A strategy of designed anionic metal-organic framework adsorbent based on reticular chemistry for rapid selective capture of carcinogenic dyes

APPLIED ORGANOMETALLIC CHEMISTRY(2022)

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摘要
In this work, highly effective and rapid removal of cationic carcinogenic organic dye molecules is achieved through the implementation of a novel anionic metal-organic framework (MOF). Benefit from reticular chemistry, an anionic pts topology-directed MOF [CH3NH3][In (TPTAB)4]center dot solvents (In-TPTAB, H4TPTAB = [1,1 ':3 ',1 ''-terphenyl]-4,4 ',4 '',6 '-tetracarboxylic acid) has been solvothermally synthesized. The structural characteristics of high porosity and the large size 1D channel modified by uncoordinated O sites promote In-TPTAB to be a promising adsorbent material. By ion exchange, In/Cu-TPTAB exhibits obviously increased BET surface area (248 m2 g-1) compared with In-TPTAB (55 m2 g-1). More importantly, In-TPTAB presents commendable performances with the maximum adsorption capacities for toxic dye BR9 and MLB are up to 368 and 304 mg g-1, and the adsorption rates are 10.9 and 6.7 mg g-1 min-1, respectively. It is noteworthy that the high-efficiency capacity of In-TPTAB in capturing dyes surpasses many reported adsorbent materials. The mechanism of physical adsorption can be ascribed to the synergistic effect of multiple host-guest interactions. Coupled with the good recyclable, push In-TPTAB to be potential used for the removal of cationic organic pollutants
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关键词
anionic MOF, reticular chemistry, ion exchange, carcinogenic dyes, selective capture
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