Functional porous protein nanofibrils/polysaccharides aerogel beads for efficient dyes removal from water

TY - JOUR

T1 - Functional porous protein nanofibrils/polysaccharides aerogel beads for efficient dyes removal from water

AU - Dilamian, Mandana

AU - Montazer, Majid

AU - Yousefi, Hossein

AU - Otzen, Daniel E.

AU - Morshedi, Dina

N1 - Publisher Copyright: © 2024 RSC.

PY - 2024/6

Y1 - 2024/6

N2 - The rational design and fabrication of functional and feasible adsorbents with enhanced adsorption properties for pollutant removal remain challenging. Here, to achieve efficient adsorption of dyes, a radial-freezing technique was employed to develop freeze-dried bio-nanocomposites in the form of aerogel beads composed of cellulose nanofibers, protein nanofibers, and chitosan (CPCs). This strategy led to the formation of a spherical aerogel with a dandelion-like structure in the radial cross-section. FE-SEM micrographs of the aerogel beads revealed a highly porous morphology with a network of interconnected pores, allowing for the effective adsorption of liquids. The characterization results of the functional aerogel beads showed a remarkable ability to adsorb various cationic and anionic azo dyes. The maximum adsorption capacity of 1349.7 ± 34.36 mg g−1 and removal efficiency of nearly 100% in the initial 1000 mg L−1 Congo Red (CR) solution were obtained for CPCs aerogel beads. The resulting adsorption experimental data were fit by the sip isotherm and pseudo-second-order models. The porous structure of the CPCs aerogel bead enhanced the diffusion of dye molecules into the pores and inner surface. Furthermore, combined with the analysis results of FT-IR spectroscopy and XPS, multiple adsorption mechanisms (strong electrostatic interactions, hydrogen bonds, CH-π and π-π bonds) were ascribed between the CPCs composite and dye cations. It is believed that our CPCs aerogel beads can be regarded as a sustainable green bio-adsorbent for water remediation.

AB - The rational design and fabrication of functional and feasible adsorbents with enhanced adsorption properties for pollutant removal remain challenging. Here, to achieve efficient adsorption of dyes, a radial-freezing technique was employed to develop freeze-dried bio-nanocomposites in the form of aerogel beads composed of cellulose nanofibers, protein nanofibers, and chitosan (CPCs). This strategy led to the formation of a spherical aerogel with a dandelion-like structure in the radial cross-section. FE-SEM micrographs of the aerogel beads revealed a highly porous morphology with a network of interconnected pores, allowing for the effective adsorption of liquids. The characterization results of the functional aerogel beads showed a remarkable ability to adsorb various cationic and anionic azo dyes. The maximum adsorption capacity of 1349.7 ± 34.36 mg g−1 and removal efficiency of nearly 100% in the initial 1000 mg L−1 Congo Red (CR) solution were obtained for CPCs aerogel beads. The resulting adsorption experimental data were fit by the sip isotherm and pseudo-second-order models. The porous structure of the CPCs aerogel bead enhanced the diffusion of dye molecules into the pores and inner surface. Furthermore, combined with the analysis results of FT-IR spectroscopy and XPS, multiple adsorption mechanisms (strong electrostatic interactions, hydrogen bonds, CH-π and π-π bonds) were ascribed between the CPCs composite and dye cations. It is believed that our CPCs aerogel beads can be regarded as a sustainable green bio-adsorbent for water remediation.

UR - http://www.scopus.com/inward/record.url?scp=85201755371&partnerID=8YFLogxK

U2 - 10.1039/d4ma00380b

DO - 10.1039/d4ma00380b

M3 - Journal article

AN - SCOPUS:85201755371

SN - 2633-5409

VL - 5

SP - 7199

EP - 7221

JO - Materials Advances

JF - Materials Advances

IS - 18

ER -