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
Ni_(0.5)Co_(0.5)(OH)_2 nanosheets coated CuCo_2O_4 nanoneedles arrays were successfully designed and synthesized on carbon fabric. The core/shell nanoarchitectures directly served as the binder-free electrode with a s...Ni_(0.5)Co_(0.5)(OH)_2 nanosheets coated CuCo_2O_4 nanoneedles arrays were successfully designed and synthesized 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 Ag^(-1), manifesting their enormous potential in hybrid supercapacitor devices. The asassembled CuCo_2O_4@Ni_(0.5)Co_(0.5)(OH)_2//AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 Fg^(-1) at 1 Ag^(-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 Ag^(-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Ni_(0.5)Co_(0.5)(OH)_2 nanosheets coated CuCo_2O_4 nanoneedles arrays were successfully designed and synthesized 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 Ag^(-1), manifesting their enormous potential in hybrid supercapacitor devices. The asassembled CuCo_2O_4@Ni_(0.5)Co_(0.5)(OH)_2//AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 Fg^(-1) at 1 Ag^(-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 Ag^(-1)) and robust mechanical stability and flexibility, implying the huge potential of present hierarchical electrodes in energy storage devices.
