Fig. 4: Osmotic energy conversion performance of PESM.
From: Polyoxometalate-based plasmonic electron sponge membrane for nanofluidic osmotic energy conversion
A Ion selectivity of PESM is investigated by measuring the ionic current in two different salt concentrations. 100 mM KCl solution is placed on Au@POMs side and 0.001 mM KCl on AAO side. The black curve represents the current contributed by Cl- and the red curve represents the current contributed by K+. B I−V curves of the PESM under two different arrangements of the concentration gradient: red curve is achieved by placing high-concentration solution on AAO side, black curve is by placing high-concentration solution on Au@POMs side. C Osmotic current and osmotic potential under a series of KCl concentration gradients. Error bars represent standard deviation of three different measurements. D Current density of PESM with light irradiation under a series of NaCl concentration gradients. E Power density of PESM with light irradiation under a series of NaCl concentration gradients. F Illustration of the ion transport mechanism of PESM with and without light irradiation for osmotic energy conversion. The orange arrow represents the transport direction of Na+. The green arrow represents the transport direction of Cl-. Source data are provided as a Source Data file.
