Recently, Li Jiaxing's group at the Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, conducted a study on oxides of transition metal elements in order to obtain adsorbents with high selectivity and strong removal ability for radionuclides under acidic conditions. The WOx / C prepared by the solvothermal method achieves efficient removal of Sr (II) and Co (II). Relevant research findings have been published by ACS Sustainable Chemistry & Engineering.
W18O49 has many advantages such as uniform porosity, strong acid resistance, high thermal stability, low cytotoxicity, etc. Among them, the abundant oxygen vacancies existing on the surface of W18O49 can provide active sites for the immobilization and complexation of metal ions.In addition, Due to its loose spatial structure, the specific surface area of the material is large, which further increases its ability to fix metal ions. The experimental results show that the WOx / C can be realized The efficient enrichment of Sr (II) and Co (II) under acidic conditions, especially Co (II), can reach adsorption equilibrium in ten minutes.By studying the adsorption mechanism of oxygen on the surface of WOx / C The vacancy and the functional group CO play a key role in the complexation of metal ions.The preparation of WOx / C is simple and environmentally friendly, and has a large adsorption capacity for radionuclide ions and has broad prospects in the field of radioactive water pollution treatment.
