Realizing synchronous energy harvesting and ion separation with graphene oxide membranes

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Abstract

A synchronous ion separation and electricity generation process has been developed using G-O membranes. In addition to the size effect proposed prevsiouly, the separation of ions can be attributed to the different interactions between ions and G-O membranes; the generation of electricity is due to the confinement of G-O membranes, and the mobility difference of ions. Efficient energy transduction has been achieved with G-O membranes, converting magnetic, thermal and osmotic energy to electricity, distinguishing this material from other commercial semi-permeable membranes. Our study indicated that G-O membranes could find potential applications in the purification of wastewater, while producing electricity simultaneously. With G-O membranes, industrial magnetic leakage and waste heat could also be used to produce electricity, affording a superior approach for energy recovery.

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Sun, P., Zheng, F., Zhu, M., Wang, K., Zhong, M., Wu, D., & Zhu, H. (2014). Realizing synchronous energy harvesting and ion separation with graphene oxide membranes. Scientific Reports, 4. https://doi.org/10.1038/srep05528

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