Exfoliation of layered mixed zirconium 4-sulfophenylphosphonate phenylphosphonates

Kopecká, Kateřina; Melánová, Klára; Beneš, Ludvı́k; Knotek, Petr; Mazur, Michal; Zima, Vı́tězslav

doi:10.1039/c9dt03883c

Cited by 6 publications

(7 citation statements)

References 21 publications

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“…[60] In the case of the exfoliation of zirconium organophosphonate, it has been reported that the use of shear forces enables to obtain particles with larger lateral dimensions than for the ones obtained by ultrasound treatment, even though both methods lead to a reduction of the lateral size compared to the ones observed in the bulk. [61] Such a lateral size reduction has also been observed in the case of "soft" exfoliation, by swelling in organic solvents; the key parameter to control the lateral fracturing being the exfoliation time. [35,65] In our case, the shear rate governs the exfoliation efficiency and fracturing.…”

Section: Preparation and Characterization Of Functionalized Oxide Nanosheet Dispersionsmentioning

confidence: 87%

“…Yet, despite its ability to exfoliate in a large scale and even more efficiently than sonication, [61] to our knowledge, this method has very rarely been used for the exfoliation of materials other than graphene and dichalcogenides, [18] and never for the exfoliation of 2D-oxides with perovskite structure.…”

Section: Preparation and Characterization Of Functionalized Oxide Nanosheet Dispersionsmentioning

confidence: 99%

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Fast and efficient shear-force assisted production of covalently functionalized oxide nanosheets

Payet

Bouillet

Leroux

et al. 2022

Journal of Colloid and Interface Science

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HypothesisWhile controlled and efficient exfoliation of layered oxides often remains a time consuming challenge, the surface modification of inorganic nanosheets is of outmost importance for future applications. The functionalization of the bulk material prior to exfoliation should allow the application of tools developped for Van der Waals materials to directly produce functionalized oxide nanosheets. ExperimentsThe Aurivillius phase Bi 2 SrTa 2 O 9 is functionalized by a linear aliphatic phosphonic acid via microwave-assisted reactions. The structure of the hybrid material and the coordination of the phosphonate group is scrutinized, notably by Pair Distribution Function. This functionalized layered oxide is then exfoliated in one hour in organic solvent, using high shear force dispersion.The obtained nanosheets are characterized in suspension and as deposits to check their chemical integrity. FindingsThe covalent functionalization decreases the electrostatic cohesion between the inorganic layers leading to an efficient exfoliation in short time under shearing. The functionalization of the bulk material is preserved on the nanosheets upon exfoliation and plays a major role to enable liquid-phase exfoliation and in the stability of the resulting suspensions. This strategy is very promising for the straighforward preparation of functionalized nanosheets, paving the way for versatile design of new (multi)functional hybrid nanosheets for various potential applications.

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Section: Preparation and Characterization Of Functionalized Oxide Nanosheet Dispersionsmentioning

confidence: 87%

Section: Preparation and Characterization Of Functionalized Oxide Nanosheet Dispersionsmentioning

confidence: 99%

Fast and efficient shear-force assisted production of covalently functionalized oxide nanosheets

Payet

Bouillet

Leroux

et al. 2022

Journal of Colloid and Interface Science

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Section: Methodsmentioning

confidence: 99%

“…43 The topology of TiO 2 P25 surface was monitored on an atomic force microscope Dimension Icon (Bruker, Germany) in PeakForce Quantitative Nanoscale Mechanical mode using ScanAsyst-Air tips (k = 0.4 N/m) according to the described procedure. 44 TiO 2 P25 Dispersion Techniques TiO 2 P25 stock solutions (10 mg.mL −1 ) were prepared in distilled water. Different techniques were used to disperse TiO 2 P25, ie (1) manual shaking by hand in a tube, (2) sonication using ultrasonic probe UP400S, 400 W, 24 kHz (Hielscher Ultrasonics GmbH, Germany), equipped with titanium sonotrode H14 (14 mm in diameter) with the application of half of the cycle and maximal power, (3) FisherBrand FB15053H ultrasonic bath, 560 W (Fisher Scientific, UK), and (4) Ultra-turrax® disperser T10 (IKA-Werke GmbH & Co. KG, Germany) equipped with a dispersion tool (S 10 D-7 G-KS-65) at 13,000 rpm.…”

Section: Characterization Of Tio 2 P25mentioning

confidence: 99%

Evaluating the Use of TiO2 Nanoparticles for Toxicity Testing in Pulmonary A549 Cells

