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Zn^(2+),Co^(2+)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/cm^2时,(Zn,Co)S纳米晶比电容为423.3 F/g,在电流密度为10 mA/cm^2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.
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（ gn^2＋ and Co^2＋） and ligand（2-methylimidazole） was obtained using deionized water as solvent, hexadeeyhrimethyl- ammonium 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-saerificial template and adding thioacetamide （TAA） as sulfate source under the mierowave-assisted heating condition. The electrochemical measurements show that the speeific capaeitanee of the as-made hollow （Zn, Co）S nanostructures was 423.3 F/g at current density of 3 mA/cm^2 and 57% capacitanee remains after 2000 cycles at a current density of 10 mA/cm^2. With the advantages of unique properties, such as high surface area and good eleetrochemical performance, the as-made hollow （Zn, Co）S nanostruetures have great potential as eleetrode material for supereapaeitors.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第8期1303-1308,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21371069)资助~~
