Synthesis, Structure, and Spectral Properties of ZnTe-Containing Nanocomposites Based on Arabinogalactan

Zvereva, Marina V.; Zhmurova, Anna V.

doi:10.1134/s1070363222100139

Cited by 4 publications

(6 citation statements)

References 22 publications

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“…Water-soluble aggregation-stable PVT–Te 0 NPs (1.4–4.3 wt% Te) were obtained by the oxidation of Te 2− anions to zero-valent tellurium (Te 0 ) in an aqueous PVT solution. The Te 2− anions were pre-generated by the reduction (activation) in commercial powdered tellurium with hydrazine hydrate in an alkaline medium ( Figure 3 ), according to the method previously proposed in [ 19 , 20 ].…”

Section: Resultsmentioning

confidence: 99%

“…The solution containing PVT was cooled to room temperature. The reaction mixture with tellurium anions (120–400 µL) that were pre-synthesized in accordance with the technique described in the articles [ 19 , 20 ] was added into a Te solution flask under constant stirring with a magnetic stirrer. The formation of the Te 0 nanoparticles was identified by a change in the color of the reaction mixture from colorless (native PVT solution) or red–purple (reaction mixture containing Te 2− anions) to gray.…”

Section: Methodsmentioning

confidence: 99%

“…The solution containing PVT was cooled to room temperature. The reaction mixture with tellurium anions (120-400 µL) that were presynthesized in accordance with the technique described in the articles [19,20] was added…”

Section: Synthesis Of Pvt-te 0 Npsmentioning

confidence: 99%

“…Under these conditions, we obtained Te 0 -containing PVT-based nanocomposites with yields of 58-71%, which are water soluble powders of grey color. tellurium with hydrazine hydrate in an alkaline medium (Figure 3), according to the method previously proposed in [19,20]. The process resulted in the powdered tellurium being completely dissolved to form highly reactive Te 2− anions in accordance with Equation (2):…”

Section: Synthesis Of Pvt-te 0 Npsmentioning

confidence: 99%

“…In this regard, the use of previously developed simple and environmentally friendly methods of producing chalcogen containing nanoparticles [ 19 , 20 ], particularly Te 0 ones from the commercially available bulk Te powder, as well as the application of the original polymer poly(1-vinyl-1,2,4-triazole) (PVT) in the form of a polymeric stabilizing matrix for the nanoparticle formation, seems highly promising for the synthesis of thermoelectric nanocomposites. The PVT exhibits a complex of practically important properties such as high hydrophilicity, solubility in polar organic solvents, ability for complexation and quaternization, chemical stability, biocompatibility, and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and DC Electrical Conductivity of Nanocomposites Based on Poly(1-vinyl-1,2,4-triazole) and Thermoelectric Tellurium Nanoparticles

et al. 2023

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In this work, the structural characteristics and DC electrical conductivity of firstly synthesized organic–inorganic nanocomposites of thermoelectric Te0 nanoparticles (1.4, 2.8, 4.3 wt%) and poly(1-vinyl-1,2,4-triazole) (PVT) were analyzed. The composites were characterized by high-resolution transmission electron microscopy, X-ray diffractometry, UV-Vis spectroscopy, and dynamic light scattering analysis. The study results showed that the nanocomposite nanoparticles distributed in the polymer matrix had a shape close to spherical and an average size of 4–18 nm. The average size of the nanoparticles was determined using the Brus model relation. The optical band gap applied in the model was determined on the basis of UV-Vis data by the Tauc method and the 10% absorption method. The values obtained varied between 2.9 and 5.1 nm. These values are in good agreement with the values of the nanoparticle size, which are typical for their fractions presented in the nanocomposite. The characteristic sizes of the nanoparticles in the fractions obtained from the Pesika size distribution data were 4.6, 4.9, and 5.0 nm for the nanocomposites with percentages of 1.4, 2.8, and 4.3%, respectively. The DC electrical conductivity of the nanocomposites was measured by a two-probe method in the temperature range of 25–80 °C. It was found that the formation of an inorganic nanophase in the PVT polymer as well as an increase in the average size of nanoparticles led to an increase in the DC conductivity over the entire temperature range. The results revealed that the DC electrical conductivity of nanocomposites with a Tellurium content of 2.8, 4.3 wt% at 80 °C becomes higher than the conventional boundary of 10−10 S/cm separating dielectrics and semiconductors.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Pvt-te 0 Npsmentioning

confidence: 99%

Section: Synthesis Of Pvt-te 0 Npsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and DC Electrical Conductivity of Nanocomposites Based on Poly(1-vinyl-1,2,4-triazole) and Thermoelectric Tellurium Nanoparticles

et al. 2023

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Biosafety Assessment of a Selenium-Containing Nanocomposite Based on a Polysaccharide Matrix of Starch

Zvereva

2023

Nanotechnol Russia

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The Use of Polysaccharide Matrices as a Basis for the Formation of Tellurium Nanoparticles with Different Morphologies

Zvereva

2024

Polymers

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The widening of possible areas of practical uses for zero-valent tellurium nanoparticles (Te0NPs) from biomedicine to optoelectronic and thermoelectric applications determines the actuality of the development of simple and affordable methods for their preparation. Among the existing variety of approaches to the synthesis of Te0NPs, special attention should be paid to chemical methods, and especially to “green” approaches, which are based on the use of precursors of tellurium in their powder bulk form and natural galactose-containing polysaccharides—arabinogalactan (Ar-Gal), galactomannan—(GM-dP) and κ-carrageenan (κ-CG) acting as ligands stabilizing the surface of the Te0NPs. The use of basic-reduction system “N2H4 H2O-NaOH” for preliminary activation of bulk-Te and Ar-Gal, GM-dP and κ-CG allowed us to obtain in aqueous medium a number of stable nanocomposites consisting of Te0NPs stabilized by the polysaccharides’ macromolecules. By varying the precursor ratio, different morphologies of nanoparticles were obtained, ranging from spheres at a polysaccharide/Te ratio of 100:1 to rice-like at a 10:1 ratio. The type (branched, combed, or linear sulfated) of polysaccharide and its molecular weight value determined the size of the nanoparticles. Thus, the galactose-containing polysaccharides that were selected for this study may be promising renewable materials for the production of water-soluble Te0NPs with different morphology on this basis.

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Synthesis, Structure, and Spectral Properties of ZnTe-Containing Nanocomposites Based on Arabinogalactan

Cited by 4 publications

References 22 publications

Synthesis and DC Electrical Conductivity of Nanocomposites Based on Poly(1-vinyl-1,2,4-triazole) and Thermoelectric Tellurium Nanoparticles

Synthesis and DC Electrical Conductivity of Nanocomposites Based on Poly(1-vinyl-1,2,4-triazole) and Thermoelectric Tellurium Nanoparticles

Biosafety Assessment of a Selenium-Containing Nanocomposite Based on a Polysaccharide Matrix of Starch

The Use of Polysaccharide Matrices as a Basis for the Formation of Tellurium Nanoparticles with Different Morphologies

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