有机相化学镀铝法制备Al/石墨烯复合材料粉末

采用有机相化学镀法制备了Al/石墨烯复合材料粉末。使用傅里叶红外光谱仪、拉曼光谱仪、ASAP2020全自动快速比表面与孔隙度分析仪和配备EDS能谱的扫描电子显微镜表征样品。结果表明,镀铝后,石墨烯表面的含氧基团基本消失,发生空间弯曲折叠形成包覆结构,导致中孔和大孔的形成,石墨烯层间距变大。此外,氮气吸附-脱附结果显示,Al/石墨烯复合材料粉末的孔道以微孔和中孔为主,Brunauer-Emmett-Teller比表面积为91 m~2·g~(-1);通过Barret-Joyner-Halenda解吸模型计算得到的平均孔径为8.77 nm,孔体积为0.45 cm~3·g~(-1)。X射线衍射分析并没有发现Al_4C_3晶体结构的出现,表明镀铝过程并未或生成很少(小于检测下限)脆相Al_4C_3。最后,微观表面分析表明,当加入的NaH量略大于理论值时,实验结果与理想体系基本吻合,镀铝效果最佳。

Synthesis of Al/graphene Composite Powder by Organic Phase Electroless Aluminum Plating

Al/graphene composite powder was prepared by an organic phase electroless aluminum plating method. The samples were characterized by Fourier transform infrared spectrometry, Raman spectrometry, ASAP2020 automatic specific surface area and porosity analyzer, and scanning electron microscope equipped with an energy dispersive spectrometer (EDS). After electroless plating, the results showed that the oxygen-containing groups on the surface of graphene substantially decreased, and the cladding structure was formed by bending, which led to the formation of meso-and macropores; however, the spacing of the graphene layers was increased. In addition, the results of nitrogen adsorption showed that the pores of Al/graphene composite powder were dominated by micropores and mesopores, and the Brunauer-Emmett-Teller specific surface area was 91 m²·g^-1; the average pore diameter and the pore volume calculated by the Barret-Joyner-Halenda desorption model was 8.77 nm and 0.45 cm³·g^-1, respectively. The appearance of the crystal structure of Al₄C₃ was not found by X-ray diffraction analysis, indicating that the aluminum plating process did not produce or produce little (below the minimum limit of detection) brittle phase Al₄C₃. Finally, the microscopic surface analysis showed that when the amount of NaH added was slightly larger than the theoretical value, the experimental results were basically consistent with the ideal system, and the aluminum plating effect was the best.