TEMPO-oxidized cellulose beads for cationic dye adsorption

Wang, Qianqian; Liu, Simeng; Chen, Honglei; Li, Jun; Zhu, Qianqian

doi:10.15376/biores.17.4.6056-6066

Cited by 10 publications

(9 citation statements)

References 26 publications

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“…The coefficient of determination of the pseudo-first-order rate constant K 1 was calculated to be greater than that of the pseudo-second-order kinetic constant K 2, and the opposite was true for q e . This phenomenon was similar to other literature reports ( Wang et al, 2022 ). Moreover, the R 2 values of the pseudo second-order kinetic model were higher than those of the pseudo first-order kinetic model, indicating that the pseudo-second order model was better suited to describe the kinetics of MB dye adsorption on hydrogels ( Figures 7A, B ).…”

Section: Resultssupporting

confidence: 93%

Enhanced hybrid hydrogel based on wheat husk lignin-rich nanocellulose for effective dye removal

Huang

Xu²,

Кузнецов³

et al. 2023

Front. Bioeng. Biotechnol.

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Polyvinyl alcohol (PVA) hydrogels were enhanced mechanically through the addition of lignin-rich nanocellulose (LCN), soluble ash (SA) and montmorillonite (MMT) for dye removal. The hybrid hydrogels reinforced with 33.3 wt% of LCN had a 163.0% increase in storage modulus as compared to the PVA/0LCN-33.3SM hydrogel. LCN can be added to the PVA hydrogel to alter its rheological properties. Additionally, hybrid hydrogels were highly efficient in removing methylene blue from wastewater, which was attributed to the synergistic effects of the PVA matrix supporting embedded LCN, MMT, and SA. The adsorption time (0–90 min) showed that the hydrogels containing MMT and SA had high removal efficiency, and the adsorption of methylene blue (MB) by PVA/20LCN-13.3SM was greater than 95.7% at 30°C. It was found that MB efficiency decreased with a high MMT and SA content. Our study provided a new method for the fabrication of polymers-based eco-friendly, low-cost and robust physical hydrogels for the MB removal.

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Section: Resultssupporting

confidence: 93%

Enhanced hybrid hydrogel based on wheat husk lignin-rich nanocellulose for effective dye removal

Huang

Xu²,

Кузнецов³

et al. 2023

Front. Bioeng. Biotechnol.

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“…Various studies have reported the absorption of cationic dyes by anionic IPNs, containing weakly acidic or strongly charged groups. The combination of electrostatic interactions with hydrophobic interactions is usually the driving force in the case of cationic species [ 56 ].…”

Section: Resultsmentioning

confidence: 99%

An Interpenetrating Polymer Network Hydrogel Based on Cellulose, Applied to Remove Colorant Traces from the Water Medium: Electrostatic Interactions Analysis

et al. 2022

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The main objective of this work was the removal of eosin Y and green malachite from an aqueous medium by using a cellulose-based biodegradable interpenetrated network (IPN). The IPN was obtained by the sequenced synthesis method. In the first step, cellulose was crosslinked with epichlorohydrin (ECH). In the second step, the obtained gels were swollen in a reactive mixture solution, which was based on the monomers 2-hydroxyethyl methacrylate (HEMA) and 1,6- hexanediol diacrylate (HDDA). After this, swelling equilibrium was reached through the gels’ exposition to UV radiation. An infrared spectroscopy (FTIR) was used to analyze the bond stretching, which confirmed the IPN’s formation. The swelling kinetics in aqueous mediums with different pH values showed a high swelling at a basic pH value and a low response in neutral and acidic media. The IPNs showed an improvement in water uptake, compared to the networks based on PHEMA or cellulose. The IPN was used to remove dyes from the water. The results showed that a high percentage of green malachite was removed by the IPN in six minutes of contact time. The experimental results were confirmed by the docking/modeling method of the system (IPN/Dye). The different physical interactions between the IPN and the dyes’ molecules were investigated. The interactions of the hydrogen bonds with malachite green were stronger than those with eosin Y, which was in good agreement with the experimental results.

