采用溶胶 -凝胶技术 ,在不同络合剂体系中制备 Cu Co2 O4 催化剂 ,用 XRD、BET法、TPR、二甲苯完全氧化等技术和手段研究了催化剂的晶相、还原性能及催化活性。结果表明加入络合剂对提高催化剂比表面积 ,降低晶粒尺寸至纳米量级有明显作...采用溶胶 -凝胶技术 ,在不同络合剂体系中制备 Cu Co2 O4 催化剂 ,用 XRD、BET法、TPR、二甲苯完全氧化等技术和手段研究了催化剂的晶相、还原性能及催化活性。结果表明加入络合剂对提高催化剂比表面积 ,降低晶粒尺寸至纳米量级有明显作用 ,对二甲苯的催化氧化表现出优良的反应活性。展开更多
为获得高性能葡萄糖传感器电极材料,采用溶剂热法,以Cu(NO_3)_2和Co(NO_3)_2为金属源,在丙三醇和异丙醇的混合溶剂体系中制备得到CuCo_2O_4前驱体,随后经过煅烧获得尖晶石结构CuCo_2O_4空心球材料。通过X射线粉末衍射(X-ray powder diff...为获得高性能葡萄糖传感器电极材料,采用溶剂热法,以Cu(NO_3)_2和Co(NO_3)_2为金属源,在丙三醇和异丙醇的混合溶剂体系中制备得到CuCo_2O_4前驱体,随后经过煅烧获得尖晶石结构CuCo_2O_4空心球材料。通过X射线粉末衍射(X-ray powder diffraction,XRD)、扫描电子显微镜(scanning electron microscopy,SEM)、透射电子显微镜(transmission electron microscopy,TEM)对样品的组成、结构及形貌进行了表征,证实所得样品为尖晶石结构CuCo_2O_4空心球材料,且球壳表面具有大量纳米颗粒堆积而成的孔道结构。基于该材料修饰的电极对葡萄糖的检测极限低至2.6nmol/L(S/N=3),灵敏度高达1 854.87μA·(mmol/L)^(-1)·cm^(-2),线性检测范围为0~750μmol/L,且具有良好的抗干扰性。展开更多
Ni0.5Co0.5（OH）2 nanosheets coated CuCo2O4 nanoneedles arrays were successfully designed and synthe- sized on carbon fabric. The core/shell nanoarchitectures directly served as the binder-free electrode with a superi...Ni0.5Co0.5（OH）2 nanosheets coated CuCo2O4 nanoneedles arrays were successfully designed and synthe- sized on carbon fabric. The core/shell nanoarchitectures directly served as the binder-free electrode with a superior capacity of 295.6 mAh g-1 at 1 Ag-1, which still maintained 220 mAh g-1 even at the high current density of 40 A g-l, manifesting their enormous potential in hybrid supercapacitor devices. The asassembled CuCo2O4@Ni0.5Co0.5（OH）2]]AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 F g 1 at 1 A g-1 and the high energy density of 32 Wh kg 1 at the power density of 800 Wkg-1. Furthermore, the as-assembled device also delivered excellent cycling performance （retaining 91.9% of the initial capacitance after 12,000 cycles at 8 A g 1） and robust mechanical stability and flexibility, implying the huge potential of present hierarchical electrodes in energy storage devices.展开更多
文摘为获得高性能葡萄糖传感器电极材料,采用溶剂热法,以Cu(NO_3)_2和Co(NO_3)_2为金属源,在丙三醇和异丙醇的混合溶剂体系中制备得到CuCo_2O_4前驱体,随后经过煅烧获得尖晶石结构CuCo_2O_4空心球材料。通过X射线粉末衍射(X-ray powder diffraction,XRD)、扫描电子显微镜(scanning electron microscopy,SEM)、透射电子显微镜(transmission electron microscopy,TEM)对样品的组成、结构及形貌进行了表征,证实所得样品为尖晶石结构CuCo_2O_4空心球材料,且球壳表面具有大量纳米颗粒堆积而成的孔道结构。基于该材料修饰的电极对葡萄糖的检测极限低至2.6nmol/L(S/N=3),灵敏度高达1 854.87μA·(mmol/L)^(-1)·cm^(-2),线性检测范围为0~750μmol/L,且具有良好的抗干扰性。
基金supported by the National Natural Science Foundation of China (51672109,21505050)Natural Science Foundation of Shandong Province for Excellent Young Scholars (ZR2016JL015)+2 种基金the National Basic Research Program of China (2015CB932600)the Program for Huazhong University of Science and Technology (HUST) Interdisplinary Innovation Team (2015ZDTD038)the Fundamental Research Funds for the Central University
文摘Ni0.5Co0.5（OH）2 nanosheets coated CuCo2O4 nanoneedles arrays were successfully designed and synthe- sized on carbon fabric. The core/shell nanoarchitectures directly served as the binder-free electrode with a superior capacity of 295.6 mAh g-1 at 1 Ag-1, which still maintained 220 mAh g-1 even at the high current density of 40 A g-l, manifesting their enormous potential in hybrid supercapacitor devices. The asassembled CuCo2O4@Ni0.5Co0.5（OH）2]]AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 F g 1 at 1 A g-1 and the high energy density of 32 Wh kg 1 at the power density of 800 Wkg-1. Furthermore, the as-assembled device also delivered excellent cycling performance （retaining 91.9% of the initial capacitance after 12,000 cycles at 8 A g 1） and robust mechanical stability and flexibility, implying the huge potential of present hierarchical electrodes in energy storage devices.
