Yang Guohai, Zhang Daqing, Wang Cheng, Liu Hong, Qu Lulu, Li Haitao
School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China.
Key Laboratory of Gas and Fire Control for Coal Mines (Ministry of education), China University of Mining and Technology, Xuzhou 221116, China.
Nanomaterials (Basel). 2019 Mar 6;9(3):386. doi: 10.3390/nano9030386.
Residual antibiotics in water have become a primary source of water pollution due to their misuse. Recently, membranes, produced by layered nanomaterials such as graphene oxide (GO), boron nitride (BN) and transition metal dichalcogenides, have been used in water purification, desalination and molecule separation as they are energy saving and simple to operate. The performance of membranes is closely related to their structure and the properties of the nanomaterials used. In this work, BN nanosheets (BNNSs) and GO were used to fabricate a two-dimensional nanocomposite membrane in order to improve the membrane's permeance. It should be mentioned that the corresponding equal mass of the pure GO membrane was almost impermeable for the antibiotic solution. Multi-walled carbon nanotubes (MWCNTs) were inserted into the GO layers to increase the interlayer spacing and adsorb more antibiotics from the water. The resultant MWCNTs/BNNSs/GO membranes showed improved permeance and stable sieving capability for the antibiotic and small species. Specifically, permeance reached 30.2 L m h bar, which was much higher than pure GO membrane and the antibiotic rejection was 96.1%.
由于抗生素的滥用，水中的残留抗生素已成为水污染的主要来源。最近，由氧化石墨烯（GO）、氮化硼（BN）和过渡金属二硫属化物等层状纳米材料制成的膜，因其节能且操作简单，已被用于水净化、海水淡化和分子分离。膜的性能与其结构以及所用纳米材料的性质密切相关。在这项工作中，使用BN纳米片（BNNSs）和GO制备了二维纳米复合膜，以提高膜的渗透率。应该提到的是，相应等质量的纯GO膜对抗生素溶液几乎是不可渗透的。将多壁碳纳米管（MWCNTs）插入GO层中以增加层间距并从水中吸附更多抗生素。所得的MWCNTs/BNNSs/GO膜对抗生素和小分子表现出改善的渗透率和稳定的筛分能力。具体而言，渗透率达到30.2 L m h bar，远高于纯GO膜，抗生素截留率为96.1%。
