Abstract
Abstract NbO-type MOF nano/microcrystals were facilely achieved by tuning the volume ratio of DMF and H2O mixed solvent under solvothermal conditions. It was found that NOTT-102 rhombohedral sample obtained with DMF:H2O volume ratio of 15:5 has the largest BET surface area (3006 m2 g−1), compared to the samples with the DMF:H2O volume ratio of 12:8 (2263 m2 g−1) and 20:0 (1962 m2 g−1) as well as the bulk NOTT-102, namely [Cu2(QPTC)] (H4QPTC = [1,1':4′,1″:4″,1‴-quaterphenyl]-3,3‴,5,5‴-tetracarboxylic acid), crystals (2942 m2 g−1). Furthermore, dye adsorption results indicate that NOTT-102 rhombohedral sample exhibits superior adsorption capacity (850 mg g−1) and adsorption selectivity for methylene blue (MB) in contrast to methyl orange, rhodamine B, and acid chrome blue K dyes, which may be one of the promising candidates for potential application in removal of organic dyes from aqueous solution.
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