Scientists design and synthesize zirconia / graphene composite

Recently, Chen Changlun, research group of applied plasma research office, Institute of plasma physics, Hefei Institute of material science, Chinese Academy of Sciences, designed and synthesized zirconia / graphene composite materials to achieve high-efficiency enrichment of re (VII) The research was published in ACS Sustainable Chemistry & Engineering Zirconia not only has the characteristics of large specific surface area and uniform pore size of mesoporous materials, but also has acid and alkaline surface center, which is easy to produce oxygen vacancy, so it has good adsorption performance, and has a broad application prospect in sewage treatment Zirconia has both square cell structure and monoclinic cell structure Through theoretical calculation, the researchers of Chen Changlun's research group found that the binding energy of re (VII) with square cell structure is larger and more stable than that of monoclinic cell structure By loading zirconia on graphene, the monoclinic cell structure of zirconia is transformed into orthorhombic cell structure, and the synergistic enrichment effect of zirconia and graphene is formed, so the enrichment ability of zirconia / graphene composite for re (VII) is greatly enhanced Rhenium, as an element in the VIIB group with technetium, has similar chemical properties with technetium, and is often used as a non radioactive analogue element of technetium Therefore, zirconia / graphene composite can be used to enrich and reduce high valence soluble TC (VII), so as to control radioactive TC (VII) pollution.