 奈米孔洞材料 微小化的反應器 國立成功大學化學工程系 鄧熙聖(教授)、粘耀仁、戴佑理、鄭焙哲、 蔡忠憲、劉信佑、劉啟徵 Nanoporous Materials  Miniaturized Reactors National Cheng Kung University Department of Chemical Engineering 多功能碳材料研究室

  2. 米孔洞碳 規則性奈 量化 製備 高分子充填 成膜 MCM系列 孔洞氧化矽 孔洞材料分析與製備技術 觸媒反應之 Carbon/metal redox center 孔洞材料電化學儲能機制 交流阻抗分析 超電容電極 孔洞碳材製備 • > 3000 m2/g • 孔洞形成機制 孔洞結構結合 吸附能預測吸附量 Gas-carbon 反應之機制 孔徑分佈 吸附量 predict 電極陣列 化學鍍 成膜 感測器 鎳氫電池 孔洞高分子薄膜 電極 多功能碳材料研究室

  3. Application of Porous Carbon in Supercapacitors (Electrochemical Capacitors) a. Gasification Raw Material char Porous Carbon b. Chemical impregnation Raw Material slurry Porous carbon c. Etching Raw Material partially etched Porous carbon in N2 in H2O or CO2 carbonization gasification (activation) leaching mixing in N2 HCl ZnCl2 or H3PO4 leaching mixing HCl alkali in N2 多功能碳材料研究室

  4. Electrochemical Capacitors Have High Power Density and Energy Capacity R. Kötz, M. Carlen, Electrochimica Acta 45 (2000) 2483–2498 多功能碳材料研究室

  5. Principle of Energy Storage • Conventional capacitors 多功能碳材料研究室

  6. Double Layer Capacitor • The larger area the electrodes can provide, the more energy can be stored. • Carbon can be made with high surface area and porosity. d = 5 – 10 Å 多功能碳材料研究室

  7. Conventional Capacitors • Double Layer Capacitors (small d of double Layer) + (porous electrode) Very high capacitance e.g. S.A. = 1000 m2/g for porous carbon double-layer capacitance = 10 μF/cm2 100 F/g for capacitors with carbon electrodes; more than 1000 times higher than conventional capacitors. 多功能碳材料研究室

  8. Principle of Operation 多功能碳材料研究室

  9. 超高電容目前的應用 a. 消費性電子產品的電力支援系統(backup source) • 電視機記憶保護裝置 • 汽車音響 • 鬧鐘、程序控制器 • 相機及攝影機 • 全球行動通訊系統(global system for mobile communication, GSM): 每5 ms有0.5 ms的pulse power。EC可增加電池壽命。 • 不斷電系統 • 筆記型電腦、 行動電話 • 電動玩具、電動牙刷、電動刮鬍刀 多功能碳材料研究室

  10. b. 各種機械、引擎的啟動器, 尤其寒冬下可取代電池。 c. 交通號幟的電力供應 d. 電動汽/機車 以上應用均是利用其瞬間高放電、 快充電、可靠性高及壽命長等特點。 多功能碳材料研究室

  11. Template Synthesis Method - Principle and Application 多功能碳材料研究室

  12. Preparation of Ordered Mesoporous Carbon and Applications • Mesoporous silica, like MCM48, SBA15…, etc,has been used to synthesis ordered mesoporous carbon in recent years. • Compare with traditional active carbon, mesoporous carbon not only reserves high specific surface (ca. 1500 cm2/g), but also has uniform pore size and regular nanostructure. • It can be used as catalytic supports, electrode materials, … etc. 多功能碳材料研究室

  13. Synthesis mixed by ultrasonic oscillator Carbonized in the burner at 900C under N2 Template Carbon precursor Washed with D.I. water till pH value under 8 and dry Etch template by 1M NaOH at 50 C Analyzed by BET,TEM,EA …,etc 多功能碳材料研究室

  14. Mechanism pore wall pore mixed with carbon precursor template template/precursor composite etched by NaOH template/carbon composite mesoporous carbon carbonization 多功能碳材料研究室

  15. TEM image and SBET Mesoporous carbon MCM48 SBET = 1784 cm2/g 多功能碳材料研究室

  16. Applications • Anodic catalyst support for direct methanol fuel cell (DMFC). • Electrochemical double layer capacitor. • Separation and purification technology. 多功能碳材料研究室

  17. Materials • (a) Track etch membranes : • (b) Porous alumina membranes track-etched PC membrane Ion beam polymer Porous membrane Pore diameter = 0.2 m Anodic Alumina Oxide membrane Pore diameter = 5 nm 多功能碳材料研究室

  18. Experimental (a) cross-section of raw membrane (b) Sn2+ coated template membrane (c) electroless deposition of Ni-P (d) dissolution of the template membrane. 多功能碳材料研究室

  19. Characterization of As-deposited Ni-P Films -1 SEM images of Ni-P electrode arrays 多功能碳材料研究室

  20. Characterization of As-deposited Ni-P Films -2 Ni(OH)2 + OH- -> NiOOH + H2O + e- NiOOH + H2O + e- -> Ni(OH)2 + OH- 多功能碳材料研究室

  21. Preparation of Nanotube-shaped TiO2 and Applications • Since the discovery of carbon nanotubes in 1991 by Iijima, much research has been conducted on nanoscale tubular materials with novel properties • TiO2 is wide application in pigments, catalyst supports, fillers, coating, photoconductors, dielectric materials and so on. • TiO2 has good characteristics of chemical stability, endurance, thin film transparency and lower production costs. 多功能碳材料研究室

  22. Hydrothermal Method TiO2 powders Heat in autoclave NaOH(aq) Wash with HCl(aq) and D.I. water ultrasonic Analysis with XRD、 TEM、BET…etc. Filtering and Drying 多功能碳材料研究室

  23. TEM Images 多功能碳材料研究室

  24. Nitrogen Adsorption 多功能碳材料研究室

  25. Mechanism Raw material treates with NaOH(aq), some of the Ti-O-Ti bonds are broken, and Ti-O-Na and Ti-OH bonds are formed. 2. Treated with HCl (aq) and distilled water, the Ti-O-Na and Ti-OH bonds react with acid and water to form new Ti-O-Ti bonds. 3. More HCl(aq) treatment 多功能碳材料研究室

  26. Applications • Large surface area offer a highly active photo-catalytic material for many applications. • High efficient dye-sensitized solar cell. • Provide a functional catalyst for chemical reaction, and an adsorbents for chemicals. • Environmental purification. • Generation of hydrogen gas. 多功能碳材料研究室

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