Ionic liquid assisted mesoporous silica-graphene oxide nanocomposite synthesis and its application for removal of heavy metal ions from water

Barik, Bapun; Kumar, Aniket; Nayak, Pratap S.; Achary, L. Satish K.; Rout, Lipeeka; Dash, Priyabrat

doi:10.1016/j.matchemphys.2019.122028

Cited by 67 publications

(21 citation statements)

References 74 publications

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“…Throughout the study of the adsorption process, the treatment of chitosan with the ILs was initially carried out, and three different adsorbents were obtained. The interaction between chitosan and the ILs may be attributed to the hydrogen bonds between the hydroxyls of the biopolymer and the ammonium group of the IL by noncovalent cation‐π or π‐π interactions as reported by several authors 35,37,47 . The adsorbents ChN, ChS, and ChT were characterized by FTIR, SEM, EDS, XRD, PSD, and RDD.…”

Section: Resultsmentioning

confidence: 76%

“…The interaction between chitosan and the ILs may be attributed to the hydrogen bonds between the hydroxyls of the biopolymer and the ammonium group of the IL by noncovalent cation-π or π-π interactions as reported by several authors. 35,37,47 The adsorbents ChN, ChS, and ChT were characterized by FTIR, SEM, EDS, XRD, PSD, and RDD. FTIR spectra ( Figure 2) showed differences regarding intensity in the O H symmetrical stretch at 3400 cm −1 and N H at 3250 cm −1 .…”

Section: Adsorbent Characterizationmentioning

confidence: 99%

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Functionalized chitosan with butylammonium ionic liquids for removal of Cr(VI) from aqueous solution

Eliodório

Pereira

Morandim-Giannetti

2020

J of Applied Polymer Sci

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Environmental pollution by heavy metals is currently a problem of great concern for human health. In this context, this study aims to contribute with the synthesis and characterization of chitosan functionalized with three different ionic liquids (n-butylammonium acetate, sec-butylammonium acetate, and tert-butylammonium acetate) followed by its application in hexavalent chromium effluent treatment. The adsorbents synthesized (ChN, ChS, and ChT) were characterized by SEM, EDS, FTIR, BET, RDD, PSD, and XRD techniques. Afterward, the influences of temperature, contact time, and pH on the Cr(VI) adsorption process were evaluated. The solution with pH 3 displayed the highest adsorption capacities (107.31, 104.60, and 107.97 mg.g-1 for ChN, ChS, and ChT, respectively). The kinetic data were better adjusted to the Weber-Morris kinetic model with an ideal time of 2 h. Furthermore, the influence of temperature was evaluated using the Freundlich and Langmuir isotherms, with maximum capacities of 142.05 (ChN), 131.58 (ChS), and 146.63 mg.g-1 (ChT). The adsorbent displayed enhanced adsorption properties in comparison with raw chitosan by an intensification of the electrostatic interaction between amino groups and hexavalent chromium. Finally, the reusability was investigated, and significant results were observed (84.33 ± 4.87%) in the adsorption process after 4 cycles.

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Section: Resultsmentioning

confidence: 76%

Section: Adsorbent Characterizationmentioning

confidence: 99%

Functionalized chitosan with butylammonium ionic liquids for removal of Cr(VI) from aqueous solution

Eliodório

Pereira

Morandim-Giannetti

2020

J of Applied Polymer Sci

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“…Recently, in order to improve the solubility and self-assembly properties and to keep graphene and its derivatives from clumping together, functionalization of the materials with immobilized nanomaterials, such as metal oxides, acting as insertions in between nanosheets has been worked on. [62][63][64] Fig. 1 (a) Scheme of the GO-TiO 2 composite film assembly and filtration processes.…”

Section: Carbon-based Functional Nanomaterialsmentioning

confidence: 99%

Nanocomposite-based high-performance adsorptive water filters: recent advances, limitations, nanotoxicity and environmental implications

Kamath

Mruthunjayappa

Mondal

et al. 2022

Environ. Sci.: Nano

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“…Some reports on the usage of ionic liquids are provided in Table 3. 1-butyl-3-methylimidazolium chloride Green solvent and porogen Ionic liquid assisted the development of π-π stacking and Van Der Waals interaction toward agglomeration of the grapheme oxide sheet Ionic liquid medium also acted as a porogen to create higher surface area of composite with better active site [107] Due to the high conductivity and insignificant vapor pressure of the ionic liquids, these materials are stable to be employed as an additive in mid-and high-temperature PEMFC [9]. Protic ionic liquids containing N and H atoms can form a hydrogen bond network initiating the Grotthuss mechanism of conductivity, which is superior to the vehicle mechanism.…”

Section: Ionic Liquidsmentioning

confidence: 99%

Ionic Liquid in Phosphoric Acid-Doped Polybenzimidazole (PA-PBI) as Electrolyte Membranes for PEM Fuel Cells: A Review

2021

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Increasing world energy demand and the rapid depletion of fossil fuels has initiated explorations for sustainable and green energy sources. High-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are viewed as promising materials in fuel cell technology due to several advantages, namely improved kinetic of both electrodes, higher tolerance for carbon monoxide (CO) and low crossover and wastage. Recent technology developments showed phosphoric acid-doped polybenzimidazole (PA-PBI) membranes most suitable for the production of polymer electrolyte membrane fuel cells (PEMFCs). However, drawbacks caused by leaching and condensation on the phosphate groups hindered the application of the PA-PBI membranes. By phosphate anion adsorption on Pt catalyst layers, a higher volume of liquid phosphoric acid on the electrolyte–electrode interface and within the electrodes inhibits or even stops gas movement and impedes electron reactions as the phosphoric acid level grows. Therefore, doping techniques have been extensively explored, and recently ionic liquids (ILs) were introduced as new doping materials to prepare the PA-PBI membranes. Hence, this paper provides a review on the use of ionic liquid material in PA-PBI membranes for HT-PEMFC applications. The effect of the ionic liquid preparation technique on PA-PBI membranes will be highlighted and discussed on the basis of its characterization and performance in HT-PEMFC applications.

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Ionic liquid assisted mesoporous silica-graphene oxide nanocomposite synthesis and its application for removal of heavy metal ions from water

Cited by 67 publications

References 74 publications

Functionalized chitosan with butylammonium ionic liquids for removal of Cr(VI) from aqueous solution

Functionalized chitosan with butylammonium ionic liquids for removal of Cr(VI) from aqueous solution

Nanocomposite-based high-performance adsorptive water filters: recent advances, limitations, nanotoxicity and environmental implications

Ionic Liquid in Phosphoric Acid-Doped Polybenzimidazole (PA-PBI) as Electrolyte Membranes for PEM Fuel Cells: A Review

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