Layered double hydroxide polymer nanocomposites for water purification

Mallakpour, Shadpour; Behranvand, Vajiheh

doi:10.1016/b978-0-08-101903-0.00019-2

Cited by 9 publications

(13 citation statements)

References 68 publications

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“…The volume fraction of ZrO 2 in the hybrid materials (ϕ ZrO 2 ) is expressed by The values of w AcA and w ZrO 2 denote the weight fractions of AcA and ZrO 2 in purified BADGE-ZrO 2 NPs, respectively, and have been determined in the section on Characteristics of Epoxy-Modified ZrO 2 NPs. The density of ZrO 2 NPs was experimentally determined at 25 °C to be 5.2 g/cm 3 in a previous study. 32 The densities of the original epoxy resins have been determined based on the Archimedes liquid displacement method and listed in Table S3.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO₂ Nanoparticles

Enomoto

Kikuchi

Narumi

et al. 2018

ACS Appl. Mater. Interfaces

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Surface modifier-free hybridization of ZrO nanoparticles (NPs) with epoxy-based polymers is demonstrated for the first time to afford highly transparent and refractive bulk materials. This is achieved by a unique and versatile hybridization via the one-pot direct phase transfer of ZrO NPs from water to epoxy monomers without any aggregation followed by curing with anhydride. Three types of representative epoxy monomers, bisphenol A diglycidyl ether (BADGE), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate (CEL), and 1,3,5-tris(3-(oxiran-2-yl)propyl)-1,3,5-triazinane-2,4,6-trione (TEPIC), are used to produce transparent viscous dispersions. The resulting ZrO NPs are thoroughly characterized using dynamic light scattering (DLS), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), and solid-state C CP/MAS NMR measurements. The results from DLS and TEM analyses indicate nanodispersion of ZrO into epoxy monomers as a continuous medium. A surface modification mechanism and the binding fashion during phase transfer are proposed based on the FT-IR and solid-state C CP/MAS NMR measurements. Epoxy-based hybrid materials with high transparency and refractive index are successfully fabricated by heat curing or polymerizing a mixture of monomers containing epoxy-functionalized ZrO NPs and methylhexahydrophthalic anhydride in the presence of a phosphoric catalyst. The TEM and small-angle X-ray scattering measurements of the hybrids show a nanodispersion of ZrO in the epoxy networks. The refractive index at 594 nm ( n) increases up to 1.765 for BADGE-based hybrids, 1.667 for CEL-based hybrids, and 1.693 for TEPIC-based hybrids. Their refractive indices and Abbe's numbers are quantitatively described by the Lorentz-Lorenz effective medium expansion theory. Their transmissivity is also reasonably explained using Fresnel refraction, Rayleigh scattering, and the Lambert-Beer theories. This surface modifier-free hybridization provides a versatile, fascinating, and promising method for synthesizing a variety of epoxy-based hybrid materials.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO₂ Nanoparticles

Enomoto

Kikuchi

Narumi

et al. 2018

ACS Appl. Mater. Interfaces

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“…Layered double hydroxides (LDHs) have recently emerged as a useful material with a variety of applications in drug delivery, bio-imaging, biosensors, chemo-sensors, etc., because of their bio-degradable and biocompatible nature. Most recently, LDHs have been widely applied in water purification and environmental remediation [ 55 , 56 , 57 ]. Layered magnesium hydroxides or brucite has a chemical formula, [Mg(OH) 6 ], where the divalent Mg 2+ ions are surrounded by six OH − ions in an octahedral manner.…”

Section: Layered Double Hydroxidesmentioning

confidence: 99%

Nanomaterials for the Treatment of Heavy Metal Contaminated Water

et al. 2022

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Nanotechnology finds its application almost in every field of science and technology. At the same time, it also helps to find the solution to various environment-related problems, especially water contamination. Nanomaterials have many advantages over conventional materials, such as high surface area, both polar and non-polar chemistries, controlled and size-tunable, easier biodegradation, which made them ideal candidates for water and environmental remediation as well. Herein, applications of non-carbon nanomaterials, such as layered double hydroxides, iron oxide magnetite nanoparticles, nano-polymer composites, metal oxide nanomaterials and nanomembranes/fibers in heavy metal contaminated water and environmental remediation are reviewed. These non-carbon nanomaterials, due to their tunable unique chemistry and small size have greater potentials for water and environmental remediation applications.

