Fig. 2: Structural analysis.
From: MOF-in-COF molecular sieving membrane for selective hydrogen separation
a XRD patterns. b FTIR spectra. c, d High-resolution XPS spectra of deconvoluted Co2p and N1s in different samples. e Pore-size distribution of powdered TpPa-1 and ZIF-67-in-TpPa-1 with inserted nitrogen adsorption–desorption isotherms measured at 77 K. Adsorption, closed; desorption, open. f Schematic illustrating possible growth sites of MOF inside COF layers.