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“…The most noticeable feature in the oxidised sample (C1-TEMPO and C2-TEMPO) FTIR spectra stipulate a particular functional group inaugurate during the modification procedure. The peak appeared in both C1-TEMPO and C2-TEMPO at 1605 cm -1 shows stretching vibration of carbonyl group (C=O) which signifies the D-glucose unit hydroxymethyl group that has provenly converted to carboxyl group (-COOH) in their acidic form Wang et al 2022). Through TEMPOmediated oxidation, the emergence of this change can be attributed to the oxidation process acting on the primary hydroxyl (-OH) groups inherent in the cellulose polymer (Coseri et al 2015;Hirota et al 2010;Okita et al 2010).…”

Section: Molecular Weight (M η ) and Degree Of Polymerization (Dp)mentioning

confidence: 99%

“…Through TEMPOmediated oxidation, the emergence of this change can be attributed to the oxidation process acting on the primary hydroxyl (-OH) groups inherent in the cellulose polymer (Coseri et al 2015;Hirota et al 2010;Okita et al 2010). With the existence of carboxyl group (-COOH), cellulose with TEMPO modification can enhance the hydrophilicity and water absorption capacity for both TEMPO-modified celluloses (Baron;Coseri, 2020;Wang et al 2022). In contrast to the raw samples, C1-TEMPO and C2-TEMPO show intensity strengthening for both sample which propose the bond enhancing or additional functional group throughout the modification.…”

Section: Molecular Weight (M η ) and Degree Of Polymerization (Dp)mentioning

confidence: 99%

The dispersibility of Cellulose I and Cellulose II by tempo-mediated oxidation

Ghazali,

Salleh,

Jafri

et al. 2024

CERNE

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Background:The restricted dispersibility of cellulose in water has grown to be a significant problem which is a key step in making cellulose soluble in water and common solvent. To overcome the obstacle, cellulose structure is being modified to improve the surface properties and the utilization of the cellulose itself. In this study, cellulose I and cellulose II were examined after treated with watersoluble 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO). The hydrogen bond between chains and the crystallinity of the cotton linter (cellulose I) was first broken by NaOH/urea. Then, cellulose I and NaOH/urea-treated cellulose (cellulose II) were oxidized with sodium chlorite, sodium bromide, and TEMPO in a catalytic amount. Results:The success of oxidation is achieved when both cellulose I and II treated with TEMPO had preferentially converted the hydroxyl groups to carboxylate groups through Fourier Transform Infrared Spectrometer (FTIR). Besides, through X-ray diffraction analysis, cellulose I and II exhibited a decreased in the crystallinity. The scattered structure revealed through morphology analysis proved that cellulose treated with TEMPO had resulted in a more dispersed and separated cellulose fibre structure. Conclusion:The result showed, cellulose has been successfully modified using TEMPO-mediated oxidation with improved dispersion properties. The scattered structure revealed through morphology analysis proved that cellulose treated with TEMPO had resulted in a more dispersed and separated cellulose fibre structure. High cellulose dispersion ability will allow the manufacturing process of hydrogel, film and fibre to be much easier and faster. This is necessary for creating novel, environmentally friendly materials for various applications across numerous industries and future research anticipated to increase.

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TEMPO-oxidized cellulose beads for cationic dye adsorption

Cited by 10 publications

References 26 publications

Enhanced hybrid hydrogel based on wheat husk lignin-rich nanocellulose for effective dye removal

Enhanced hybrid hydrogel based on wheat husk lignin-rich nanocellulose for effective dye removal

An Interpenetrating Polymer Network Hydrogel Based on Cellulose, Applied to Remove Colorant Traces from the Water Medium: Electrostatic Interactions Analysis

The dispersibility of Cellulose I and Cellulose II by tempo-mediated oxidation

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