用于高效去除水中孔雀石绿的三层结构磁性复合材料Fe3O4@聚丙烯酸@ZiF-8的制备
徐鹏, 王莎莎, 陈难难, 王澳, 于冬妹
【无机化学学报】doi: 10.11862/CJIC.20230239
设计并合成了一种以磁性纳米粒子为核,聚合物为中间层,金属有机骨架材料为外层的三层结构磁性复合材料(Fe3O4@PAA@ZIF-8)。首先利用溶剂热法制备Fe3O4纳米粒子,然后通过蒸馏沉淀聚合法在Fe3O4纳米粒子表面包覆聚丙烯酸(PAA)层,最后通过原位沉积法在PAA外部包覆ZIF-8。在对Fe3O4@PAA@ZIF-8的组成和结构进行表征的基础上,深入研究其对孔雀石绿(MG)的吸附性能。透射电子显微镜(TEM)显示Fe3O4@PAA@ZIF-8具有明显的三层结构,Fe3O4的平均粒径为117 nm,PAA层厚度约为17 nm,ZIF-8层的厚度约为14 nm。Fe3O4@PAA@ZIF-8对MG的吸附量随着pH的升高而增大,吸附过程符合准二阶动力学模型和Langmuir等温吸附模型。此外,Fe3O4@PAA@ZIF-8还表现出良好的重复利用性能,8次循环利用后对MG (500 mg·L-1)的最大吸附量仍可达982 mg·g-1
关键词: Fe3O4, 沸石咪唑酯骨架材料, 吸附, 孔雀石绿
Crystalline and amorphous metal sulfide composite electrode materials with long cycle life: Preparation and performance of hybrid capacitors
Ning DING, Siyu WANG, Shihua YU, Pengcheng XU, Dandan HAN, Dexin SHI, Chao ZHANG
【无机化学学报】doi: 10.11862/CJIC.20240146
Crystalline@amorphous NiCo2S4@MoS2 (v-NCS@MS) nanostructures were designed and constructed via an ethylene glycol-induced strategy with hydrothermal synthesis and solvothermal method, which simultaneously realized the defect regulation of crystal NiCo2S4 in the core. Taking advantage of the flexible protection of an amor-phous shell and the high capacity of a conductive core with defects, the v-NCS@MS electrode exhibited high specific capacity (1 034 mAh·g-1 at 1 A·g-1) and outstanding rate capability. Moreover, a hybrid supercapacitor was assembled with v-NCS@MS as cathode and activated carbon (AC) as anode, which can achieve remarkably high specific energy of 111 Wh·kg-1 at a specific power of 219 W·kg-1 and outstanding capacity retention of 80.5% after 15 000 cycling at different current densities.
关键词: crystalline@amorphous heterostructure, NiCo2S4@MoS2, hybrid supercapacitor, defect design, long cycle life

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