Tunable Interlayer‐Spacing Graphene Oxide Membrane: Efficient Osmotic Energy Conversion Toward Metal Recovery
Source abstract
Abstract
Abstract 2D material membranes show promise in osmotic energy (OE) conversion and separation technologies. However, low ion flux and swelling limit their applications. Herein, a polydopamine‐crosslinked graphene oxide membrane (PDA@GO) with tunable interlayer spacing is developed to address these challenges. PDA expands the interlayer spacing, optimizes Debye length matching, and reduces ion transport barriers. Compared to pristine GO membranes, PDA@GO membranes achieve a 369% higher ion flux and a power density of 10.06 W m −2 under a 500‐fold NaCl gradient. Besides, PDA@GO membranes show excellent anti‐swelling stability in aqueous solution up to 60 days. Furthermore, integrating green chemistry principles, PDA@GO enables dual energy‐resource utilization, successfully recovering copper ions from wastewater via OE. This work highlights the potential of 2D membrane systems in high‐efficiency energy conversion and sustainable wastewater treatment.
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Research context
OpenAlex topics: Membrane Separation Technologies · Membrane-based Ion Separation Techniques · Nanopore and Nanochannel Transport Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Biogeology and Environmental Geology Engineering Research Center of Nano‐Geomaterials of Ministry of Education Faculty of Material Science and Chemistry China University of Geosciences Wuhan 430074 P. R. China
College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Speed Capability Research Su Bingtian Center for Speed Research and Training Jinan University Guangzhou 510632 P. R. China
College of Chemistry Zhengzhou University Zhengzhou 450001 P. R. China
Funding
National Natural Science Foundation of China · National Key Research and Development Program of China · Natural Science Foundation of Hubei Province · Natural Science Foundation of Shenzhen Municipality
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