The removal of uranium(VI) from aqueous solution by graphene oxide–carbon nanotubes hybrid aerogels

Abstract

Novel graphene oxide-carbon nanotubes (GOCNTs) hybrid aerogels were fabricated via a freeze-drying method using aqueous solutions of GO and CNTs. The resulting aerogels were characterized by scanning electron microscopy, X-ray diffraction, Fourier transformed infrared spectroscopy and thermal gravity analysis. The threedimensional GO-CNTs aerogels were used to remove uranium(VI) from aqueous solutions. The results showed that GO-CNTs aerogels had high removal ability to uranium(VI) and could be a promising sorbent for many environment applications.

High-Performance Amino-Functional Graphene/CNT Aerogel Adsorbent for Formaldehyde Removal from Indoor Air

“…4. G1N0 (VC) has been identified with the following functional groups: the strong peak at approximately 3400 cm -1 is attributed to the stretching vibration of -OH (Davis et al, 1999), the peak at 1618 cm -1 corresponds to the stretching vibration of the benzene ring C=C (Daifullah and Girgis, 2003;Ma et al, 2012), and the peaks at 918 and 1198 cm -1 correspond to the stretching vibrations of the alkoxy C-O and C-OH bonds, respectively (Gu et al, 2015). The IR spectrum of G1N0 shows a similar intensity for the -OH peak at approximately 3400 cm -1 when compared to the spectrum of G1N0 (VC), which indicates that GO has been reduced to a similar degree by VC and EDA.…”

A Zinc MOF with Carboxylate Oxygen‐Functionalized Pore Channels for Uranium(VI) Sorption

“…The uranium(VI) adsorption capacity is very low when pH value is larger than 6.5 or lower than 3. It should be noted that the oligomeric species, such as (UO 2 )(OH) + (UO 2 ) 2 (OH) 2 2+ , and (UO 2 ) 3 (OH) 5 + are dominated in the aqueous solution in the pH range of 6–8 . While the uranium exists predominantly as a UO 2 2+ in the aqueous solution when pH less than 5 .…”

Novel Ion-Imprinted Carbon Material Induced by Hyperaccumulation Pathway for the Selective Capture of Uranium

“…Mellah et al studied activated carbon for the adsorption of uranium­(VI) . Gu et al synthesized carbon nanotube aerogels for efficient uranium adsorption . Wang et al described the enrichment of U­(VI) by graphene oxide nanoribbons .…”

“…18 Gu et al synthesized carbon nanotube aerogels for efficient uranium adsorption. 19 al. described the enrichment of U(VI) by graphene oxide nanoribbons.…”