High-performance H 2 /CO 2 separation from 4-nm-thick oriented Zn 2 (benzimidazole) 4 films

IF 11.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Advances Pub Date : 2024-12-13 DOI:10.1126/sciadv.ads6315
Shuqing Song, Qi Liu, S. Swathilakshmi, Heng-Yu Chi, Zongyao Zhou, Ranadip Goswami, Dmitry Chernyshov, Kumar Varoon Agrawal
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Abstract

High-performance membrane-based H 2 /CO 2 separation offers a promising way to reduce the energy costs of precombustion capture. Current membranes, often made from two-dimensional laminates like metal-organic frameworks, have limitations due to complex fabrication methods requiring high temperatures, organic solvents, and long synthesis time. These processes often result in poor H 2 /CO 2 selectivity under pressurized conditions due to defective transport pathways. Here, we introduce a simple, eco-friendly synthesis of ultrathin, intergrown Zn 2 (benzimidazole) 4 films, as thin as 4 nm. These films are prepared at room temperature using water as the solvent, with a synthesis time of just 10 minutes. By using ultradilute precursor solutions, nucleation is delayed, promoting rapid in-plane growth on a smooth graphene substrate and eliminating defects. These membranes exhibit excellent H 2 permselectivity under pressurized conditions. The combination of rapid, green synthesis and high-performance separation makes these membranes highly attractive for precombustion applications.
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基于高性能膜的 H 2 /CO 2 分离为降低燃烧前捕获的能源成本提供了一种可行的方法。目前的膜通常由金属有机框架等二维层压材料制成,由于制造方法复杂,需要高温、有机溶剂和较长的合成时间,因此存在局限性。在加压条件下,由于传输途径存在缺陷,这些工艺通常会导致 H 2 /CO 2 选择性较差。在这里,我们介绍了一种简单、环保的超薄间生 Zn 2 (benzimidazole) 4 薄膜合成方法,其厚度仅为 4 纳米。这些薄膜以水为溶剂在室温下制备,合成时间仅需 10 分钟。通过使用超稀释前驱体溶液,成核过程被延迟,从而促进了在光滑石墨烯基底上的快速面内生长,并消除了缺陷。这些膜在加压条件下表现出优异的 H 2 过选择性。快速、绿色合成与高性能分离的结合使这些膜在预燃烧应用中极具吸引力。
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来源期刊
Science Advances
Science Advances 综合性期刊-综合性期刊
CiteScore
21.40
自引率
1.50%
发文量
1937
审稿时长
29 weeks
期刊介绍: Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.
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