Synthesis of sandwich-like Mn3O4@reduced graphene oxide nano-composites via modified Hummers' method and its application as uranyl adsorbents

Yingru Li; Tao Gai; Lang Shao; Hao Tang; Rui Li; Shanli Yang; Shaofei Wang; Qian Wu; Yiming Ren

doi:10.1016/j.heliyon.2019.e01972

Synthesis of sandwich-like Mn₃O₄@reduced graphene oxide nano-composites via modified Hummers' method and its application as uranyl adsorbents

Heliyon. 2019 Jun 22;5(6):e01972. doi: 10.1016/j.heliyon.2019.e01972. eCollection 2019 Jun.

Authors

Yingru Li¹, Tao Gai¹, Lang Shao¹, Hao Tang¹, Rui Li¹, Shanli Yang¹, Shaofei Wang¹, Qian Wu¹, Yiming Ren¹

Affiliation

¹ Institute of Materials, Chinse Academy of Engineering Physics, Mianyang, Sichuan province, 621700, China.

Abstract

Efficient and sustainable remediation technologies for uranium have recently been gaining more and more interest. Adsorption techniques are facile, effective and universal for kinds of heavy metal ions. In this paper, sandwich-like Mn₃O₄@reduced graphene oxide (Mn₃O₄@G) nano-composites were prepared facilely and greenly by adding NaOH solution into crude graphite oxide suspension prepared via the Hummers' method to modify the pH. The Mn₃O₄@G nanocomposites possess a reasonable maximum equilibrium adsorption quantity 195.6 mg [U] g^-1. Moreover, the magnetism of Mn₃O₄@G makes it easy to remove Mn₃O₄@G from water by strong magnet field.

Keywords: Chemical processing; Graphene; Materials science; Mn3O4@reduced graphene oxide nano-composites; Nuclear engineering; Sandwich-like; Uranyl adsorbents.