Removal of Toxic Dyes and Paraquat by a Dual‐Functional Metal‐Organic Framework

Abstract

AbstractEnvironmental contamination due to organic pollutants including organic dyes (e. g., methylene blue (MB)) and paraquat (i. e., methyl viologen (MV)) has become a serious problem. Herein, the removal for toxic cations of methylene blue (MB+) and methyl viologen (MV2+) has been realized by a three‐dimensional (3D) anionic microporous metal‐organic framework, namely [Me2NH2][In(TDC)2] ⋅ 1.5DMA ⋅ H2O (FJSM‐InMOF). FJSM‐InMOF is capable of selectively adsorbing MB+ in the presence of various dyes due to the effects of size‐exclusion and charge‐matching. Particularly, the strategy of combining adsorption and photocatalytic degradation realizes the thorough treatment of MB+, which has been rarely reported. The adsorbent material can be easily regenerated and reused. Moreover, FJSM‐InMOF exhibits a high capacity and rapid kinetics towards more toxic MV2+. This work poses a new way for the selective removal of cationic organic pollutants and highlights the significance of combining different methods for the decontamination of organic pollutants.