AI Article Synopsis

  • * This nanostructured photocatalyst has a favorable 1.7 eV bandgap, promoting electron movement while minimizing electron-hole recombination, leading to efficient decomposition of uranium-arsenazo iii complexes.
  • * The photocatalyst exhibits impressive performance, achieving nearly complete removal of hexavalent uranium in under 20 minutes from a high-concentration solution and maintains stability and reusability over multiple cycles.

Article Abstract

The photocatalytic degradation of uranium complexes is considered among the most efficient techniques for the efficient removal of uranium ions/complexes from radioactive wastewater. Described here is a nanostructured photocatalyst based on a cobalt-doped TiO composite with induced oxygen vacancies (Co@TiO-C) for the photocatalytic removal of uranium complexes from contaminated water. The synergy between oxygen vacancies and Co-doping produced a material with a 1.7 eV bandgap, while the carbon network facilitates electron movement and hinders the e-h recombination. As a result, the new photocatalyst enables the decomposition of uranium-arsenazo iii complexes (U-ARZ3), followed by photocatalytic reduction of hexavalent uranium to insoluble tetravalent uranium. Combined with the nanosheet structure's high surface area, the photocatalytic decomposition, reduction efficiency, and kinetics were significantly enhanced, achieving almost complete U(vi) removal in less than 20 minutes from solution with a concentration as high as 1000 mL g. Moreover, the designed photocatalyst exhibits excellent stability and reusability without decreasing the photocatalytic performance after 5 cycles.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9724698PMC
http://dx.doi.org/10.1039/d2na00467dDOI Listing

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