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“…This property of LDHs acts as a stumbling block for some specific applications. To overcome this, surface modification, defects introduction, and building hybrid materials were common strategies reported in the literature . On the other hand, nanocomposites formed by incorporating layered inorganic materials like LDHs with polymers show remarkable changes in chemical and physical properties, , including high surface area, thermal and mechanical stability, and flexibility. , In the literature the use of MgAl-LDH for the removal of perchlorooctanoic acid, chromate, and phosphate ions proves that MgAl-LDH can be used as potent adsorbent for anionic species in native or hybrid form.…”

Section: Introductionmentioning

confidence: 99%

“… 7 There are lots of advanced functional materials used for the adsorption process. 8 − 10 Biodegradability and ample availability of various biomaterials attract researchers to utilize them as adsorbents. Sometimes these biosorbents are used directly or in a modified form.…”

Section: Introductionmentioning

confidence: 99%

“… 6 , 20 − 22 Layered double hydroxides (LDHs) have stacked layers with a positive charge and can act as an anion exchangers in the interlayer region. 4 , 8 , 9 , 23 − 25 High surface area and an ionic surface compared to other nanosize materials lead to thermodynamically unstable agglomeration of LDH. 26 This property of LDHs acts as a stumbling block for some specific applications.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional Cross-Linked Shrimp Waste-Derived Chitosan/MgAl-LDH Composite for Removal of As(V) from Wastewater and Antibacterial Activity

et al. 2023

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This work synthesized a novel chitosan-loaded MgAl-LDH (LDH = layered double hyroxide) nanocomposite, which was physicochemically characterized, and its performance in As(V) removal and antimicrobial activity was evaluated. Chitosan-loaded MgAl-LDH nanocomposite (CsC@MgAl-LDH) was prepared using cross-linked natural chitosan from shrimp waste and modified by Mg−Al. The main mechanisms predominating the separation of As(V) were elucidated. The characteristic changes confirming MgAl-LDH modification with chitosan were analyzed through Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis-differential thermal analysis, and Brunauer-Emmett-Teller measurements. Porosity and the increased surface area play an important role in arsenic adsorption and microbial activity. Adsorption kinetics follows the general order statistically confirmed by Bayesian Information Criterion differences. To understand the adsorption process, Langmuir, Freundlich, and Liu isotherms were studied at three different temperatures. It was found that Liu's isotherm model was the best-fitted model. CsC@ MgAl-LDH showed the maximum adsorption capacity of 69.29 mg g −1 toward arsenic at 60 °C. It was observed that the adsorption capacity of the material rose with the increase in temperature. The spontaneous behavior and endothermic nature of adsorption was confirmed by the thermodynamic parameters study. Minimal change in percentage removal was observed with coexisting ions. The regeneration of material and adsorption−desorption cycles revealed that the adsorbent is economically efficient. The nanocomposite was very effective against Staphylococcus aureus and Bacillus subtilus.

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Layered double hydroxide polymer nanocomposites for water purification

Cited by 9 publications

References 68 publications

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO₂ Nanoparticles

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO₂ Nanoparticles

Nanomaterials for the Treatment of Heavy Metal Contaminated Water

Multifunctional Cross-Linked Shrimp Waste-Derived Chitosan/MgAl-LDH Composite for Removal of As(V) from Wastewater and Antibacterial Activity

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Layered double hydroxide polymer nanocomposites for water purification

Cited by 9 publications

References 68 publications

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO2 Nanoparticles

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO2 Nanoparticles

Nanomaterials for the Treatment of Heavy Metal Contaminated Water

Multifunctional Cross-Linked Shrimp Waste-Derived Chitosan/MgAl-LDH Composite for Removal of As(V) from Wastewater and Antibacterial Activity

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Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO₂ Nanoparticles

Surface Modifier-Free Organic–Inorganic Hybridization To Produce Optically Transparent and Highly Refractive Bulk Materials Composed of Epoxy Resins and ZrO₂ Nanoparticles