高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (8): 1303-1308.doi: 10.7503/cjcu20170122

• 研究论文: 无机化学 • 上一篇    下一篇

基于ZIFs合成的中空双金属(Zn,Co)S纳米晶及其赝电容性质研究

成巍, 陈彩玲, 于影, 李春光, 高路, 施展   

  1. 吉林大学无机合成与制备化学国家重点实验室, 化学学院, 长春 130012
  • 收稿日期:2017-02-28 修回日期:2017-06-16 出版日期:2017-08-10 发布日期:2017-06-16
  • 通讯作者: 高路,女,博士,副教授,主要从事无机-有机杂化材料研究.E-mail:gaolu@jlu.edu.cn E-mail:gaolu@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:21371069)资助.

Facile Synthesis of ZIFs-derived Hollow Bimetal (Zn,Co)S Nanocrystals for Supercapacitors

CHENG Wei, CHEN Cailing, YU Ying, LI Chunguang, GAO Lu, SHI Zhan   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2017-02-28 Revised:2017-06-16 Online:2017-08-10 Published:2017-06-16
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21371069).

摘要:

通过两步法设计合成了具有中空结构的双金属硫化物(Zn,Co)S纳米晶,并研究了其电化学性质.首先在室温下,以水为溶剂,十六烷基三甲基溴化铵为表面活性剂,利用Zn2+,Co2+与2-甲基咪唑的配位作用形成了ZIF-Zn,Co.然后以ZIF-Zn,Co为自牺牲模板剂,加入硫代乙酰胺,在微波辐射下快速合成了具有中空结构的(Zn,Co)S纳米晶.电化学测试结果表明,在电流密度为3 mA/cm2时,(Zn,Co)S纳米晶比电容为423.3 F/g,在电流密度为10 mA/cm2时,充放电2000次,仍能保持59%的初始电容.所制备的中空纳米结构具有较高的比表面积和较好的电化学性能,可作为超级电容器的电极材料.

关键词: 沸石咪唑酯骨架材料, 双金属, 空心纳米结构, 硫化物, 超级电容器

Abstract:

A simple two-step method was introduced to synthesize uniform and hollow (Zn,Co)S nanostructures. Firstly, the bimetal compound ZIF-Zn,Co(ZIF=zeolitic imidazolate frameworks) with metal ions(Zn2+ and Co2+) and ligand(2-methylimidazole) was obtained using deionized water as solvent, hexadecyltrimethylammonium bromide(CTAB) as capping agent under stirring at room temperature. Secondy, hollow (Zn,Co)S nanostructures were synthesized by selecting ZIF-Zn,Co as self-sacrificial template and adding thioacetamide(TAA) as sulfate source under the microwave-assisted heating condition. The electrochemical measurements show that the specific capacitance of the as-made hollow (Zn,Co)S nanostructures was 423.3 F/g at current density of 3 mA/cm2 and 57% capacitance remains after 2000 cycles at a current density of 10 mA/cm2. With the advantages of unique properties, such as high surface area and good electrochemical performance, the as-made hollow (Zn,Co)S nanostructures have great potential as electrode material for supercapacitors.

Key words: Zeolitic imidazolate frameworks(ZIFs), Bimetal, Hollow nanostructure, Sulfide, Supercapacitor

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