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A Facile and Scalable Method of Fabrication of Large-Area Ultrathin Graphene Oxide Nanofiltration Membrane
ACS Nano ( IF 15.8 ) Pub Date : 2021-09-03 , DOI: 10.1021/acsnano.1c06155 Zhiyu Liu 1 , Zhong Ma 1, 2 , Baitai Qian 1 , Anson Y H Chan 1 , Xiaowen Wang 1 , Yang Liu 3 , John H Xin 1
ACS Nano ( IF 15.8 ) Pub Date : 2021-09-03 , DOI: 10.1021/acsnano.1c06155 Zhiyu Liu 1 , Zhong Ma 1, 2 , Baitai Qian 1 , Anson Y H Chan 1 , Xiaowen Wang 1 , Yang Liu 3 , John H Xin 1
Affiliation
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With their ultrafast water transport and excellent molecule sieving properties, graphene oxide (GO)-based membranes show great potential in the membrane filtration field for water purification and molecular separation. However, the inability of uniform GO membranes to be produced on an industrial scale and their nonenvironmentally friendly reduction treatment are the bottleneck preventing their industrial applications. Herein, we report a scalable ultrathin uniform GO membrane fabrication technique. Ultrathin GO membranes with a large area of 30 × 80 cm2 and a thickness of a few nanometers were uniformly and facilely fabricated using a continuous process combining Mayer rod-coating and a short-time, high-power UV reduction. The interlayer spacing of the GO membrane could be effectively reduced and regulated to improve the salt rejection rate. The fabricated membrane showed superior water permeability of over 60.0 kg m–2 h–1 and a high separation efficiency of over 96.0% for a sodium sulfate (Na2SO4) solution. It also exhibited excellent mechanical stability under various harsh crossflow conditions. More importantly, the fabrication method developed here can be scaled up using a roll-to-roll industrial production process, which successfully solves the problem currently faced by GO membrane researchers and makes the industrial usage of GO membrane a reality.
中文翻译：
一种简便且可扩展的大面积超薄氧化石墨烯纳滤膜的制备方法
凭借其超快的水传输和优异的分子筛分特性，氧化石墨烯 (GO) 基膜在水净化和分子分离的膜过滤领域显示出巨大的潜力。然而，无法在工业规模上生产均匀的 GO 膜及其非环境友好的还原处理是阻碍其工业应用的瓶颈。在此，我们报告了一种可扩展的超薄均匀 GO 膜制造技术。30 × 80 cm 2大面积超薄GO膜使用结合 Mayer 棒状涂层和短时间、高功率紫外线减少的连续工艺，均匀且轻松地制造了几纳米的厚度。可以有效地减小和调节GO膜的层间距以提高脱盐率。制成的膜显示出超过 60.0 kg m –2 h –1 的优异透水率和超过 96.0% 的硫酸钠 (Na 2 SO 4） 解决方案。它还在各种苛刻的错流条件下表现出优异的机械稳定性。更重要的是，这里开发的制造方法可以使用卷对卷工业生产工艺进行放大，成功解决了目前GO膜研究人员面临的问题，使GO膜的工业应用成为现实。
更新日期：2021-09-28
中文翻译：
一种简便且可扩展的大面积超薄氧化石墨烯纳滤膜的制备方法
凭借其超快的水传输和优异的分子筛分特性，氧化石墨烯 (GO) 基膜在水净化和分子分离的膜过滤领域显示出巨大的潜力。然而，无法在工业规模上生产均匀的 GO 膜及其非环境友好的还原处理是阻碍其工业应用的瓶颈。在此，我们报告了一种可扩展的超薄均匀 GO 膜制造技术。30 × 80 cm 2大面积超薄GO膜使用结合 Mayer 棒状涂层和短时间、高功率紫外线减少的连续工艺，均匀且轻松地制造了几纳米的厚度。可以有效地减小和调节GO膜的层间距以提高脱盐率。制成的膜显示出超过 60.0 kg m –2 h –1 的优异透水率和超过 96.0% 的硫酸钠 (Na 2 SO 4） 解决方案。它还在各种苛刻的错流条件下表现出优异的机械稳定性。更重要的是，这里开发的制造方法可以使用卷对卷工业生产工艺进行放大，成功解决了目前GO膜研究人员面临的问题，使GO膜的工业应用成为现实。
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