Carboxylated multi-walled carbon nanotubes (MWCNTs-COOH)-intercalated graphene oxide membranes for highly efficient treatment of organic wastewater
Carboxylated multi-walled carbon nanotubes (MWCNTs-COOH)-intercalated graphene oxide membranes for highly efficient treatment of organic wastewater
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羧化多壁碳纳米管（MWCNTs-COOH）插层氧化石墨烯膜用于高效处理有机废水
DOI：
10.1016/j.jwpe.2020.101901
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发表时间：
2021-04
影响因子：
7
通讯作者：
Zhang Xiao-Liang
中科院分区：
文献类型：
--
作者：
Zeng Wen-Juan;Li Chuang;Feng Yue;Zeng Shu-Huan;Fu Bing-Xin;Zhang Xiao-Liang
通过将一维羧基化多壁碳纳米管（MWCNTs-COOH）嵌入二维氧化石墨烯（GO）纳米片中，制备了GO/CNTs复合膜，并将其用于有机废水的处理。通过XRD、拉曼、FTIR、TEM和水接触角等表征结果表明，MWCNTs-COOH通过接枝反应成功插层到GO片层中间，提高了膜的透水通量和稳定性。系统研究了GO/CNTs比例、负载量、CNTs种类和载体种类对膜分离亚甲基蓝染料溶液性能的影响。在优化条件下制备的GO/CNTs复合膜，在0.9 bar的跨膜压差下，对亚甲基蓝溶液的渗透通量为34.4 L m-2 h-1，截留率超过99.7%。与原始GO膜相比，其表现出近10倍的水渗透通量提高，同时保持高截留率。静电相互作用和尺寸排阻效应是GO/CNTs膜对不同的正/负电荷染料和中性有机分子的有效分离性能的协同作用。这种GO/CNT膜还表现出良好的耐酸性化学稳定性和高效的分离性能。
GO/CNTs composite membranes with fine hierarchical nanostructure were facilely fabricated by intercalation with 1D carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) into 2D graphene oxide (GO) nanosheets for efficient organic wastewater treatment. By characterization results of XRD, Raman, FTIR, TEM and water contact angle, MWCNTs-COOH was successfully to be intercalated into GO lamellar interlayers with grafting reactions, which would improve water permeated flux and stability of membrane. The influences of GO/CNTs ratios, loading amounts, CNTs types and support types on the membrane separation performance were systematically investigated towards methylene blue dye solution. For the GO/CNTs composite membranes prepared under the optimized conditions, the permeated flux of 34.4 L m−2h-1and rejection over 99.7 % were obtained towards methylene blue solutions under the transmembrane pressure difference of 0.9 bar, respectively. Compared with pristine GO membrane, it exhibited a nearly 10-fold water permeated flux improvement meanwhile maintaining high rejection. Moreover, the electrostatic interaction and size exclusion effects were synergistically contributed to be responsible for the efficiently separation properties of the GO/CNTs membranes towards different positively/negatively charged dyes and neutral organic molecules. Such the GO/CNTs membranes also exhibited good chemical stability for acid resistance with highly efficient separation performance.
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影响因子：
10.9
作者：
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通过氧化石墨烯膜进行精确、超快的分子筛分
影响因子：
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作者：
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