In-situ Growth of Tubular MoS2 Membrane on Ceramic Tube with Improved Organic Solvent Nanofiltration Performances.
In-situ Growth of Tubular MoS2 Membrane on Ceramic Tube with Improved Organic Solvent Nanofiltration Performances.
复制标题
在陶瓷管上原位生长管状 MoS2 膜，提高有机溶剂纳滤性能。
DOI：
10.1039/d1qm00104c
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Hongxia Guo
中科院分区：
文献类型：
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作者：
Tongtong Liu;Zhenping Qin;Qiaohong Liu;Xuejian Li;Yue Liu;Quan-Fu An;Hongxia Guo
二硫化钼（MoS2）作为一种独特特性的二维过渡金属二硫属化物，由于其良好的分离性能和稳定性，已成为有机溶剂纳滤（OSN）很有前途的膜材料。本工作通过原位水热法制备了MoS2管式陶瓷膜，在有机溶剂中表现出良好的稳定性。 MoS2层的3D纳米花状结构赋予改性膜优异的OSN性能。分离伊文思蓝（EB）的甲醇溶液，甲醇通量为403.1 L m−2 h−1 MPa−1，EB的截留率为98.1%。利用密度泛函理论评估了MoS2/Al2O3表面的粘附结构，得到了3.2 Å的界面距离。考虑到范德华力之外的非键 S-O 相互作用，MoS2 层和陶瓷基板之间的粘附功 (0.55 J m−2) 和电荷转移过程表明具有良好的稳定性。 MoS2管式陶瓷膜在DMF有机溶剂中错流运行80 h后仍保持分离稳定性。
As a unique characteristic two-dimensional transition metal dichalcogenide, molybdenum disulfide (MoS2) has become a promising membrane material for organic solvent nanofiltration (OSN) due to its good separation performance and stability. In this work, an MoS2 tubular ceramic membrane is prepared via an in situ hydrothermal method, exhibiting quite good stability in organic solvent. The 3D nanoflower-like structure of the MoS2 layer endows the modified membrane with an excellent OSN performance. With separation of a methanol solution of Evans blue (EB), the methanol flux was 403.1 L m−2 h−1 MPa−1 and the rejection of EB was 98.1%. The adhesion structures at the surface of MoS2/Al2O3 were evaluated using density functional theory, and an interfacial distance of 3.2 Å was obtained. Considering non-bond S–O interactions in addition to van der Waals forces, the work of adhesion (0.55 J m−2) and charge transfer process between the MoS2 layer and the ceramic substrate indicate good stability. The MoS2 tubular ceramic membrane maintains separation stability after performing in organic solvents of DMF for 80 h under cross-flow.