每周分享：A solid with a hierarchical tetramodal micro-meso-macro pore size distribution

麦克默瑞提克(上海）仪器有限公司

2014/04/08 10:52

今天给大家分享的是2013年6月份《Nature Communications》上发表的一篇名为：A solid with a hierarchical tetramodal micro-meso-macro pore size distribution的文章

，文章摘要如下：

Porous solids have an important role in addressing some of the major energy-related problems facing society. Here we describe a porous solid, α-MnO₂, with a hierarchical tetramodal pore size distribution spanning the micro-, meso- and macro pore range, centred at 0.48, 4.0, 18 and 70?nm. The hierarchical tetramodal structure is generated by the presence of potassium ions in the precursor solution within the channels of the porous silica template; the size of the potassium ion templates the microporosity of α-MnO₂, whereas their reactivity with silica leads to larger mesopores and macroporosity, without destroying the mesostructure of the template. The hierarchical tetramodal pore size distribution influences the properties of α-MnO₂ as a cathode in lithium batteries and as a catalyst, changing the behaviour, compared with its counterparts with only micropores or bimodal micro/mesopores. The approach has been extended to the preparation of LiMn2O₄ with a hierarchical pore structure.

该文章中材料的氮吸附表征采用的是美国麦克仪器ASAP 2020，使用该仪器获得材料氮气吸附脱附等温线，通过DFT模型获得材料孔径分布。

详情可参考下面链接：

http://www.nature.com/ncomms/2013/130614/ncomms3015/full/ncomms3015.html

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