A new 3D cobalt (II) metal–organic framework nanostructure for heavy metal adsorption

• A new 3D MOF was hydrothermally synthesized and structurally characterized.
• We have prepared nanoscale crystal upon ultra-sonication.
• Both bulk and nanoparticles were utilized for adsorption of some heavy metal ions.
• The results show an efficient sorbent with structurally stable MOF.

A new metal–organic framework (MOF), based on 4,4′,4″-s-triazin-1,3,5-triyltri-p-aminobenzoate (TATAB) [[Co2(TATAB)(OH)(H2O)2]·H2O·0.6O]n (1) was hydrothermally synthesized and characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), infrared spectroscopy (IR) and thermogravimetric analysis (TGA). Compound 1 was also prepared in nanoscale using ultrasound radiation. The adsorption behavior of 1 and its nanostructure was investigated with respect to Pb2+, Cd2+, Al3+, Hg2+ and Fe3+ ions and the affinity of the adsorption of the metal ions was evaluated in terms of exposure time and pH. The results showed that the prepared compounds are able to adsorb the metal ions efficiently under room conditions.

A new metal–organic framework, [[Co2(C24H15N6O6)(OH)(H2O)2]·H2O·0.6O]n by cobalt ion and TATAB linker has been synthesized for the adsorption of Pb2+, Cd2+, Al3+, Hg2+ and Fe3+ metal ions from aqueous solution.Figure optionsDownload as PowerPoint slide