Pb (II) Adsorption Process of Fe3O4 Supported Ti3C2Tx

Ti3C2Tx MXene is a potential adsorbent of heavy metal ions due to its two-dimensional layered structure and abundant surface functional groups. However, it has disadvantages of limited layer spacing and poor stability in aqueous solution. Here, the modification strategy of Ti3C2Tx was explored to improve its chemical stability and ion adsorption capacity among which Fe3O4-Ti3C2Tx(FeMX) adsorbent with different doping amounts of Fe3O4 were prepared by one-step hydrothermal method. The results showed that the maximum theoretical Pb(II) adsorption capacity of FeMX adsorbent could reach 210.54 mg/g. Its adsorption mechanism was further revealed that Fe3O4 nanoparticles were evenly dispersed and intercalated between Ti3C2Tx nanosheets, which effectively increased specific surface area and layer spacing of Ti3C2Tx nanosheets, leading to improving Pb(II) removal ability. Therefore, this study provides a promising route for developing MXene matrix composites with excellent heavy metal ion adsorption properties.

Automated summary

Fe3O4-Ti3C2Tx (FeMX) adsorbent with different doping amounts of Fe3O4 was prepared by one-step hydrothermal method to improve the chemical stability and ion adsorption capacity of Ti3C2Tx. The maximum theoretical Pb(II) adsorption capacity of FeMX adsorbent was found to be 210.54 mg/g. The adsorption mechanism revealed that Fe3O4 nanoparticles were evenly dispersed and intercalated between Ti3C2Tx nanosheets, enhancing the specific surface area and layer spacing of Ti3C2Tx nanosheets and improving the ability to remove Pb(II). This study provides a promising route for developing MXene matrix composites with excellent heavy metal ion adsorption properties.