Jump to main content
Jump to site search


Enhanced photocatalytic reduction activity of uranium(VI) from aqueous solution using the Fe2O3–graphene oxide nanocomposite

Author affiliations

Abstract

Photocatalytic technologies are a potential solution for remediation of radioactive wastewater, including the reduction of radioactive hexavalent uranium, which is commonly found in wastewater from the nuclear industry. In this study, Fe2O3–graphene oxide composites were synthesized by an easy and scalable impregnation method as a catalyst for the reduction of U(VI). X-ray photoelectron spectroscopy analysis and high-resolution transmission electron microscopy images of this composite clearly showed that the Fe2O3 nanoparticles exist in the layered structure of graphene oxide. The photocatalytic activity of the Fe2O3–graphene oxide composite was evaluated by the reduction of U(VI) to U(IV) in aqueous solution under visible light. The results showed that the photocatalytic process of the Fe2O3–graphene oxide composite was always faster than that of the Fe2O3 nanoparticles. Moreover, the experimental kinetic data for the catalytic process followed a pseudo-first-order model. The stability of the Fe2O3–graphene oxide composites was studied over successive experiments, with the photocatalytic reduction efficiency of U(VI) decreasing to 76.0% after four cycles. Based on these experimental results, the enhanced photocatalytic activity and stability of Fe2O3–graphene oxide composites can be attributed to the improved adsorption properties of U(VI) at GO and the electron transfer from iron oxide to GO.

Graphical abstract: Enhanced photocatalytic reduction activity of uranium(vi) from aqueous solution using the Fe2O3–graphene oxide nanocomposite

Back to tab navigation

Publication details

The article was received on 20 Jul 2017, accepted on 18 Aug 2017 and first published on 21 Aug 2017


Article type: Paper
DOI: 10.1039/C7DT02639K
Citation: Dalton Trans., 2017, Advance Article
  •   Request permissions

    Enhanced photocatalytic reduction activity of uranium(VI) from aqueous solution using the Fe2O3–graphene oxide nanocomposite

    Y. Guo, Y. Guo, X. Wang, P. Li, L. Kong, G. Wang, X. Li and Y. Liu, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT02639K

Search articles by author

Spotlight

Advertisements