Preparation of highly hydrophilic PVA/SBA-15 composite materials and their adsorption behavior toward cationic dye: effect of PVA content

Abid, Zakaria; Hakiki, Aboubakr; Boukoussa, Bouhadjar; Launay, Franck; Hamaizi, Hadj; Bengueddach, Abdelkader; Hamacha, Rachida

doi:10.1007/s10853-019-03415-w

Cited by 50 publications

(14 citation statements)

References 54 publications

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“…Figure 6 illustrates the loss tangent variation over a range of frequencies for various solid polymer electrolytes. It is obviously seen that the single relaxation peak is considered as a fingerprint of ionic conduction throughout the polymer body via segmental motion of the chains [ 74 , 75 ]. It is of great importance to interpret the loss tangent shape on the basis of the model of Koops phenomenological.…”

Section: Resultsmentioning

confidence: 99%

Studies of Circuit Design, Structural, Relaxation and Potential Stability of Polymer Blend Electrolyte Membranes Based on PVA:MC Impregnated with NH4I Salt

Nofal

Aziz

Brza³

et al. 2022

Membranes

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This work presents the fabrication of polymer electrolyte membranes (PEMs) that are made of polyvinyl alcohol-methylcellulose (PVA-MC) doped with various amounts of ammonium iodide (NH4I). The structural and electrical properties of the polymer blend electrolyte were performed via the acquisition of Fourier Transform Infrared (FTIR) and electrical impedance spectroscopy (EIS), respectively. The interaction among the components of the electrolyte was confirmed via the FTIR approach. Electrical impedance spectroscopy (EIS) showed that the whole conductivity of complexes of PVA-MC was increased beyond the addition of NH4I. The application of EEC modeling on experimental data of EIS was helpful to calculate the ion transport parameters and detect the circuit elements of the films. The sample containing 40 wt.% of NH4I salt exhibited maximum ionic conductivity (7.01 × 10−8) S cm−1 at room temperature. The conductivity behaviors were further emphasized from the dielectric study. The dielectric constant, ε’ and loss, ε’’ values were recorded at high values within the low-frequency region. The peak appearance of the dielectric relaxation analysis verified the non-Debye type of relaxation mechanism was clarified via the peak appearance of the dielectric relaxation. For further confirmation, the transference number measurement (TNM) of the PVA-MC-NH4I electrolyte was analyzed in which ions were primarily entities for the charge transfer process. The linear sweep voltammetry (LSV) shows a relatively electrochemically stable electrolyte where the voltage was swept linearly up to 1.6 V. Finally, the sample with maximum conductivity, ion dominance of tion and relatively wide breakdown voltage were found to be 0.88 and 1.6 V, respectively. As the ions are the majority charge carrier, this polymer electrolyte could be considered as a promising candidate to be used in electrochemical energy storage devices for example electrochemical double-layer capacitor (EDLC) device.

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Section: Resultsmentioning

confidence: 99%

Studies of Circuit Design, Structural, Relaxation and Potential Stability of Polymer Blend Electrolyte Membranes Based on PVA:MC Impregnated with NH4I Salt

Nofal

Aziz

Brza³

et al. 2022

Membranes

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show abstract

“… 9 − 12 In this sense, production optimization and lower cost techniques have been explored, including use of alternative silicon sources such as rice husk 13 , 14 or coal fly ash 15 and washing methods with environmentally friendly solvents to remove the template. 12 Additionally, the ability of SBA-15 to host a large series of functional groups by methods of cocondensation, isomorphic replacement, or grafting leads it to be a promising porous solid 10 that opens a tremendously valuable possibility of developing solids with very specific characteristics, for industrial applications related to adsorption processes 16 , 17 and membrane separation, 18 , 19 in pharmaceutical applications like drug delivery, 20 , 21 biosensing, 22 , 23 and for catalysis. 24 , 25 …”

Section: Introductionmentioning

confidence: 99%

Enthalpies of Immersion in Caffeine and Glyphosate Aqueous Solutions of SBA-15 and Amino-Functionalized SBA-15

et al. 2021

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Mesostructured silica SBA-15 and amino-functionalized silica SBA-15-NH 2 were synthesized, and then, characterization, adsorption capacity, and immersion enthalpies in caffeine and glyphosate on SBA-15 and SBA-15-NH 2 were evaluated. The enthalpy parameter was determined using a local construction Tian-type heat conduction calorimeter. Calorimetric studies in caffeine solutions exhibit negative enthalpy values; exothermic process characteristics for SBA-15 were between −13.90 and −194.06 J g –1 and those for SBA-15-NH 2 were between −7.22 and −60.34 J g –1 , and the adsorption capacity of caffeine was better in SBA-15 than that in SBA-15-NH 2 . In contrast, the enthalpies of immersion in glyphosate solutions were −5.06 to −56.2 J g –1 and the immersion of SBA-15-NH 2 in each solution generated enthalpy values of −9.06 to −41.2 J g –1 , but the adsorption capacity of glyphosate was better in the amino-functionalized SBA-15. The results show that functionalization of SBA-15 produced differences in physicochemical characteristics of solids, since energy and affinity for the calorimetric liquids are related to the surface properties of solids as well as the chemical nature of the target molecule, immersion enthalpy, was different.

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“…In this sense, several synthetic polymeric adsorbents have been used for the removal of organic dyes from contaminated matters [286][287][288]. Among these synthetic polymers investigated as adsorbents of organic dyestuffs, we can mention the use of PVA, and various composite materials based on PVA [289][290][291][292][293]. Conductive polymers have also been investigated to be effective adsorbents.…”

Section: Polymers In the Treatment Of Industrial Wastewatersmentioning

confidence: 99%

Recent Advances in Functional Polymer Materials for Energy, Water, and Biomedical Applications: A Review

et al. 2021

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Academic research regarding polymeric materials has been of great interest. Likewise, polymer industries are considered as the most familiar petrochemical industries. Despite the valuable and continuous advancements in various polymeric material technologies over the last century, many varieties and advances related to the field of polymer science and engineering still promise a great potential for exciting new applications. Research, development, and industrial support have been the key factors behind the great progress in the field of polymer applications. This work provides insight into the recent energy applications of polymers, including energy storage and production. The study of polymeric materials in the field of enhanced oil recovery and water treatment technologies will be presented and evaluated. In addition, in this review, we wish to emphasize the great importance of various functional polymers as effective adsorbents of organic pollutants from industrial wastewater. Furthermore, recent advances in biomedical applications are reviewed and discussed.

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Preparation of highly hydrophilic PVA/SBA-15 composite materials and their adsorption behavior toward cationic dye: effect of PVA content

Cited by 50 publications

References 54 publications

Studies of Circuit Design, Structural, Relaxation and Potential Stability of Polymer Blend Electrolyte Membranes Based on PVA:MC Impregnated with NH4I Salt

Studies of Circuit Design, Structural, Relaxation and Potential Stability of Polymer Blend Electrolyte Membranes Based on PVA:MC Impregnated with NH4I Salt

Enthalpies of Immersion in Caffeine and Glyphosate Aqueous Solutions of SBA-15 and Amino-Functionalized SBA-15

Recent Advances in Functional Polymer Materials for Energy, Water, and Biomedical Applications: A Review

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