Eco-friendly nano-hybrid superabsorbent composite from hydroxyethyl cellulose and diatomite

Mukerabigwi, Jean Felix; Lei, Shaojun; Fan, Lu; Wang, Haili; Luo, Shiying; Ma, Xiaoya; Qin, Jing; Huang, Xueying; Cao, Yu

doi:10.1039/c6ra01759b

Cited by 54 publications

(22 citation statements)

References 41 publications

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“…The signals generated at 3694 and 3621 cm −1 correspond to tension vibrations of Al-OH and Si-OH groups [39,40]. The strip appearing at 1631 cm −1 is related to the vibration of H-O-H due to the stretching and bending of adsorbed water on the surface of silica [41]. The intensity of the adsorption strip centered at 1025 cm −1 is due to O-Si-O stretching, in which silicon atoms are located in tetrahedral coordination [42].…”

Section: Characteristic Of Natural Diatomitementioning

confidence: 99%

Synthesis and Antibacterial Activity of (AgCl, Ag)NPs/Diatomite Hybrid Composite

et al. 2020

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. In the present research, hybrid (AgCl, Ag)NPs/diatomite composites were synthesized by direct impregnation with aqueous silver nitrate solutions. The silver chloride nanoparticles (AgCl-NPs) were formed as an effect of the exchange reaction when silver interacted with the diatomite mineral impurity halite. Nanoparticles of metallic silver (AgNPs) were created by the reduction of silver ions under the influence of hydrogen peroxide. The content of silver chloride nanoparticles in the (AgCl, Ag)NPs/diatomite composite was limited by the content of the halite in the used diatomite. Samples of natural diatomite and synthesized (AgCl, Ag)NPs/diatomite composites were examined by using scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, infrared spectroscopy and thermogravimetric analysis. Moreover, the antibacterial potential of synthesized composites was also studied using the MIC (minimal inhibitory concentration) method against the most common drug-resistant microorganisms in the medical field: Gram-positive Staphylococcus aureus and Gram-negative Klebsiella pneumoniae. The obtained hybrid (AgCl, AgNPs)/diatomite composites were shown to have antimicrobial potential. However, widespread use requires further study by using various microorganisms and additional cytotoxic studies on eukaryotic systems, e.g., cell lines and animal models.

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Section: Characteristic Of Natural Diatomitementioning

confidence: 99%

Synthesis and Antibacterial Activity of (AgCl, Ag)NPs/Diatomite Hybrid Composite

et al. 2020

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“…Furthermore, the OH-bond allows retaining the geometry of sheets with a thickness of <50 μm. Hydroxyethylcellulose has a very intense characteristic absorption band at 1065 cm −1 , which is assigned to the stretching vibrations of the − (COH) functional group [23]. A significant absorption band is observed at 1562 cm −1 in all the samples, reflecting the asymmetric stretching vibrations of COO groups.…”

Section: Resultsmentioning

confidence: 93%

Synthesis of solvent-free conductive and flexible cellulose–carbon nanohorn sheets and their application as a water vapor sensor

Selvam

Nakagawa

Marui

et al. 2020

Mater. Res. Express

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Carbon nanohorns (CNHs) are mixed with cellulose to make freestanding thin-film conductive sheets. CNHs, at different ratios (5, 10, 25, 50 wt%), form composites with cellulose (hydroxyethylcellulose). Freestanding cellulose-carbon nanohorn (CCN) sheets were fabricated using a 100 μm-thick metal bar coater. Surfactants or any other chemical treatments to tailor the surface properties of CNHs were avoided to obtain composite sheets from pristine CNHs and cellulose. Utilizing the hygroscopic property of hydroxyethylcellulose and the electrical conductivity of CNHs paved a path to perform this experiment. The synthesis technique is simple, and the fabrication and drying of the sheets were effortless. As the loading concentration of CNH increased, the resistance, flexibility, and strength of the CCN composite sheets decreased. The maximum loading concentration possible to obtain a freestanding CCN sheet is 50 wt%. The resistance of the maximum loading concentration of CNH was 53 kΩ. The response of the CCN sheets to water vapor was 4 s and recover time was 13 s, and it is feasible to obtain a response for different concentrations of water vapor. High-resolution transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, resistance measurement, tensile strength measurement, and thermogravimetric analysis were used to investigate the mechanical, morphological, electrical, and chemical properties of the CCN sheets.

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“…The FTIR spectrum of diatomite substrate displayed the main bands of amorphous opaline silica (SiO–H (3437 cm −1 ), H–O–H (1638 cm −1 ), symmetrical Si–O–Si (799 cm −1 ), and asymmetrical Si–O-Si (1,092 cm −1 and 465 cm −1 ) 21 (Fig. 1 B.A).…”

Section: Resultsmentioning

confidence: 99%

Enhanced decontamination of levofloxacin as toxic pharmaceutical residuals from water using CaO/MgO nanorods as a promising adsorbent

Abukhadra

Basyouny

AlHammadi

et al. 2020

Sci Rep

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Novel MgO/CaO nanocomposite (MgO/CaO NRs) was synthesized by the hydrothermal method using diatomite porous frustules as a substrate under the microwave irradiation. The composite appeared as well crystalline rod-like nanoparticles with 52.3 nm as average particle size and 112.8 m2/g as BET surface area. The synthetic MgO/CaO NRs were addressed as a novel adsorbent for promising removal of levofloxacin (LVX) as pharmaceutical residuals. The adsorption studies revealed effective uptake of levofloxacin by MgO/CaO NRs with theoretical qmax of 106.7 mg/g and the equilibrium time of 720 min considering the best pH value (pH 7). The equilibrium studies highly fitted with the Langmuir model of monolayer adsorption considering the values of Chi-squared (χ2) and determination coefficient. The estimated adsorption energy from Dubinin–Radushkevich (0.2 kJ/mol) signifies physisorption mechanisms that might be coulombic attractive forces considering the kinetic studies. The thermodynamic addressing for the reactions verified their spontaneous and exothermic nature within a temperature range from 303 to 333 K. Additionally, the prepared MgO/CaO NRs show significant recyclability properties to be used in realistic remediation process and its uptake capacity is higher than several studied adsorbents in literature.

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Eco-friendly nano-hybrid superabsorbent composite from hydroxyethyl cellulose and diatomite

Abstract: A high performance nano-hybrid superabsorbent composite was prepared through the graft polymerization of acrylic acid into hydroxyethyl cellulose backbone chains in the presence of diatomite clay as an inorganic nano-filler.

Cited by 54 publications

References 41 publications

Synthesis and Antibacterial Activity of (AgCl, Ag)NPs/Diatomite Hybrid Composite

Synthesis and Antibacterial Activity of (AgCl, Ag)NPs/Diatomite Hybrid Composite

Synthesis of solvent-free conductive and flexible cellulose–carbon nanohorn sheets and their application as a water vapor sensor

Enhanced decontamination of levofloxacin as toxic pharmaceutical residuals from water using CaO/MgO nanorods as a promising adsorbent

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