Facile synthesis of a sandwiched Ti3C2Tx MXene/nZVI/fungal hypha nanofiber hybrid membrane for enhanced removal of Be(II) from Be(NH2)2 complexing solutions
Facile synthesis of a sandwiched Ti3C2Tx MXene/nZVI/fungal hypha nanofiber hybrid membrane for enhanced removal of Be(II) from Be(NH2)2 complexing solutions
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轻松合成夹层 Ti3C2Tx MXene/nZVI/真菌菌丝纳米纤维杂化膜，用于增强从 Be(NH2)(2) 络合溶液中去除 Be(II)
DOI：
10.1016/j.cej.2021.129682
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发表时间：
2021-04-13
影响因子：
15.1
通讯作者：
Su, Changqing
中科院分区：
文献类型：
--
作者：
Chen, Runhua;Cheng, Yuying;Su, Changqing
二维金属碳化物或氮化物（MXenes）显示出各种优异的性能，然而，其差的渗透性阻碍了其在水处理中的应用。采用化学强化沉淀法制备了Ti 3C 2 Tx MXene/nZVI/真菌菌丝体杂化膜（MXene/nZVI@FH），用于铍氨络合物溶液中Be（II）的稳定捕集。有趣的是，MXene/nZVI@FH膜显示出良好的水渗透性（6.10 × 10（-15）m（2）），其比纯Ti 3C 2 Tx膜高约301倍，并且从具有极低浓度（19.85 ppm）的Be（NH 2）（2）络合溶液中捕获99.8%的Be（II）。具体地，在pH 5.0和35 ℃下，从Be（NH 2）（2）络合溶液中计算MXene/nZVI@FH的最大Be（II）吸附容量为95.20 mg/g。各种表征结果（例如，SEM、FTIR、XRD、VSM和XPS分析表明，Be（II）优先与MXene纳米片表面的氧基团配位，形成BeO和BeO 22-双齿内球配合物。此外，由于其网状夹层结构，MXene/ nZVI@FH可以通过用0.1 M HCl溶液浸出而容易地活化和重复使用。因此，它是一种很有前途的混合膜，用于从Be（NH 2）（2）络合溶液中去除和回收Be（II）。
Two-dimensional metal carbides or nitrides (MXenes) demonstrate various excellent properties; however, their poor permeability precludes their application in water treatment. In this study, Ti3C2Tx MXene/nZVI/fungal hyphae nanofiber hybrid membranes (MXene/nZVI@FH) were prepared by chemical-intensive precipitation method for the robust capture of Be(II) from a beryllium-ammonia complexing solution. Interestingly, the MXene/nZVI@FH membrane showed favorable water permeability (6.10 x 10(-15) m(2)), which was approximately 301 times higher than that of a pure Ti3C2Tx membrane, and 99.8% Be(II) was captured from the Be(NH2)(2) complexing solution with an extremely low concentration (19.85 ppm). Specifically, the maximum Be(II) adsorption capacity of MXene/nZVI@FH was calculated to be 95.20 mg/g from the Be(NH2)(2) complexing solution at pH 5.0 and 35 degrees C. Various characterization results (e.g., SEM, FTIR, XRD, VSM and XPS) suggested that Be(II) prefers to coordinate with surface oxygen groups bonded to the MXene nanosheets by forming BeO and BeO22- bidentate inner-sphere complexes. Furthermore, due to its reticular sandwiched structure, MXene/ nZVI@FH could be easily activated and reused by leaching with 0.1 M HCl solution. Thus, it is a promising hybrid membrane for the removal and recovery of Be(II) from a Be(NH2)(2) complexing solution.