Graphene nickel silica supported nanocomposites as an efficient purifier for water treatment

Alramadhan, Safiah A.; Hammud, Hassan H.

doi:10.1007/s13204-020-01580-y

Cited by 8 publications

(8 citation statements)

References 58 publications

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“…Niphen complexes, when pyrolyzed under nitrogen, are expected to act as a catalyst for the preparation of nickel graphite nanocarbon as found in the case of the pyrolysis of Ni(2,2bipyridine)Cl 2 . H 2 O [16]. Thus, in this present work, we have synthesized four nickel phenanthroline complexes by using the three-layer diffusion method with varying nickel salt, solvent nature and a mole ratio of nickel ion to phen ligand.…”

Section: Introductionmentioning

confidence: 99%

Structures, Characterization and DFT Studies of Four Novel Nickel Phenanthroline Complexes

et al. 2023

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Four Ni–phen complexes were prepared and characterized by FTIR and thermal analysis. The X-ray structure determination shows that the geometry around NiII ions in complexes 1, [Ni(phen)2(H2O)(ONO2)](NO3); 2, [Ni(phen)2(H2O)Cl]Cl; 3, [Ni(phen)(CH3CN)(ONO2)(O2NO)] and 4, [Ni(phen)3](NO3)2.H2O.C2H5OH is considerably distorted octahedral. The coordination core geometries in 1, 2, 3 and 4 are NiN4O2, NiN4OCl, NiN3O3 and NiN6, respectively. The crystal packing and crystal supramolecularity analysis of the complexes reveal the importance of aryl∙∙∙aryl interactions, and both offset face-to-face (OFF) and edge-to-face (EF) motifs are dominant. Hydrogen bonding interactions in these structures reinforce aryl∙∙∙aryl interactions. FTIR proved the coordination of M-N and M-Cl as well as the presence of nitro groups in the complexes, while thermal analysis revealed that the loss of water, chloro and nitro groups occurred before the degradation of phenanthroline ligand in the complexes. DFT study indicates that a strong correlation exists among theoretical and experimentally determined geometric parameters with distorted octahedral geometry. The charge density in HOMO is localized on the metal halogen bond and nitrate group (NO3−), whereas the LUMO cloud density is mainly distributed on the phen ring, which indicates the electroactive nature of the ring.

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Section: Introductionmentioning

confidence: 99%

Structures, Characterization and DFT Studies of Four Novel Nickel Phenanthroline Complexes

et al. 2023

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“…In order to examine the mechanism of the adsorption process, a suitable kinetic model is needed to analyze rate data. Three models (Yoon and Nelson, Thomas, and Yan et al) [8][9][10][11][12][13][14]25,37] were used to analyze the column performance for the removal of MG from an aqueous solution. The Thomas kinetic model assumes that the process follows Langmuir kinetics of adsorption-desorption with no axial dispersion [53].…”

Section: Adsorption In a Fixed Bed Columnmentioning

confidence: 99%

“…Recently several types of adsorbents were studied for the removal of cationic organic dyes, such as methylene blue using modified marine algae Carolina [7], crystal violet by modified Khalas dates residues [8], malachite green by hydrothermally carbonized pine needles [9] and by cobalt carbon nanostructures [10]. Crystal violet by cobalt-carbon/silica nanocomposites [11][12][13] and crystal violet and methylene blue by graphene-nickel silica [14]. In comparison, the anionic methyl orange dye was successfully removed from water by cobalt-carbon/silica nanocomposites [13].…”

Section: Introductionmentioning

confidence: 99%

Removal of Malachite Green Using Hydrochar from PALM Leaves

Hammud,

Hammoud,

Hussein

et al. 2023

Sustainability

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Biochar was prepared by the hydrothermal carbonization (HTC) of palm leaves, characterized, and utilized as an adsorbent for Malachite Green dye (MG). The Higher Heating Value (HHV) of biochar depends on the carbonization temperature and has a maximum value of 24.81 MJ/kg. Activation using H2O2 oxidation of HTC biochar prepared at 208 °C produced AHTC with improved capacity. The optimum pH was found to be in the range 7–8. Freundlich, Langmuir, Temkin, and Dubinin–Radushkevich adsorption isotherms were used to study MG adsorption data. The Langmuir isotherm provided the best fit for experimental data. Experiments conducted using activated biochar AHTC at 25 °C resulted in an adsorption capacity of 62.80 mg/g, far greater than what was observed for HTC biochar (45.59 mg/g). The maximum adsorption capacity was 88% when the concentration of MG solution was 66 ppm. The free energy change in adsorption DG° indicated that the adsorption process was spontaneous. Adsorption followed pseudo-second-order kinetics. Fixed-column adsorptions models, namely, Thomas, Yan et al. and Yoon–Nelson models, were investigated for AHTC. The column adsorption capacity determined by the Thomas model was 33.57 mg/g. In addition, a computational investigation has been carried out to determine the structural and electronic features, as well as the quantum chemical parameters of HTC and MG. Moreover, the interaction between the HTC and MG is investigated, which is further elaborated by performing non-covalent interaction (NCI) through the reduced density gradient (RDG) analysis. Thus, the easily prepared hydrochar from abundant waste palm leaves can be used as a high-value biocoal and efficient adsorbent of the cationic dye malachite green.

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“…In the case of GO, various oxygen functional groups, such as carbonyl groups (C=O), carboxyl groups (–COOH), and hydroxyl groups (–OH), are combined so that the dispersion is stable in aqueous solutions and organic solvents. Additionally, since it is possible to develop a variety of properties that polymer materials do not have when used with other polymer materials, such studies are ongoing [ 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide and Carbon Nanotubes-Based Polyvinylidene Fluoride Membrane for Highly Increased Water Treatment

et al. 2021

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As contaminated water increases due to environmental pollution, the need for excellent water treatment is increased, and several studies have reported the polyvinylidene fluoride (PVDF)-based water treatment membranes. However, the PVDF membrane has several problems such as low filtration performance, fouling resistance, and difficulty in precisely controlling the morphology of the pores and hydrophilicity. Therefore, we newly produced a water treatment PVDF membrane containing graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs) to improve the filtration performance. Surface properties of the fabricated membrane such as morphology, and size of pores, hydrophilicity, and water flux of the membrane were investigated. Additionally, the performance of these membrane filters was evaluated for free residual chlorine, turbidity, chromaticity, magnesium, sulfate, and particulates class 1 according to drinking water management act criteria, respectively. A performance improvement of at least 108.37% was observed compared to the Pure PVDF filter module and anti-fouling effects due to the functional groups of GO and MWCNTs. These results reveal that proposed membrane can accelerate the development of various water filtration applications.

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Graphene nickel silica supported nanocomposites as an efficient purifier for water treatment

Cited by 8 publications

References 58 publications

Structures, Characterization and DFT Studies of Four Novel Nickel Phenanthroline Complexes

Structures, Characterization and DFT Studies of Four Novel Nickel Phenanthroline Complexes

Removal of Malachite Green Using Hydrochar from PALM Leaves

Graphene Oxide and Carbon Nanotubes-Based Polyvinylidene Fluoride Membrane for Highly Increased Water Treatment

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