【摘要】 空心MOFs及其衍生物因其高比表面积和完美的框架结构而受到越来越多的关注,这些特性决定了MOFs材料在储能和催化领域具有极大的应用潜力.然而,目前很少有研究针对空心MOFs的壳层进行修饰,如对壳层表面进行介孔修饰,这将赋予MOFs衍生材料一些新的性能.本文以50 nm尺寸的二氧化硅纳米球为模板,通过配位聚合诱导自组装工艺成功地合成了具有介孔壳层的空心MOFs（MIL-53（Fe））.紧密修饰的介孔结构使空心MOFs的壳层非常薄,从而实现了从MOFs到空心Fe₃O₄/碳材料的转化.将空心Fe₃O₄/碳材料作为阳极活性材料用于锂离子电池,该材料表现出优异的电化学性能.即使在0.1 A/g电流密度条件下循环200次,电容量仍可保持在1270 mA h/g.本研究为能源领域多功能化MOFs及其衍生物的设计和制备提供了新的思路.更多还原

【Abstract】 Hollow metal-organic frameworks（MOFs） and their derivatives have attracted more and more attention due to their high specific surface area and perfect morphological structure,which determine their large potential application in energy storage and catalysis fields.However,few researchers have carried out further modification on the outer shell of hollow MOFs,such as the perforation modification,which will endow hollow nanomaterials derived from MOFs with multifunctionality.In this paper,hollow MOFs of MIL-53（Fe） with perforated outer surface are successfully synthesized by using SiO₂ nanospheres as the template via a self-assembly process induced by the coordination polymerization.The tightly packed mesopore structure makes the carbon outer shell of MOFs thinner,thus realizing the in-situ transformation from MOFs to hollow Fe₃ O₄/carbon,which exhibits perfect capacity approaching 1270 mA h g^-1 even after 200 cycles at 0.1 A g^-1,as an anode material in lithium ion batteries（LIBs） application.This research provides a new strategy for the design and preparation of MOFs and their derivatives with multifunctionality for the energy applications.更多还原