Cellulose Nanofibril/Carbon Nanomaterial Hybrid Aerogels for Adsorption Removal of Cationic and Anionic Organic Dyes.
Nanomaterials (Basel)
; 10(1)2020 Jan 19.
Article
en En
| MEDLINE
| ID: mdl-31963846
Advances in nanoscale science and engineering are providing new opportunities to develop promising adsorbents for environmental remediation. Here, hybrid aerogels are assembled from cellulose nanofibrils (CNFs) and carbon nanomaterials to remove cationic dye methylene blue (MB) and anionic dye Congo red (CR) in single and binary systems. Two classes of carbon nanomaterials, carbon nanotubes (CNTs) and graphene nanoplates (GnPs), are incorporated into CNFs with various amounts, respectively. The adsorption, mechanics and structure properties of the hybrid aerogels are investigated and compared among different combinations. The results demonstrate CNF-GnP 3:1 hybrid exhibits the best performance among all composites. Regarding a single dye system, both dye adsorptions follow a pseudo-second-order adsorption kinetic and monolayer Langmuir adsorption isotherm. The maximal adsorption capacities of CNF-GnP aerogels for MB and CR are 1178.5 mg g-1 and 585.3 mg g-1, respectively. CNF-GnP hybrid show a superior binary dye adsorption capacity than pristine CNF or GnP. Furthermore, nearly 80% of MB or CR can be desorbed from CNF-GNP using ethanol as the desorption agent, indicating the reusability of this hybrid material. Hence, the CNF-GnP aerogels show great promise as adsorption materials for wastewater treatment.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Nanomaterials (Basel)
Año:
2020
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Suiza