Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/11398
標題: 樹枝狀高分子/奈米碳管複合材料上成長白金奈米顆粒之製備與特性研究
Preparation and characterization of dendrimer/carbon nanotube nanocomposites supporting platinum nanoparticle
作者: 唐鳴遠
Tang, Ming-Yuan
關鍵字: 樹枝狀高分子
dendrimer
奈米碳管
白金顆粒
nanocarbontube
platinum nanoparticle
出版社: 材料科學與工程學系所
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摘要: 本研究藉由硝酸迴流之方式來進行少壁奈米碳管改質,解決少壁奈米碳管本身易自身凝聚、溶解度不佳等缺點,再結合樹枝狀高分子來對少壁奈米碳管進行接枝修飾,製備出新型高分子奈米複合材料。並以微波製程將白金奈米顆粒還原於奈米複合材料上,探討其電催化活性,以至於觸媒或感測器元件的設計與應用。 本研究首先以硝酸加熱迴流來改質少壁奈米碳管於不同處理時間下,經由熱重分析儀、拉曼光譜儀分析結果得知少壁奈米管表面羧化程度隨著處理時間的增加有漸增的趨勢,而在處理時間60分鐘下即可得到良好之改質程度,並有效提升其溶液中之分散性。另一方面,當少壁奈米碳管表面接枝上不同代數之樹枝狀高分子後,由穿透式電子顯微鏡來觀察可發現隨著樹枝狀高分子之代數提升,奈米碳管的管壁將有增厚的趨勢,並可進一步賦予奈米碳管更佳的溶解度。最後,以乙二醇為溶劑經微波加熱反應來還原白金奈米顆粒,二代數樹枝狀高分子/少壁奈米碳管所成長的白金顆粒大小約為3.27nm,而三代數和四代數樹枝狀高分子/少壁奈米碳管所成長的白金顆粒尺寸則明顯變小分別為2.02nm和2.2nm,且可得到均勻分布和尺寸均一的白金奈米顆粒。並以循環伏安法來對其作電催化活性分析,結果顯示四代數樹枝狀高分子/少壁奈米碳管所成長之白金奈米顆粒獲得最佳之電化學活性。
The goal of this is to design and develop new multi-functional composites. Surface modification of carbon nanotube (CNT) using the chemically modified method was then grafted by different generation PAMAM dendrimer ,which was covalently attached onto the surface of CNTs. Surface treated CNTs by grafting carboxylic acid is prepared to improve the solubility of CNTs. The results of Raman and TGA revealed the degree of carboxylation increased on the surface of CNTs with increasing the treated time and reached the well modified surface after 60 min treatment. Use microwave heating to reduce the Pt nanoparticles on CNTs surface with 100 W . The Pt nanoparticles size on dendrimer-CNT composites (generation2 、3and4) is about 3.27 nm、2.02 nm and 2.2nm and available to get the Pt particles with uniform distribution and uniform size. Then, investigating the electrochemical properties in 2M CH3OH + 1M H2SO4 aqueous solutions by a cyclic voltammetry method. The results showed that the G4 Pt-DEN-CNT had high electrocatalytic activity.
URI: http://hdl.handle.net/11455/11398
其他識別: U0005-2108201216241500
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-2108201216241500
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