Hierarchical heterostructure built on the basis of SiO2 dielectric matrix and supramolecular complex β-cyclodextrin-ferrocene: Fabrication, physical properties and applications

Maksymych, Vitalii; Klapchuk, Myroslava; Borysiuk, Anatoliy; Kulyk, Yu. О.; Stadnyk, V. Yo.; Bordun, Ihor; Kohut, Z. O.; Ivashchyshyn, Fedir

doi:10.1016/j.materresbull.2023.112220

Cited by 2 publications

(2 citation statements)

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“…In general, the behavior of the Z (ω) for the MSM-41<SFA> encapsulate indicates significant changes in the concentration of the impurity states near the Fermi level by the guest component. In this case, shallow trap centers are also formed, which capture and hold the carriers for a time that is proportional to the period of the sinusoidal measurement signal, thus leading to oscillations of the Z (ω) [24].…”

Section: Resultsmentioning

confidence: 99%

“…The encapsulation of the SFA in the pores of the MSM-41 matrix was carried out by the method of a thermovacuum impregnation of the powdered material of the matrix with the obtained SFA solution. We have effectively used this technique for the formation of encapsulates in previous studies [24]. The thermovacuum impregnation process consisted of the following stages: (1) the powder MSM-41 was heated to a temperature of 140 • C (413 K) and kept under reduced pressure for 2 h, in order to completely degas the pores; and (2) the next step, while maintaining the reduced pressure, was lowering the temperature to 45-55 • C (318-328 K) and introducing the SFA solution into the volume where the powder was located.…”

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confidence: 99%

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The Accumulation of Electrical Energy Due to the Quantum-Dimensional Effects and Quantum Amplification of Sensor Sensitivity in a Nanoporous SiO2 Matrix Filled with Synthetic Fulvic Acid

Maksymych

Całus

Seredyuk

et al. 2023

Sensors

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A heterostructured nanocomposite MCM-41<SFA> was formed using the encapsulation method, where a silicon dioxide matrix—MCM-41 was the host matrix and synthetic fulvic acid was the organic guest. Using the method of nitrogen sorption/desorption, a high degree of monoporosity in the studied matrix was established, with a maximum for the distribution of its pores with radii of 1.42 nm. According to the results of an X-ray structural analysis, both the matrix and the encapsulate were characterized by an amorphous structure, and the absence of a manifestation of the guest component could be caused by its nanodispersity. The electrical, conductive, and polarization properties of the encapsulate were studied with impedance spectroscopy. The nature of the changes in the frequency behavior of the impedance, dielectric permittivity, and tangent of the dielectric loss angle under normal conditions, in a constant magnetic field, and under illumination, was established. The obtained results indicated the manifestation of photo- and magneto-resistive and capacitive effects. In the studied encapsulate, the combination of a high value of ε and a value of the tgδ of less than 1 in the low-frequency range was achieved, which is a prerequisite for the realization of a quantum electric energy storage device. A confirmation of the possibility of accumulating an electric charge was obtained by measuring the I-V characteristic, which took on a hysteresis behavior.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

The Accumulation of Electrical Energy Due to the Quantum-Dimensional Effects and Quantum Amplification of Sensor Sensitivity in a Nanoporous SiO2 Matrix Filled with Synthetic Fulvic Acid

Maksymych

Całus

Seredyuk

et al. 2023

Sensors

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The INVESTIGATION OF THE POROUS STRUCTURE OF CARBON SORBENTS BASED ON Β-Cyclodextrin FOR USE IN ENVIRONMENTAL PROTECTION TECHNOLOGIES

Bordun¹,

Malovanyy²,

Szymczykiewicz³

2023

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In this paper, the porous structure of three types of β-cyclodextrin (β-CD) carbons was synthesized and investigated. The first carbon was obtained from pure β-CD, the second carbon was synthesized from β-CD using the KOH activator, and the third carbon was synthesized from pure β-CD with additional ultrasonic treatment in the non-cavitation mode at the last stage. It was found that the carbon from pure β-CD has a micromesoporous structure with a small specific surface area (~35 m2/g). Activation with KOH causes a significant increase in the specific surface area (~654 m2/g) due to an increase in the content of micropores with an average size of 1,25 nm. The ultrasonic treatment causes mechanical grinding and oxidation of the carbon surface. It has been shown that such treatment increases the mesopore content and significantly changes the mesopore size distribution. It has been established that the oxidation of the β-CD carbon surface after ultrasonic treatment causes an increase in its hydrophilicity of up to 83,1%. The increase in hydrophilicity will allow more efficient use of synthesized carbon and composites based on it in solving the problems of environmental safety in water environments.

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Hierarchical heterostructure built on the basis of SiO2 dielectric matrix and supramolecular complex β-cyclodextrin-ferrocene: Fabrication, physical properties and applications

Cited by 2 publications

References 31 publications

The Accumulation of Electrical Energy Due to the Quantum-Dimensional Effects and Quantum Amplification of Sensor Sensitivity in a Nanoporous SiO2 Matrix Filled with Synthetic Fulvic Acid

The Accumulation of Electrical Energy Due to the Quantum-Dimensional Effects and Quantum Amplification of Sensor Sensitivity in a Nanoporous SiO2 Matrix Filled with Synthetic Fulvic Acid

The INVESTIGATION OF THE POROUS STRUCTURE OF CARBON SORBENTS BASED ON Β-Cyclodextrin FOR USE IN ENVIRONMENTAL PROTECTION TECHNOLOGIES

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