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Facile Synthesis of Aluminum‐Based Metal–Organic Frameworks with Different Morphologies and Structures through an OH − ‐Assisted Method
Author(s) -
Lin Yichao,
Kong Chunlong,
Chen Liang
Publication year - 2013
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201300135
Subject(s) - nanorod , dodecahedron , materials science , adsorption , metal organic framework , morphology (biology) , thermal decomposition , chemical engineering , metal , aluminium , hexagonal crystal system , crystallography , crystal structure , thermal stability , ion , nanotechnology , chemistry , organic chemistry , composite material , metallurgy , biology , engineering , genetics
We report the facile synthesis of aluminum‐based metal–organic frameworks (MOFs) with different morphologies and structures by tuning the OH − content in the reaction solution. MIL‐96 crystals with dodecahedral and hexagonal column shapes were successfully synthesized by tuning the OH − ion content of the synthesis solution. When the OH − ion content was further increased, MIL‐110 with a nanorod morphology appeared as the product. For the first time, we obtained pure MIL‐96 and MIL‐110 under basic conditions directly by using the 1,3,5‐benzenetricarboxylic acid (btc) linker. All samples show significant thermal stability , with a decomposition temperature above 300 °C. We found that the gas adsorption properties of MIL‐96 were directly dominated by the crystal morphology. At 0.4 °C and 30 bar, the dodecahedral and hexagonal MIL‐96 samples can adsorb 9.3 and 6.5 mmol g −1 CO 2 , respectively, although they possess similar surface areas and identical crystalline structures. The MIL‐110 nanorod shows a CO 2 adsorption capacity of up to 16 mmol g −1 under the same conditions.