孔状Co_3O_4纳米片和纳米棒的选择性合成和表征(英文)

Selective Synthesis and Characterization of Porous Co_3O_4 Nanoplates and Nanorods

利用两步实验选择性合成孔状Co3O4纳米片和纳米棒:首先,以Co(NO3)2·6H2O,NaOH和不同量的NH4F为原料在120℃水热6h的条件下合成了Co(OH)2-Co3O4纳米片(S1)和Co(OH)F-Co3O4纳米棒(S2);然后将所得纳米片和纳米棒在400℃时加热2h即得到多孔的Co3O4纳米片和纳米棒。所得产物用X射线衍射(XRD)、场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)进行了表征。此外电化学测试表明Co3O4纳米棒的电容量比Co3O4纳米片的更大。

A two-step method has been proposed for the selective synthesis of porous Co3O4 nanoplates and nanorods：firstly,Co（OH）2-Co3O4 nanoplates （S1） and Co（OH）F-Co3O4 nanorods （S2） were synthesized via the hydrothermal reaction of Co（NO3）2·6H2O,NaOH and different amounts of NH4F at 120 ℃ for 6 h; secondly,porous Co3O4 nanoplates and nanorods were obtained by thermal decomposition of the S1 and S2 precursors in air at 400 ℃ for 2 h,respectively. The obtained products were characterized by X-ray diffraction,field emission scanning electron microscopy,and transmission electron microscopy. Besides,the electrochemical tests showed that the as-prepared Co3O4 nanorods have larger specific capacitances than the as-prepared Co3O4 nanoplates.