A facile soft-template synthesis of mesoporous polymeric and carbonaceous nanospheres
A facile soft-template synthesis of mesoporous polymeric and carbonaceous nanospheres
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DOI：
10.1038/ncomms3798
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发表时间：
2013-12-01
影响因子：
16.6
通讯作者：
Qiao, Shi Zhang
中科院分区：
文献类型：
--
作者：
Liu, Jian;Yang, Tianyu;Qiao, Shi Zhang
由于前驱体组分的自组装能力较弱，水热过程中相邻纳米球之间的严重交联，合成直径小于500 nm的单分散介孔聚合物纳米球仍然是一个巨大的挑战。本文对介孔二氧化硅纳米球的合成方法进行了扩展，使之能够制备出粒径为80~400 nm、中孔直径接近3.5 nm的有序介孔间苯二酚甲醛纳米球。通过微调合成参数，可以成功地合成多层介孔间苯二酚甲醛中空纳米球。通过对聚合物球进行碳化处理，进一步得到了具有高比表面积的介孔碳纳米球和中空纳米球。由此得到的介孔碳纳米球被证明是锂硫电池的主体正极材料。该合成策略为制备具有潜在储能和转换应用潜力的多孔碳纳米球提供了基准。
Owing to the weak self-assembly ability of precursor components and the serious cross-linking of neighbouring nanospheres during a hydrothermal process, the synthesis of monodisperse mesoporous polymer nanospheres with diameters below 500 nm remains a great challenge. Here we extend the synthesis method of mesoporous silica nanospheres to enable the preparation of ordered mesoporous resorcinol formaldehyde nanospheres with particle size from 80 to 400 nm and mesopores of similar to 3.5 nm in diameter. By finely tuning the synthesis parameters, multi-layered mesoporous resorcinol formaldehyde hollow nanospheres can be successfully synthesized. Mesoporous carbon nanospheres and hollow nanospheres with high surface area are further obtained through carbonization of the polymer spheres. The resulting mesoporous carbon nanospheres are demonstrated as the host cathode material for lithium-sulphur batteries. The synthesis strategy provides a benchmark for fabricating well-defined porous carbonaceous nanospheres with potential for energy storage and conversion applications.