Long Qingwu, Chen Liangwei, Zong Yingxin, Wan Xiaodan, Liu Feng, Luo Huayong, Chen Yanwu, Zhang Zhe
College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan 528333, China.
Institute of Environmental Research at Greater Bay/Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
J Colloid Interface Sci. 2024 Dec;675:958-969. doi: 10.1016/j.jcis.2024.07.027. Epub 2024 Jul 10.
Graphene oxide (GO) membranes have emerged as promising candidates for water purification applications, owing to their unique physicochemical attributes. Nevertheless, the trade-off between permeability and selectivity, coupled with their vulnerability to membrane fouling, poses significant challenges to their widespread industrial deployment. In this study, we introduce an innovative in-situ growth and layer-by-layer assembly technique for fabricating multilayer GO membranes reinforced with bismuth oxybromide (BiOBr) on commonly employed Nylon substrates. This method allows for the creation of two-dimensional lamellar membranes capable of photocatalytic self-cleaning and tunable nanochannel dimensions. The synthesized GO/BiOBr composite membranes exhibit remarkable water permeance rates (approximately 493.9 LMH/bar) and high molecular rejection efficiency (>99 % for Victoria Blue B and Congo Red dyes). Notably, these membranes showcase an enhanced photocatalytic self-cleaning performance upon exposure to visible light. Our work provides a viable route for the fabrication of functionalized GO-based nanofiltration membranes with BiOBr inclusions, offering a synergistic combination of high water permeability, modifiable nanochannels, and effective self-cleaning capabilities through photocatalysis.
氧化石墨烯（GO）膜因其独特的物理化学特性，已成为水净化应用中颇具潜力的候选材料。然而，渗透率与选择性之间的权衡，以及它们易受膜污染的特性，对其广泛的工业应用构成了重大挑战。在本研究中，我们引入了一种创新的原位生长和逐层组装技术，用于在常用的尼龙基材上制备用溴氧化铋（BiOBr）增强的多层GO膜。该方法能够制备出具有光催化自清洁功能且纳米通道尺寸可调的二维层状膜。合成的GO/BiOBr复合膜表现出显著的透水率（约493.9 LMH/bar）和高分子截留效率（对维多利亚蓝B和刚果红染料的截留率>99%）。值得注意的是，这些膜在可见光照射下展现出增强的光催化自清洁性能。我们的工作为制备含有BiOBr夹杂物的功能化GO基纳滤膜提供了一条可行的途径，通过光催化实现了高水渗透性、可调节纳米通道和有效自清洁能力的协同结合。
