Magnetic nanocomposite based on montmorillonite, Fe oxides, and hydrothermal carbon: Synthesis, characterization and pollutants adsorption tests

Soulé, M.E. Zelaya; Barraqué, Facundo; Morantes, César Fernández; Flores, Federico Manuel; Fernández, Mariela Alejandra; Sánchez, Rosa M. Torres; Montes, María Luciana

doi:10.1016/j.mtla.2020.100973

Cited by 10 publications

(7 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, both two samples present similar type V isotherm with H1 hysteresis loop of the IUPAC classification (Figure S2c,d), 65 corresponding to a weak adsorbent−adsorbate interaction behavior that is typical of porous adsorption materials and capillary condensation in mesopores structures, which is usually observed at agglomerates in a reasonably regular order. 66,67 Based on the characterization results vide supra, it can be proved that the polypyrrole-derived shells could be successfully coated on ATP clay via the bridging and bonding strategy.…”

Section: Structural Characterization Of the Samplesmentioning

confidence: 99%

Selective Adsorbent Design with Multifunctional Surfaces: Innovating Solutions for Heterogeneous Catalysis in Water

Wang,

Liang,

Liu

et al. 2024

Langmuir

View full text Add to dashboard Cite

Heterogeneous catalytic systems with water as the solvent often have the disadvantage of cross-contamination, while concerns about the purification and workup of the aqueous phase after reactions are rare in the lab or industry. In this context, designing and developing the functional selective solid adsorbent and revealing the adsorption mechanism can provide a new strategy and guidelines for constructing supported heterogeneous catalysts to address these issues. Herein, we report the stable composite adsorbent (Fe/ATP@PPy: magnetic Fe 3 O 4 /attapulgite with the polypyrrole shell) that features an integrated multifunctional surface, which can effectively tune the selective adsorption processes for Cu 2+ , Co 2+ , and Ni 2+ ions and nitrobenzene via the cooperative chemisorption/physisorption in an aqueous system. The adsorption experiments showed that Fe/ATP@PPy displayed significantly higher adsorption selectivity for Ni 2+ than Cu 2+ and Co 2+ ions, especially which exhibited an approximate 100.00% removal for both Ni 2+ ions and nitrobenzene in the mixture system with a low concentration. Furthermore, combined tracking adsorption of Ni 2+ ions and X-ray photoelectron spectroscopy characterization confirmed that the effective adsorption occurs via ion transfer coordination; the pathway was further validated at the molecular level through theoretical modeling. In addition, the selective adsorption mechanism was proposed based on the adsorption experiment, characterization, and the corresponding density functional theory calculation.

show abstract

Section: Structural Characterization Of the Samplesmentioning

confidence: 99%

Selective Adsorbent Design with Multifunctional Surfaces: Innovating Solutions for Heterogeneous Catalysis in Water

Wang,

Liang,

Liu

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated that the composite of MMT and magnetic materials can enhance the saturation magnetization (Ms) and heighten the contrast signal of T2-weighted MRI. [139,140] Therefore, to further optimize the therapeutic effect, CTABmodified MMT has also been used as a magnetic composite loaded with FePt NPs and then FePt@MMT nanocomposites with different magnetic properties are fabricated using one-pot method by regulating the proportion of MMT (Figure 12c). [141] CTAB-modified MMT offers the anchor sites for the nucleation growth of FePt NPs.…”

Section: Multifunctional Applications Of Lcmmentioning

confidence: 99%

Layered Clay Minerals in Cancer Therapy: Recent Progress and Prospects

Xie

Chen

Yang

2023

Small

View full text Add to dashboard Cite

Cancer is one of the deadliest diseases, and current treatment regimens suffer from limited efficacy, nonspecific toxicity, and chemoresistance. With the advantages of good biocompatibility, large specific surface area, excellent cation exchange capacity, and easy availability, clay minerals have been receiving ever‐increasing interests in cancer treatment. They can act as carriers to reduce the toxic side effects of chemotherapeutic drugs, and some of their own properties can kill cancer cells, etc. Compared with other morphologies clays, layered clay minerals (LCM) have attracted more and more attention due to adjustable interlayer spacing, easier ion exchange, and stronger adsorption capacity. In this review, the structure, classification, physicochemical properties, and functionalization methods of LCM are summarized. The state‐of‐the‐art progress of LCM in antitumor therapy is systematically described, with emphasis on the application of montmorillonite, kaolinite, and vermiculite. Furthermore, the property–function relationships of LCM are comprehensively illustrated to reveal the design principles of clay‐based antitumor systems. Finally, foreseeable challenges and outlook in this field are discussed.

show abstract

“…More recently, organoclays with a magnetic response, that is, organoclays modified by the growth of magnetic Fe oxide particles, have also been employed for the removal of heavy metals, dyes, and arsenic [10][11][12]. The combination of magnetic nanoparticles with clays has been considered for enzymatic immobilization [13,14], the development of catalytic mate-rials [15,16], environmental remediation [17][18][19][20], and the design of biocompatible materials [21]. With regard to water treatment, these materials have the advantage of providing new sorption sites, but also allowing material recuperation through magnetic external fields.…”

Section: Introductionmentioning

confidence: 99%

“…[6]. The bentonite has an isoelectric point at pH 2.7, the external surface area (determined by N 2 adsorption) is 66.0 m 2 /g [19], and its cation exchange capacity (CEC) of 0.825 mmol/g [22].…”

Section: Introductionmentioning

confidence: 99%

Development of antibacterial magnetic clay-based nanocomposites for water treatment

Horue,

Barraqué,

Montes

et al. 2024

Comptes Rendus. Chimie

View full text Add to dashboard Cite

Organoclays were prepared using Argentinean montmorillonite (Mt), hexadecyltrimethylammonium, or benzalkonium chloride at different concentrations. Surfactant incorporation, a key factor in biocide capacity, was estimated using interlayer space and thermogravimetric analysis (TGA). Subsequently, Fe oxides were grown on the organoclays. Saturation magnetization indicated that all magnetic composites could respond to an external magnetic field. Inhibition experiments showed high antibacterial activity against Enterococcus faecium, Escherichia coli, and Salmonella typhimurium. The synthesized nanocomposites loaded with 150% CEC (cation exchange capacity) of hexadecyltrimethylammonium were the most effective. Those results were more precisely investigated using the viable plate count method. The magnetic materials had a similar antimicrobial effect to those without magnetic properties, indicating that Fe oxides can be nucleated to impart a magnetic response without affecting the biocide properties. The organoclays showed higher antibacterial activity against E. coli than against the other bacteria assayed. In addition, the agar disk-diffusion method

show abstract

Magnetic nanocomposite based on montmorillonite, Fe oxides, and hydrothermal carbon: Synthesis, characterization and pollutants adsorption tests

Cited by 10 publications

References 38 publications

Selective Adsorbent Design with Multifunctional Surfaces: Innovating Solutions for Heterogeneous Catalysis in Water

Selective Adsorbent Design with Multifunctional Surfaces: Innovating Solutions for Heterogeneous Catalysis in Water

Layered Clay Minerals in Cancer Therapy: Recent Progress and Prospects

Development of antibacterial magnetic clay-based nanocomposites for water treatment

Contact Info

Product

Resources

About