Polydopamine functionalized graphene oxide membrane with the sandwich structure for osmotic energy conversion

Enhanced Osmotic Energy Conversion with Ultrahigh Ionic Conductivity in Sodium Polystyrenesulfonate/Cellulose Nanofiber Composite Membranes

“…Notably, the ionic conductivity of the PSS/CNF composite membrane, especially in the low concentration region, reaches 0.12 S cm −1 , which is significantly higher than that of pure CNF membranes. Comparing the PSS/CNF composite membrane to other nanofluidic membranes reported in the relevant literature studies (Figure 2e and Table S1), it becomes evident that the PSS/CNF composite membrane demonstrates exceptional high ionic conductivity, surpassing most cellulosebased nanofluidic membranes (ionized wood, 41 ionized loofah, 50 NBCM, 51 RCNF, 52 BC-CMC, 34 N-ABC and P-ABC, 53 PNIPAM-g-sCC, 12 NBC/NGO, 54 GO/CNF, 46 g-C 3 N 4 /CNF, 40 WS 2 /CNF, 55 and MXene/CNF 18 ) and several polymeric membranes (SPEEK, 56 BCP, 57 SPAEK/IPAES-ICM, 13 MXene/PSS, 33 MXene/PEDOT:PSS, 32 GO-MAP, 58 GO/PDA, 59 and PAA/MMT 60 ). This enhancement is attributed to the synergy between PSS and CNFs, which not only provides sufficient nanochannels but also addresses the charge density deficiency observed in pure CNF membranes, thereby facilitating faster cation transport within the nanochannels of the composite membranes.…”

Preanchoring Enabled Directional Modification of Atomically Thin Membrane for High-Performance Osmotic Energy Generation

“…In our experiment, graphene was served as a platform for directional modification to explore osmotic energy conversion owing to its chemical robustness, and capability of large-scale growth and transferring to various types of substrates for commercial market. − We summarized the osmotic power-generation performance of state-of-the-art results from reported graphene-based nanoporous membranes. Notably, the fabricated directionally modified graphene membranes here exhibited an outstanding power density compared to other graphene-based nanoporous membranes at room temperature (Figure d). ,,− …”

Efficient photo-driven ion pump through slightly reduced vertical graphene oxide membranes

“…The core membrane components are the key factors determining the effectiveness of physical ion pumps for energy harvesting, with ion selectivity, permeation, and photoresponsiveness being crucial considerations. Two-dimensional (2D) nanofluidic membranes, constructed using 2D nanomaterials like graphene oxide (GO), [13][14][15] graphene derivatives, [16][17][18] transition metal carbides and nitrides (Mxenes), [19][20][21] transition metal dichalcogenides (TMDs), 22,23 black phosphorus (BP), 24 and caly, 25 offer ideal platforms for nanofluidic ion transport due to their high selectivity and ultrafast permeation. [26][27][28][29] Consequently, physical ion pumps based on 2D nanofluidic membranes have become the focus of extensive research.…”