Engineering grain boundaries in monolayer molybdenum disulfide for efficient water-ion separation

• 成果类型: Article
• 署名作者: Shen, Jie; Aljarb, Areej; Cai, Yichen; Liu, Xing; Min, Jiacheng; Wang, Yingge; Wang, Qingxiao; Zhang, Chenhui; Chen, Cailing; Hakami, Mariam; Fu, Jui-Han; Zhang, Hui; Li, Guanxing; Wang, Xiaoqian; Chen, Zhuo; Li, Jiaqiang; Dong, Xinglong; Shih, Kaimin; Huang, Kuo-Wei; Tung, Vincent; Shi, Guosheng; Pinnau, Ingo; Li, Lain-Jong; Han, Yu
• 署名单位: King Abdullah University of Science & Technology; Nanyang Technological University; King Abdulaziz University; King Abdullah University of Science & Technology; Nanjing Tech University; Nanjing Tech University; Shanghai University; University of Hong Kong; University of Hong Kong; King Abdullah University of Science & Technology; University of Tokyo; South China University of Technology; South China University of Technology; Saudi Aramco; Chang Gung University; Chinese Academy of Sciences; Qinghai Institute of Salt Lakes, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; National University of Singapore; South China University of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13792
• DOI: 10.1126/science.ado7489
• 发表日期: 2025-02-14
• 页码: 776-782
• 关键词: thin-film nanocomposite; membranes; graphene; oxide; channels; GROWTH; atom; nanofiltration; desalination; fabrication

摘要

Two-dimensional (2D) materials have long been considered as ideal platforms for developing separation membranes. However, it is difficult to generate uniform subnanometer pores over large areas on 2D materials. We report that the well-defined eight-membered ring (8-MR) pores, typically formed at the boundaries of two antiparallel grains of monolayer molybdenum disulfide (MoS2), can serve as molecular sieves for efficient water-ion separation. The density of grain boundaries and, consequently, the number of 8-MR pores can be tuned by regulating the grain size. Optimized MoS2 membranes outperformed the state-of-the-art membranes in forward osmosis tests by demonstrating both ultrahigh water/sodium chloride selectivity and exceptional water permeance. Creating precise pore structures on atomically thin films through grain boundary engineering presents a promising route for producing membranes suitable for various applications.