Search

The present research focuses on the synthesis and applications of a series of hyper-cross-linked polymer networks obtained from the one-step Friedel–Crafts reaction of triphenylsilane and formaldehyde dimethyl acetal. The materials were characterized through FTIR, 13C NMR, PXRD, TGA, N2 adsorption-desorption isotherms, H2 sorption and dye adsorption. These materials exhibited increased surface areas of approximately 441–1101 m2 g−1 with increasing ratio of monomer to cross-linker. The H2 storage capacity of the polymer networks reached 1.19 wt % (5.96 mmol g−1) under 1.03 bar and 77.3 K. In addition, the material showed excellent adsorption capacity of 806 mg g−1 for Congo Red and retained their adsorption capacity after recycling nine times. Taken together, the results demonstrate that the obtained hyper-cross-linked polymers could be applied to H2 storage and water treatment. [ABSTRACT FROM AUTHOR]

A 3-D porous metal–organic framework [Cu(SiF6)(4,4′-bpy)2] was reported to have high methane storage. The studies about [Cu(SiF6)(4,4′-bpy)2] were only related with methane storage but information on detailed synthesis and characterization as well as adsorption properties of [Cu(SiF6)(4,4′-bpy)2], especially the H2 and CO2 adsorption properties, was scarce. In this work, [Cu(SiF6)(4,4′-bpy)2] has been synthesized by adjusting the molar ratio of the reagents, synthesis temperature, and crystallization time. This method for obtaining [Cu(SiF6)(4,4′-bpy)2] at low temperature has not been reported before. Temperature played an important role in synthesis of the sample and low temperature was beneficial for synthesizing bigger sample. Adsorption isotherms for carbon dioxide and hydrogen were measured under high pressure. [Cu(SiF6)(4,4′-bpy)2] exhibited H2 storage up to 2.36 wt% at 18 bar and a high CO2 capture up to 4.17 mmol g−1 at 298 K at 10 bar. [ABSTRACT FROM PUBLISHER]