School of Chemistry and Molecular Engineering, East China Normal University , 500 N. Dongchuan Road, Shanghai 200241, P. R. China.
ACS Appl Mater Interfaces. 2017 Oct 11;9(40):35209-35217. doi: 10.1021/acsami.7b08657. Epub 2017 Sep 29.
Hollow microporous organic nanospheres (H-MONs) are prepared by using polylactide-b-polystyrene diblock copolymers (PLA-b-PS) as the precursor via a hyper-cross-linking mediated self-assembly strategy, in which the hyper-cross-linking PS block forms the microporous organic shell framework, and the degradable PLA block produces the hollow mesoporous core structure. The formation mechanism, morphology, and porosity parameters of the resulting H-MONs are systematically investigated. Moreover, based on the hyper-cross-linking generated rigid microporous organic frameworks, hollow microporous carbon nanospheres (H-MCNs) can be achieved by further pyrolysis progress. The obtained H-MCNs as electrode materials of a supercapacitor exhibit excellent electrochemical performance with specific capacitances of up to 145 F g at 0.2 A g, with almost no capacitance loss even after 5000 cycles at 10 A g. More especially, H-MONs can be further act as "nanoreactors" for the synthesis of FeO nanoparticles within hollow cores to construct magnetic core-shell FeO@H-MONs nanocomposite materials. Our strategy represents a new avenue for the preparation of hollow morphology-controlled microporous organic polymers with various potential applications.
中空微孔有机纳米球（H-MONs）是通过超交联介导的自组装策略，以聚乳酸-嵌段-聚苯乙烯嵌段共聚物（PLA-b-PS）为前体制备的，其中超交联 PS 嵌段形成微孔有机壳框架，可降解的 PLA 嵌段产生中空介孔核结构。系统研究了所得 H-MONs 的形成机理、形态和孔隙率参数。此外，基于超交联生成的刚性微孔有机骨架，通过进一步的热解过程可以得到中空微孔碳纳米球（H-MCNs）。作为超级电容器的电极材料，所得到的 H-MCNs 表现出优异的电化学性能，在 0.2 A g 时的比电容高达 145 F g，即使在 10 A g 下循环 5000 次后，电容损失几乎可以忽略不计。更特别的是，H-MONs 可以进一步作为“纳米反应器”，在中空核内合成 FeO 纳米颗粒，构建磁性核壳 FeO@H-MONs 纳米复合材料。我们的策略为制备具有各种潜在应用的中空形貌控制的微孔有机聚合物提供了一条新途径。
