In situ modification of ZIF-67 with multi-sulfonated dyes for great enhanced methylene blue adsorption via synergistic effect

It is essential mean to adsorptive remove organic pollutants such dyestuff for water remediation. Herein in situ modification of the classic metal-organic framework ZIF-67 with –SO3 groups was easily achieved by the efficient adsorption of multi-sulfonated dyes due to the coordinative interaction between the unoccupied Co(II) of ZIF-67 and –SO3 of the dyes.