Spectroscopic studies on the temperature-dependent molecular arrangements in hybrid chitosan/1,3-β-D-glucan polymeric matrices

Gieroba, Barbara; Sroka-Bartnicka, Anna; Kazimierczak, Paulina; Kalisz, Grzegorz; Lewalska-Graczyk, Agnieszka; Vivcharenko, Vladyslav; Nowakowski, Robert; Pieta, Izabela S.; Przekora, Agata

doi:10.1016/j.ijbiomac.2020.05.155

Cited by 45 publications

(24 citation statements)

References 51 publications

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“…Moreover, the C1S peak of CS adsorbent is divided into three parts, at 284.59 eV, 286.06 eV and 288.30 eV (Fig.3-a). The peaks indicate the C-C, C-OH and O-C-O bonds, respectively; and these obtained values are exactly matched with available literature[26,27]. In addition, we can notice these peaks exist in both CS and PANI@CS.…”

supporting

confidence: 89%

Development of a New Hybrid Adsorbent Based on Polyaniline@Chitosan and Its Application to Acetaminophen Removal From Aqueous Solution

Daikh¹,

Benyoucef²,

Mouffok³

2022

Preprint

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The polyaniline (PANI) with chitosan (CS) (PANI@CS) was synthesized using in-situ polymerization process and its preparation was assured by surface area, XPS, TPD, XRD, FTIR, TGA and SEM analysis. PANI@CS, CS and PANI were used for the removal of acetaminophen (AAP). The maximum value of adsorption capacities were found to be 385.25 mg.g−1 for PANI@CS, 359.84 mg.g−1 for CS and 242.49 mg.g−1 for PANI which reveal that the adsorption capacity of hybrid adsorbent is major than CS and PANI respectively. Moreover, H–bonding, π–π bonding, pore-filling and chemisorption have been suggested as probable mechanism for the elimination of AAP by PANI@CS. Furthermore, AAP elimination was preferable at pH 7.0. Pseudo-second-order (PSO) and Langmuir models reported the kinetic and isotherm data acceptably. This shows that the adsorption processes of AAP are a monolayer chemical adsorption, and it was endothermic, spontaneous, and favorable for the three adsorbents. Moreover, when reused, the hybrid adsorbent remains at around 69% of their original capacities after five adsorption cycles.

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supporting

confidence: 89%

Development of a New Hybrid Adsorbent Based on Polyaniline@Chitosan and Its Application to Acetaminophen Removal From Aqueous Solution

Daikh¹,

Benyoucef²,

Mouffok³

2022

Preprint

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“…The results show that carbon, oxygen, nitrogen, and magnesium are present in the hybrid film. Two peaks exist in the O1s spectrum, and the peak at 531.5 eV is attributed to N–C–O chemical binding in N -acetylated-glucosamine units and the other peak, at 532.7 eV, is assigned to C–O, O–H or bound water [ 27 , 28 ]. The N1s XPs spectrum of the chitosan/magnesia nanocomposite film contains a peak at 399.1 eV that is attributed to the NH 2 or NH groups and another at 400.0 eV is associated with the amine groups in the ammonium form (NH 3 + ) [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

Heterogeneous Hybrid Nanocomposite Based on Chitosan/Magnesia Hybrid Films: Ecofriendly and Recyclable Solid Catalysts for Organic Reactions

2021

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Chitosan/magnesia hybrid films (CS-Mg) have been prepared via sol-gel process and employed as heterogeneous catalysts. An in situ generation of a magnesia network in the chitosan matrix was performed through hydrolysis/condensation reactions of magnesium ethoxide. The synthesized hybrid films were characterized using various analytical techniques, such as X-ray photo-electron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). The hybrid films display excellent catalytic activities in Michael and Knoevenagel reactions via one pot or solvent-free approaches under microwave irradiation conditions. Chitosan/magnesia hybrid films, catalysed pyrimidine, benzochromene, coumarin and arylidene-malononitriles derivatives formation reactions occurred with highly efficient yields of 97%, 92%, 86% and 95% respectively. Due to the fact that the films are durable and insoluble in common organic solvents, they were easily separated and can be recycled up to five times without a considerable loss of their catalytic activity.

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“…The signal at 287.6 eV was assigned to the C=O bonds of the acetylated portion of chitosan ( Figure 3 a). The signal at 286.1 eV was assigned to C–O and C–N, while the signal at 284.8 eV corresponded to C–C and C–H bonds [ 34 , 35 , 36 ]. The fourth signal at 283.4 eV is attributed to signals of carbon adsorbed on magnetite [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Arsenate Removal from Aqueous Media Using Chitosan-Magnetite Hydrogel by Batch and Fixed-Bed Columns

Verduzco-Navarro

Mendizábal

Rivera-Mayorga

et al. 2022

Gels

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The removal of arsenate ions from aqueous solutions at near-neutral pH was carried out using chitosan-magnetite (ChM) hydrogel beads in batch systems. Equilibrium isotherms and kinetic studies are reported. Obtained equilibrium and kinetic data were fitted to mathematical models, estimating model parameters by non-linear regression analysis. Langmuir model was found to best fit equilibrium data; a maximum adsorption capacity of 66.9 mg As/g was estimated at pH 7.0. Pseudo-first order kinetic model was observed to best fit kinetic data. The pH of the solution was observed to increase with increasing contact time, which is attributed to protonation of amine groups present in the hydrogel. Protonation of functional groups in the ChM sorbent yields a higher number of active sites for arsenate removal, being as this a process that can’t be overlooked in future applications of ChM hydrogel for the removal or arsenate ions. Chitosan-magnetite and ChM-arsenate interactions were determined by XPS. Arsenate removal using fixed-bed column packed with ChM was carried out, reporting a non-ideal behavior attributed to pH increase of the effluent caused by proton transfer to ChM hydrogels.

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Spectroscopic studies on the temperature-dependent molecular arrangements in hybrid chitosan/1,3-β-D-glucan polymeric matrices

Cited by 45 publications

References 51 publications

Development of a New Hybrid Adsorbent Based on Polyaniline@Chitosan and Its Application to Acetaminophen Removal From Aqueous Solution

Development of a New Hybrid Adsorbent Based on Polyaniline@Chitosan and Its Application to Acetaminophen Removal From Aqueous Solution

Heterogeneous Hybrid Nanocomposite Based on Chitosan/Magnesia Hybrid Films: Ecofriendly and Recyclable Solid Catalysts for Organic Reactions

Arsenate Removal from Aqueous Media Using Chitosan-Magnetite Hydrogel by Batch and Fixed-Bed Columns

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