CSIRO Manufacturing, Clayton South 3169, Victoria, Australia.
The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China.
ACS Appl Mater Interfaces. 2023 Jul 5;15(26):31561-31571. doi: 10.1021/acsami.3c06103. Epub 2023 Jun 20.
Graphene oxide (GO) membranes are emerging for water treatment. Meanwhile, challenges remain due to membrane fouling and their instability in aqueous solutions. Herein, a novel GO-based mixed-dimensional membrane with superior antifouling and nonswelling properties was prepared by assembling two-dimensional (2D) GO nanosheets and zero-dimensional (0D) copper(I) oxide-incorporated titanium dioxide photocatalyst (CT). The decoration of CT in GO nanosheets tuned the microstructure and surface hydrophilicity while creating more transport channels in CT/GO membranes. This resulted in a high water permeance of 171.5 L m h bar and improved selectivity to various dye molecules (96.2-98.6%). Due to the significantly enhanced antibacterial properties of the CT nanoparticles, the growth of bacteria on the surface of the CT/GO membrane was suppressed (threefold less than that on the GO membrane). Moreover, the embedding of photocatalysts also allowed CT/GO membranes to exhibit ∼9-fold improvement in antibacterial activity and organic dye degradation performance under visible-light irradiation. This study offers a powerful solution to enhance the nanofiltration performance and antibacterial properties of GO membranes toward practical applications.
氧化石墨烯（GO）膜在水处理领域崭露头角。然而，由于膜污染和在水溶液中的不稳定性，仍然存在挑战。在此，通过组装二维（2D）GO 纳米片和零维（0D）铜（I）氧化物掺杂的二氧化钛光催化剂（CT），制备了一种具有优异抗污染和不溶胀性能的新型 GO 基混合维度膜。CT 在 GO 纳米片中的修饰调整了其微观结构和表面亲水性，同时在 CT/GO 膜中创造了更多的传输通道。这导致水渗透通量高达 171.5 L m h bar，对各种染料分子的选择性提高（96.2-98.6%）。由于 CT 纳米颗粒显著增强的抗菌性能，抑制了细菌在 CT/GO 膜表面的生长（比在 GO 膜表面的生长少三倍）。此外，光催化剂的嵌入还使 CT/GO 膜在可见光照射下的抗菌活性和有机染料降解性能提高了约 9 倍。本研究为提高 GO 膜的纳滤性能和抗菌性能提供了一种有力的解决方案，有望应用于实际。
