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二维Ag@MoS2-GO复合纳滤膜的制备及其性能

作者：陈甜，年佩，李亚男，徐楠，孙浩楠，魏逸彬

单位：省部共建煤炭高效利用与绿色化工国家重点实验室，宁夏大学化学化工学院，银川 750021；宁夏圆惠环保科技有限公司，石嘴山 753000

关键词：二硫化钼；氧化石墨烯；银纳米颗粒；复合纳滤膜

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2022,42(5):33-41

摘要：

采用平均孔径为 100 nm的聚醚砜（PES）微滤膜为载体，经多巴胺改性后，使用真空抽滤法制备了一种新型Ag@MoS2-GO复合纳滤膜。通过调节MoS2的负载量得到MoS2和GO的最优质量比，进一步将AgNP生长在MoS2纳米上并插层在GO纳米片层，实现了Ag@MoS2-GO纳滤膜性能的调控。结果表明，当MoS2和GO质量比为6∶1时，MoS2-GO膜的纳滤性能最优，对四种染料的截留率均在95%以上，水渗透率约为1.13 L/(m2·h·bar)，相较于纯GO膜提升了近2倍；Ag@MoS2-GO膜在保持与 MoS2-GO膜同等优异的染料截留性能的同时，水渗透率达到1.89 L/(m2·h·bar)，相较于MoS2-GO膜又提升了0.7倍；对4种盐的截留规律满足：R（Na2SO4 ）＞R（MgSO4）＞R（NaCl）＞R（MgCl2），截留率分别为78%、67%、51%和41%，较MoS2-GO纳滤膜有显著提高，且该膜展现出良好的稳定性。

A novel Ag@MoS2-GO composite nanofiltration membrane was prepared by Vacuum filtration using PES microfiltration membrane with an average pore size of 100 nm as carrier and modified by dopamine.The optimal mass ratio of MoS2 and GO was obtained by adjusting MoS2 load.AgNP was further grown on MoS2 nanosheet and intercalated on GO nanofiltration layers to achieve the regulation of Ag@MoS2-GO nanofiltration membrane performance.The results showed that MoS2-GO membrane had the best nanofiltration performance when the mass ratio of MoS2 to GO was 6∶1.The rejection rate of four typical dyes was above 95%,and the water permeability was about 1.13 L/(m2·h·bar),which was nearly two times higher than that of pure GO membrane.While maintaining the same excellent dye retention performance as MoS2-GO membrane,Ag@MoS2-GO membrane has a water permeability of 1.89 L/(m2·h·bar), which is 0.7 times higher than MoS2-GO membrane.The rejection rate of Ag@MoS2-GO membrane to four salts satisfies the following relation:R(Na2SO4)>R(MgSO4)>R(NaCl)>R(MgCl2).and the rejection rates were 78%, 67%, 51% and 41%,respectively,which were significantly higher than MoS2-GO nanofiltration membrane,and the membrane showed good stability.

基金项目：

国家自然科学基金项目（22108130；22008125）；宁夏重点研发项目（2020BEB04016；2020BEB04037）

作者简介：

陈甜（1998-），女，陕西渭南人，硕士生，研究方向，主要从事二维材料纳滤膜的制备及性能研究，E-mail：1473013023@qq.com

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