Superior absorption capacity of tremella like ferrocene based metal-organic framework in removal of organic dye from water.

Removal of organic dyes from water by porous materials is considered as an efficient and low-cost way. Herein for the first time novel tremella-like ferrocene based metal-orgainc framework (TMOF) nanosheets designated as TFMOF were synthesized through a traditional solvothermal method. This ferrocene based TFMOF exhibit outstanding removal efficiency towards organic dye Congo red (CR) from water. After optimizing the reaction conditions, the highest adsorption capacity of 252.25 mg g could be achieved within 10 min. Furthermore, the investigation of adsorption kinetic indicated this adsorption process could be described as a pseudo-second order kinetic model with k and q of 0.0488 g mg min and 241.5 mg g, respectively. The adsorption isotherm could also be described as the Sips isotherm model according to the fitting calculation. The removal efficiency could maintain around 50 % with adsorption capacity of 124.38 mg g after 3 cycles, giving the TFMOF promising potential in the practical water treatment.