Molecular bridges stabilize graphene oxide membranes in water.
Molecular bridges stabilize graphene oxide membranes in water.
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DOI：
10.1002/anie.201913010
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发表时间：
2019-11
影响因子：
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通讯作者：
Mengchen Zhang;Yangyang Mao;Guozhen Liu;Gongpin Liu;Yiqun Fan;W. Jin
中科院分区：
文献类型：
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作者：
Mengchen Zhang;Yangyang Mao;Guozhen Liu;Gongpin Liu;Yiqun Fan;W. Jin
最近的创新突出了二维材料，如氧化石墨烯（GO）薄膜在水相关应用中的巨大潜力。然而，不良的水诱导效应，如堆叠的氧化石墨烯层压板的再分散和剥落，极大地降低了它们的既定性能并影响了它们的实际应用。在水中稳定氧化石墨烯膜仍然是一个巨大的挑战。在这里，我们报告了一种分子桥策略，其中层间短链分子桥产生坚固的氧化石墨烯层压板，可以抵抗膨胀的趋势。此外，界面长链分子桥将氧化石墨烯层板附着在多孔基板上，以增加膜的机械强度。通过合理创建和调整分子桥，稳定的氧化石墨烯膜可以在恶劣的操作条件下（如横流、高压和长期过滤）表现出出色的耐久性。所提出的氧化石墨烯膜的通用和可扩展的稳定方法为在水环境中使用可靠的二维层流膜开辟了新的机会。
Recent innovations highlight the great potential of two-dimensional materials, such as graphene oxide (GO) films, in water-related applications. However, undesirable water-induced effects, such as the redispersion and peeling of stacked GO laminates, greatly degrade their established performance and impact their practical application. It remains a great challenge to stabilize GO membranes in water. Here, we report on a molecular bridge strategy, in which an interlaminar short-chain molecular bridge generates a robust GO laminate that resists the tendency to swell. Furthermore, an interfacial long-chain molecular bridge adheres the GO laminate onto a porous substrate to increase the mechanical strength to the membrane. By rationally creating and tuning the molecular bridges, the stabilized GO membranes can exhibit outstanding durability in harsh operating conditions, such as cross-flow, high-pressure, and long-term filtration. The proposed general and scalable stabilizing approach for GO membranes opens new opportunities for reliable two-dimensional laminar films used in aqueous environments.