介孔Co_3O_4多面体的制备及电化学性能
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摘要
通过水热处理Co(NO_3)_2与(NH_4)_2S_2O_8合成了CoOOH多面体,再经高温煅烧得到具有介孔结构的Co_3O_4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N_2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(NH_4)_2S_2O_8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Co_3O_4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.
CoOOH polyhedra was synthesized via hydrothermal treatment of Co( NO_3)_2 and( NH_4)_2S_2O_8,which was then transformed into meso-porous Co_3O_4 polyhedra via thermal 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 N_2 adsorption-desorption. The influence of reaction time,reaction temperature and( NH_4)_2S_2O_8 concentration 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 Co_3O_4 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~(-1) and a detection limit of 1 μmol/L.
CoOOH polyhedra was synthesized via hydrothermal treatment of Co( NO_3)_2 and( NH_4)_2S_2O_8,which was then transformed into meso-porous Co_3O_4 polyhedra via thermal 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 N_2 adsorption-desorption. The influence of reaction time,reaction temperature and( NH_4)_2S_2O_8 concentration 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 Co_3O_4 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~(-1) and a detection limit of 1 μmol/L.
引文
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