介孔Co3O4多面体的制备及电化学性能

通过水热处理Co(NO3)2与(NH4)2S2O8合成了CoOOH多面体,再经高温煅烧得到具有介孔结构的Co3O4多面体;利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)和N2吸附-脱附实验等手段对其结构和组成进行了表征;研究了反应时间、反应温度及(NH4)2S2O8浓度等因素对CoOOH多面体形貌的影响,分析了CoOOH多面体的形成机理.性能测试结果表明,该介孔Co3O4多面体具有良好的葡萄糖电化学检测活性,检测线性范围为0. 05~1.8 mmol/L,响应灵敏度为148μA·cm-2·mmol·L-1,检出限为1μmol/L.

Synthesis of Meso-porous Co3O4 Polyhedra and Their Electrochemical Properties

CoOOH polyhedra was synthesized viahydrothermal treatment of Co(NO₃)₂ and (NH₄)₂S₂O₈, which was then transformed into meso-porous Co₃O₄ polyhedra viathermal annealing. The structure and composition of materials were characterized by means of scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and N₂ adsorption-desorption. The influence of reaction time, reaction temperature and (NH₄)₂S₂O₈concentration on the morphology of CoOOH polyhedra were investigated and the possible formation mechanism of CoOOH polyhedra was also analyzed. With respect to non-enzyme glucose sensing, the present Co₃O₄ polyhedra exhibited a linear detection range from 0.05 mmol/L to 1.8 mmol/L, a sensitivity of 148 μA·cm^-2·mmol·L^-1and a detection limit of 1 μmol/L.