CAJ | 학술논문

通过微波固相剥离氧化石墨制备了功能化石墨烯材料.石墨烯的剥离,是由于微波加热过程中氧化石墨烯片上的官能团分解为CO2和H2O,产生的压力超过了片层间的范德华力.形貌表征显示了石墨烯的有效剥离和纳米孔结构的形成.红外光谱分析结果表明微波剥离的功能化石墨烯仍然有少量的官能团残留.N2等温吸附-脱附测试结果表明样品具有高比表面积(412.9 m2·g-1)和大孔容(1.91 cm3·g-1).电化学测试结果表明功能化石墨烯具有良好的电化学电容行为和207.5 F·g-1的比电容.
통과미파고상박리양화석묵제비료공능화석묵희재료.석묵희적박리,시유우미파가열과정중양화석묵희편상적관능단분해위CO2화H2O,산생적압력초과료편층간적범덕화력.형모표정현시료석묵희적유효박리화납미공결구적형성.홍외광보분석결과표명미파박리적공능화석묵희잉연유소량적관능단잔류.N2등온흡부-탈부측시결과표명양품구유고비표면적(412.9 m2·g-1)화대공용(1.91 cm3·g-1).전화학측시결과표명공능화석묵희구유량호적전화학전용행위화207.5 F·g-1적비전용.
Functionalized graphene sheets were produced by microwave-induced exfoliation of graphene oxide. Exfoliation happens when the oxygen-containing groups decomposed into CO2 and H2O by microwave-heat, thus yielding pressures that exceed the Van der Waals attraction between the layers. X-ray diffraction, FTIR, SEM, TEM and nitrogen adsorption-desorption were used to characterize the samples. Scanning electron microscopy images show that the sample possesses nanoporous structures. Fourier-transform infrared spectroscopy characterization proves the existence of a few functional groups on the surface of graphene sheets. The results of nitrogen adsorption-desorption analysis indicate that the sample has high BET surface area (412.9 m2·g-1) and large pore volume (1.91 cm3·g-1). The electrochemical tests show that the sample has good electrochemical capacitive behavior and high specific capacitance values about 207.5 F·g-1 in aqueous KOH.