Influence of graphene oxide's characteristics on the fabrication and performance of crosslinked nanofiltration membranes

Transition Metal Oxide‐Decorated MXenes as Drugless Nanoarchitectonics for Enriched Nanocatalytic Chemodynamic Treatment

“…The resultant Zeta potential value of the 2D materials could also be related to the particle diameter or dimensions to a considerable extent, in accordance with the reported literature. [ 30 ] The ultrasonication for 2 h could result in more uniform‐sized exfoliated 2D nanosheets in smaller particle dimensions compared to the ultrasonication time of 4 h. Interestingly, the increased ultrasonication time further to 6 h could result in the smaller‐sized exfoliated nanosheets. Accordingly, we observed an increased zeta potential value toward the positive end with increased ultrasonication time initially from 2 to 4 h. The reason behind the slight change in the absolute value of the zeta potential of the designed nanosheets for 4 h compared to 2 h could be due to an increase in the lateral size of the MXene nanosheets.…”

“…These results were in agreement and could be compared with the changes in the eventual size of the nanosheets, as evident in the literature. [ 30,31 ] Despite the altered trends with the increase in the ultrasonication time, the Zeta potential values of MXene‐based colloidal solutions were maintained to be lower than −20 mV, indicating the good stability of these nanocolloidal systems (Figure 1F). Accordingly, the shortest ultrasonication time of 2 h with the highest zeta value among the selected time intervals could be more conducive to the in situ growth of Cu 2 O on the 2D MXene surfaces.…”

Systematic covalent crosslinking of graphene oxide membranes using 1,3,5 triazine 2,4,6 triamine for enhanced structural intactness and improved nanofiltration performance

“…The suspension was then sonicated for 2 hours to hasten the individuality and stability of the suspension prior to fabrication. The control, uncrosslinked where just dip-coated while for the crosslinked membranes were fabricated using the dipassisted layer by layer method, alike in our previous studies [56][57][58][59]. Here, an interchangeable immersion between GO and MLM is undertaken in order to interconnect the GO nanosheets and the crosslinker.…”

“…To compare the nanofiltration performance of the fabricated membranes, a methyl methacrylate homemade nanofiltration cell alike in our previous works [58] was constructed. In this cell a porous sintered polyethylene plate with a 4.7 cm diameter was used.…”

Graphene-based composite membranes for nanofiltration: performances and future perspectives

“…Separation from small or medium-mass organic molecules is also a challenge in the field of nanofiltration. Using polyacrylonitrile membranes as support, GO solutions were filtered, ultrased at different times, followed by coating membranes supporting polyethyleneimine through interfacial polymerization and surface reticulation [41]. The membranes were used for the filtration of methylene blue from aqueous solutions as the function of the time allotted to the dispersion of graphene, the retention ranging from 56 to 98% (for dispersion in the ultrasonic field for 120′).…”