Báčová¹,

Knotek²,

Kopecká³

et al. 2022

IJN

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Purpose Titanium dioxide nanoparticles, 25 nm in size of crystallites (TiO 2 P25), are among the most produced nanomaterials worldwide. The broad use of TiO 2 P25 in material science has implied a request to evaluate their biological effects, especially in the lungs. Hence, the pulmonary A549 cell line has been used to estimate the effects of TiO 2 P25. However, the reports have provided dissimilar results on caused toxicity. Surprisingly, the physicochemical factors influencing TiO 2 P25 action in biological models have not been evaluated in most reports. Thus, the objective of the present study is to characterize the preparation of TiO 2 P25 for biological testing in A549 cells and to evaluate their biological effects. Methods We determined the size and crystallinity of TiO 2 P25. We used four techniques for TiO 2 P25 dispersion. We estimated the colloid stability of TiO 2 P25 in distilled water, isotonic NaCl solution, and cell culture medium. We applied the optimal dispersion conditions for testing the biological effects of TiO 2 P25 (0–100 µg.mL −1 ) in A549 cells using biochemical assays (dehydrogenase activity, glutathione levels) and microscopy. Results We found that the use of fetal bovine serum in culture medium is essential to maintain sufficient colloid stability of dispersed TiO 2 P25. Under these conditions, TiO 2 P25 were unable to induce a significant impairment of A549 cells according to the results of biochemical and microscopy evaluations. When the defined parameters for the use of TiO 2 P25 in A549 cells were met, similar results on the biological effects of TiO 2 P25 were obtained in two independent cell laboratories. Conclusion We optimized the experimental conditions of TiO 2 P25 preparation for toxicity testing in A549 cells. The results presented here on TiO 2 P25-induced cellular effects are reproducible. Therefore, our results can be helpful for other researchers using TiO 2 P25 as a reference material.

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“…Exfoliation is an extreme case of intercalation in which the individual layers are separated sufficiently to disturb the layered structure. − This is commonly required when the layers need to be separated into individual sheets, or few-layer flakes. Among the layered materials, exfoliated ZrP lists at the top due to its applications such as drug delivery, catalysis, heavy metal removal, and composite formation.…”

Section: Intercalation Of Zirconium Phosphatementioning

confidence: 99%

Revisiting the Old and Golden Inorganic Material, Zirconium Phosphate: Synthesis, Intercalation, Surface Functionalization, and Metal Ion Uptake

Bashir

Ahad

Malik

et al. 2020

Ind. Eng. Chem. Res.

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As a fascinating two-dimensional (2D) layered inorganic ion exchange material, zirconium phosphate (hereafter ZrP) has drawn interdisciplinary attention as an ion exchange material and a competent host for surface functionalization and intercalation. This is due to its captivating properties such as simple synthesis procedure, excellent ion-exchange capacity, excellent chemical, thermal, and radiolytic stability, tunable interlayer gallery, and good biocompatibility. Among all the well-known phases of ZrP, we restrict our discussion only to the alpha (α-ZrP) and gamma (γ-ZrP) phases for their efficient ion exchange performance and more tunable interlayer spacing. This review summarizes a panorama of the recent research progress on the synthesis, intercalation, and surface functionalization of ZrP with organic molecules, metal complexes, and metal ions for the design and fabrication of self-assembled monolayers, layer-by-layer assemblies, and nanocomposites. Within the confined gallery microenvironment of ZrP, usual molecules behave unusually with dramatic enhancement in the photophysical properties. The intercalation of metal complexes and their fascinating electronic properties will also be comprehensively highlighted in this review. Furthermore, for the first time, a cutting-edge advancement (2010 onward) of the versatile adsorption performance of ZrP-based materials for the uptake of toxic metal ions which include nuclear waste-related metal ions, heavy metal ions, and rare earth ions will be presented in detail. Last but not least, the review will conclude with the summary and future directions, which will provide new research opportunities for the development of ZrP based sustainable heterofunctional material.

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Exfoliation of layered mixed zirconium 4-sulfophenylphosphonate phenylphosphonates

Abstract: Mixed zirconium 4-sulfophenylphosphonate phenylphosphonates intercalated with amino alcohols or triethylamine can be exfoliated using mechanical forces in liquid media.

Cited by 6 publications

References 21 publications

Fast and efficient shear-force assisted production of covalently functionalized oxide nanosheets

Fast and efficient shear-force assisted production of covalently functionalized oxide nanosheets

Evaluating the Use of TiO2 Nanoparticles for Toxicity Testing in Pulmonary A549 Cells

Revisiting the Old and Golden Inorganic Material, Zirconium Phosphate: Synthesis, Intercalation, Surface Functionalization, and Metal Ion Uptake

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