In:
International Journal of Materials Research, Walter de Gruyter GmbH, Vol. 114, No. 3 ( 2023-03-28), p. 191-198
Abstract:
Reduced graphene oxide/maghemite (RGO/γ-Fe 2 O 3 ) material was successfully synthesized by combining the modified Hummers method with co-precipitation (RGO 10 wt.%). γ-Fe 2 O 3 nanoparticles with a particle size of ∼14.8 nm were distributed on the surface of RGO sheets. Results of Brunauer–Emmett–Teller analysis showed that RGO/γ-Fe 2 O 3 had a mesoporous structure and a narrow capillary size distribution curve at about 13 nm. The specific surface area of the RGO/γ-Fe 2 O 3 was 168 m 2 ·g −1 . The RGO/γ-Fe 2 O 3 nanocomposite was used to adsorb arsenic As(V) and a mixture of heavy metals (As(V), Cr(VI), Pb(II), and Fe(III)) in water. The maximum adsorption efficiency of As(V) reached 98.9% after 45 min with an adsorption capacity of 5.93 mg·g −1 , higher than the simultaneous adsorption of the four metal ions. Competitive adsorption decreased in the order As(V), Cr(VI), Pb(II), and Fe(III). Therefore, RGO/γ-Fe 2 O 3 could be used as an effective adsorbent to remove heavy metals from aqueous solutions.
Type of Medium:
Online Resource
ISSN:
1862-5282
,
2195-8556
DOI:
10.1515/ijmr-2021-8612
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2023
detail.hit.zdb_id:
2232675-3
detail.hit.zdb_id:
2128058-7
detail.hit.zdb_id:
203021-4
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