Fabrication of MXene/PEI functionalized sodium alginate aerogel and its excellent adsorption behavior for Cr(VI) and Congo Red from aqueous solution

MXene/PEI modified sodium alginate aerogel (MPA) was facilely prepared by introducing polyethylenimine (PEI) and amino functionalized Ti3C2Tx into sodium alginate (SA) aerogel matrix through cross-linking reactions. Abundant active groups of PEI coupled with in situ reduction ability of MXene dramatically promoted the removal of Cr(VI), realizing the adsorption capacity of 538.97 mg/g. MPA also possessed an ultrahigh adsorption capacity (3568...