A nanofiber with a p-t conjugated structure designed based on the Jahn-Teller effect for the removal of cupric tartrate from wastewater

作者：Li, Min; Zhang, Lin; Wang, Mingyue; Meng, Xiaojing^*; Shao, Penghui; Yang, Liming; Zhao, Chun; Cheng, Nianshou; Wang, Haichao^*

来源：Journal of Colloid and Interface Science, 2023, 650: 161-168.

DOI：10.1016/j.jcis.2023.06.195

• Adsorption
• Jahn-Teller distortion
• Cupric tartrate wastewater
• Nanofiber

Copper organic complexes with strong chemical stability and high solubility in water are difficult to eliminate with traditional adsorbents. In this work, a novel amidoxime nanofiber (AO-Nanofiber) with the p-t conjugated structure was fabricated through homogeneous chemical grafting coupled with electrospinning and applied to capture cupric tartrate (Cu-TA) from aqueous solutions. The adsorption capacity of Cu-TA by AO-Nanofiber was 198.4 mg/g at an equilibrium time of 40 min, and the adsorption performance remains basically unchanged after 10 times adsorption-desorption cycles. The capture mechanism of Cu-TA by AO-Nanofiber was jointly validated by experiments and characterization such as Fourier Transform Infrared Spectrometer (FT-IR), X-ray Photo-electron Spectroscopy (XPS), and Density functional theory (DFT) calculations. These results demonstrated that the lone pair of electrons of the N atom from the amino groups and the O atom from hydroxyl groups in the AO-Nanofiber is partially transferred to the 3d orbital of the Cu(II) ions in Cu-TA, leading to the Jahn-Teller distortion of the Cu-TA and the more stable structure of AO-Nanofiber@Cu-TA was generated.

• 单位
  重庆大学; 南昌航空大学