A facile bionic strategy towards Gd (III)-imprinted membranes via interlaced stacking of one-dimensional/two-dimensional nanocomposite materials

Nitrogen-doped nanoporous graphene induced by a multiple confinement strategy for membrane separation of rare earth

“…The selective separation behavior of Sc 3+ from other REEs through the NDNG membrane is investigated in Figure S12 A. Interestingly, the separation factor of M/Sc increases with the increase of pore size, and the largest separation factor is about 3.7 corresponding to Gd 3+ /Sc 3+ . As shown in Table S2 , the separation performance of the NDNG membrane is very similar to that of ion imprinted membranes ( Cui et al., 2019 ; Li et al., 2015 ; Liu et al., 2014 , 2017 ; Lu et al., 2018 ; Zheng et al., 2017 , 2018 ). Because of the large pores in NDNG-3 (∼65 nm), the selectivity for Sc 3+ from other REEs cannot be attributed to the special pore structure and ionic-radius-based theories ( Sun et al., 2013 ).…”

On membrane-based approaches for rare earths separation and extraction – Recent developments

“…Adsorption studies showed that the 3D-IIM membrane demonstrated higher adsorption capacity (120.9 mg g -1 ) compared with the PIM (33.6 mg g -1 ). Cui et al [226] prepared Gd(III)-imprinted membranes based on carbon nanotubes and graphene oxide (GO) modified by poly(dopamine). TEM and SEM analysis showed after the polymerization of dopamine roughness of GO had become lower and less transparent.…”

Adsorption-based Separation and Recovery of Rare Earth Elements

“…The same DTPA-based Gd(III)-IIP was used to separate Gd(III) and other lanthanides and actinides (Vigneau et al, 2002). Other studies on imprinted polymer include La(III)-IIP (Mustapa et al, 2016), Ce(III)-IIP (Keçili et al, 2018;Mustapa et al, 2016), Y(III)-IIPs (Zulfikar et al, 2017), Nd(III)-IIP (Moussa et al, 2017), ionic imprinted mesoporous bilayer films (IIBFs) for Dy(III) and Nd(III) adsorption (Zheng et al, 2018), Gd (III)-imprinted membranes (GIMs) (Cui et al, 2019), and Gd(III)-imprinted divinylbenzene and methacrylic acid copolymer (Bunina et al, 2021). The IIPs show a stronger affinity for the imprinted REE cation compared to other REEs.…”