Ultrahigh-flux and dye-separation membranes based on MXene-EDA (Ti3C2Tx) nanosheets

作者：Ding, Xin; Sun, Tiangao; Xing, Ying; Hou, Shili^*; Hou, Shifeng^*

来源：Inorganic Chemistry Communication, 2023, 158: 111358.

DOI：10.1016/j.inoche.2023.111358

• MXene
• EDA
• Composite membrane
• Ultrahigh flux
• Dye separation

A novel membrane was created by utilizing a crosslinked Ti3C2Tx (MXene)/ethylenediamine (EDA) composite prepared through a hydrothermal method. The membrane exhibited remarkable properties, including high water flux (similar to 163.53 L m(-2) h(-1).bar(-1), almost twice as much as the pristine MXene membrane) and excellent dye rejection, particularly for methylene blue (MB), with 100 % rejection in the first cycle. The N-Ti coordination bond formation was responsible for increasing the layer thickness of the membrane(pre-(6.4 mu m) and post-(9.4 mu m) modification), which improved dye selectivity. Notably, trivalent anions and cationic compounds had a significant impact on the water flux of the MXene-EDA membrane. The cationic compounds demonstrated a positive influence, while the anions had the opposite effect.

• 单位
  山东大学; 桂林理工大学