Cheng Cheng, Kong Dechen, Wei Chengzhen, Du Weimin, Zhao Jianbo, Feng Yeqin, Duan Qingling
Henan Province Key Laboratory of New Opto-Electronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000 Henan, P. R. China.
Dalton Trans. 2017 Apr 19;46(16):5406-5413. doi: 10.1039/c7dt00355b.
In this work, we have successfully developed a simple self-template route for preparation of hollow ellipsoid Ni-Mn sulfides. This route involves the synthesis of solid Ni-Mn ellipsoids via a chemical precipitation method. Then, using thioacetamide (TAA) as the sulfur source, the solid Ni-Mn ellipsoids can be easily converted to hollow ellipsoid Ni-Mn sulfides in ethanol via sulfidation reaction. The as-synthesized hollow ellipsoid Ni-Mn sulfides possess large specific surface areas and porous structures. Benefiting from these structural and compositional advantages, the electrochemical performance of the hollow ellipsoid Ni-Mn sulfides is studied. As expected, the hollow ellipsoid Ni-Mn sulfides show a high specific capacitance of 1636.8 F g at 2.0 A g and good cycling stability (only 4.9% loss after 4000 cycles) as electrode materials for supercapacitors. Furthermore, electrocatalytic oxidation of glucose based on the synthesized hollow ellipsoid Ni-Mn sulfides is also performed. The hollow ellipsoid Ni-Mn sulfides present high sensitivity and selectivity, good stability and a low detection limit (0.02 μM). In addition, the as-synthesized hollow ellipsoid Ni-Mn sulfides exhibit good ability to remove the Congo red dyes from water, which gives them potential application in water treatment. The current work makes a major contribution to the design and preparation of hollow metal sulfide structures, as well as their potential applications in supercapacitors, electrocatalytic oxidation of glucose and water treatment.
在这项工作中，我们成功开发了一种制备空心椭球形镍锰硫化物的简单自模板路线。该路线包括通过化学沉淀法合成实心镍锰椭球体。然后，以硫代乙酰胺（TAA）作为硫源，通过硫化反应可使实心镍锰椭球体在乙醇中轻松转化为空心椭球形镍锰硫化物。所合成的空心椭球形镍锰硫化物具有较大的比表面积和多孔结构。受益于这些结构和组成上的优势，对空心椭球形镍锰硫化物的电化学性能进行了研究。正如预期的那样，空心椭球形镍锰硫化物作为超级电容器的电极材料，在2.0 A g时显示出1636.8 F g的高比电容以及良好的循环稳定性（4000次循环后仅损失4.9%）。此外，还基于所合成的空心椭球形镍锰硫化物进行了葡萄糖的电催化氧化。空心椭球形镍锰硫化物具有高灵敏度和选择性、良好的稳定性以及低检测限（0.02 μM）。此外，所合成的空心椭球形镍锰硫化物表现出良好的从水中去除刚果红染料的能力，这使其在水处理方面具有潜在应用。当前的工作对空心金属硫化物结构的设计和制备及其在超级电容器、葡萄糖电催化氧化和水处理中的潜在应用做出了重要贡献。
