From Inorganic to Organic Strategy To Design Porous Aromatic Frameworks for High-Capacity Gas Storage
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- 作者：Lan Huang ; Xiaoping Yang ; Dapeng Cao
- 刊名：Journal of Physical Chemistry C
- 出版年：2015
- 出版时间：February 12, 2015
- 年：2015
- 卷：119
- 期：6
- 页码：3260-3267
- 全文大小：557K
- ISSN：1932-7455
文摘
Developing high-capacity gas storage materials is still an important issue, because it is closely related to carbon dioxide capture and hydrogen storage. This work proposes a 鈥渇rom inorganic to organic鈥?strategy, that is, using tetrakis(4-bromophenyl)methane (TBM) to replace silicon in zeolites, to design porous aromatic frameworks (PAF_XXXs) with extremely high pore volume and accessible surface area, because the silicon atom in the silicon-based zeolites and the TBM ligand have the same coordination manner. Through the adoption of this strategy, 115 organic PAF_XXXs based on the inorganic zeolite structures were designed. These designed PAF_XXXs have the same topology with the corresponding matrix zeolites but possess significantly higher porosity than matrix zeolites. In general, the surface area, pore volume, and pore size of PAF_XXX are in the ranges of 4600鈥?000 m2/g, 2.0鈥?.9 g/cm3, and 10鈥?5 脜, respectively. In particular, the hydrogen uptake of PAF_RWY reaches 5.9 wt % at 100 bar and 298 K, exceeding the DOE 2015 target (5.5 wt %) for hydrogen storage. Moreover, PAF_RWY is also a promising candidate for methane storage and CO2 capture, owing to its extremely high pore volume and accessible surface area.