Permeability and selectivity synergistically enhanced nanofluidic membrane for osmotic energy harvesting

作     者：Zhong, Jundong Xu, Tingting Qi, Hongyan Sun, Weibo Zhao, Shuang Zhao, Zhe Sun, Yirong Zhu, Youliang Mu, Jianxin Zhang, Haibo Zhu, Xuanbo Jiang, Zhenhua Jiang, Lei 

作者机构：Jilin Univ Natl & Local Joint Engn Lab Synthet Technol High P Changchun Jilin Peoples R China Jilin Univ Key Lab Mol Enzymol & Engn Minist Educ Changchun Jilin Peoples R China Jilin Univ Coll Chem Natl & Local Joint Engn Lab Synthet Technol High P Changchun 130012 Jilin Peoples R China Jilin Univ State Key Lab Supramol Struct & Mat Changchun Jilin Peoples R China Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing Peoples R China 

出 版 物：《CARBON ENERGY》 (碳能源（英文）)

年 卷 期：2024年第6卷第8期

页      面：14-24页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Natural Science Foundation of Jilin Province Fundamental Research Funds for the Central Universities National Natural Science Foundation of China Capital Construction Fund of Jilin Province [2021C039-1] YDZJ202101ZYTS002 

主　　题：blue energy generator charge tunable graphene oxide ion transport layered nanocomposites GRAPHENE OXIDE MEMBRANE ION-TRANSPORT NANOPORES 

摘      要：For the porous-membrane-based osmotic energy generator, the potential synergistic enhancement mechanism of various key parameters is still controversial, especially because optimizing the trade-off between permeability and selectivity is still a challenge. Here, to construct a permeability and selectivity synergistically enhanced osmotic energy generator, the two-dimensional porous membranes with tunable charge density are prepared by inserting sulfonated polyether sulfone into graphene oxide. Influences of charge density and pore size on the ion transport are explored, and the ionic behaviors in the channel are calculated by numerical simulations. The mechanism of ion transport in the process is studied in depth, and the fundamental principles of energy conversion are revealed. The results demonstrate that charge density and pore size should be matched to construct the optimal ion channel. This collaborative enhancement strategy of permeability and selectivity has significantly improved the output power in osmotic energy generation; compared to the pure graphene oxide membrane, the composite membrane presents almost 20 times improvement. Transmembrane properties of ions are crucial for osmotic energy conversion. In this study, to achieve synergistic enhancement of permeability and selectivity, the mechanism of charge density and pore size in ion transport are studied in-depth. Results of the experiment and theoretical calculation demonstrate that the charge density and pore size should be matched to construct the optimal ion channel. This collaborative enhancement strategy of permeability and selectivity is expected to promote the utilization of clean energy in the future. image