微波輔助合成氧化釕/石墨烯奈米複合材料及其電容效能研究

Microwave-assisted synthesis and capacitive performance of RuO2/graphene nanocomposites

王亦凡(Yi-Fan Wang)

指導教授 ： 廖建勛

元智大學/工程學院/化學工程與材料科學學系/碩士(2011年)

摘要

本研究使用Hummer方法製備氧化石墨烯(GO)，使用微波輔助方法合成二氧化釕(RuO2)奈米微粒於氧化石墨烯的表面，再以鍛燒處理得到不含水結晶態與含水非結晶態之GO/RuO2複合材料。另外以4– aminoazobenzene-4’-sulfonic acid 改質 GO 得到f-GO/RuO2，於GO基面或邊緣導入偶氮苯磺酸基團和磺酸根,以增加氧化石墨烯的層間距離及水溶液分散性。使用XRD 、SEM 、TEM 、Raman、FTIR等儀器分析這些複合材料的型態結構特性，再將所製備材料組裝成半電極，並分析其電化學之性質。在電化學分析中，非含水結晶之GO/RuO2在電流密度0.1A/g下，以300℃鍛燒者其比電容可達 461 F/g，含水非結晶之GO/RuO2，以150℃鍛燒者其比電容可達1244 F/g，f-GO/RuO2之最高比電容可達1456 F/g，所以GO/RuO2為製備超級電容器的良好材料。

關鍵字

氧化石墨烯 ； 氧化釕 ； 超級電容器 ； 電化學

並列摘要

In this study, we modify the Hummer method to prepare graphene oxide (GO). Using microwave-assisted synthesis to deposit RuO2 nanoparticles directly on the surface of GO. In order to enlarge the interlayer distance and enhance the aqueous dispersion of GO, p-phenyl-SO3H or sulfonic groups (–SO3-) are introduced into the basal and/or edge planes of GO using 4– aminoazobenzene-4’-sulfonic acid to obtain f-GO/RuO2. The features of texture, morphology, and structure properties of prepared GO/RuO2 are analyzed by XRD, SEM, TEM, FTIR and Raman and other instrumental analysis. The GO/RuO2 composites are assembled as the electrode for electrochemical measurements by cyclic voltammetry and galvanostatic charging–discharging under current density of 0.1 A/g. The highest specific capacitance of 461 F/g for anhydrous crystalline GO/RuO2, 1244 F/g for hydrous amorphous GO/RuO2, and 1456 F/g for f-GO/RuO2 are obtained. Therefore, GO/RuO2 nanocomposites have a positive synergistic effect and potential for the applications of supercapacitors.

並列關鍵字

Graphene oxide ； Ruthenium oxide ； Supercapacitors ； Electrochemical

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