Modifying the catalytic and adsorption properties of metals and oxides

Yagodovskii, V. D.

doi:10.1134/s0036024415110230

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…Notably, in the process of gold [ 41 ] and platinum [ 42 ] hydrosols synthesis, shift of optical spectra bands’ maximum, sensitive to surface conditions, was observed. Increasing the electron density on the surface of metal particles increases their catalytic activity [ 43 , 44 ]. Accordingly, the electronic charging and discharging of nanoparticles affects the efficiency of various catalytic reactions involving metals in the nanoscale state [ 45 , 46 ].…”

Section: Resultsmentioning

confidence: 99%

Evolution of Electronic State and Properties of Silver Nanoparticles during Their Formation in Aqueous Solution

Ershov

Tarasova

Ершов

2021

IJMS

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The electron density of a nanoparticle is a very important characteristic of the properties of a material. This paper describes the formation of silver nanoparticles (NPs) and the variation in the electronic state of an NP’s surface upon the reduction in Ag+ ions with oxalate ions, induced by UV irradiation. The calculations were based on optical spectrophotometry data. The NPs were characterized using Transmission electron microscopy and Dynamic light scattering. As ~10 nm nanoparticles are formed, the localized surface plasmon resonance (LSPR) band increases in intensity, decreases in width, and shifts to the UV region from 402 to 383 nm. The interband transitions (IBT) band (≤250 nm) increases in intensity, with the band shape and position remaining unchanged. The change in the shape and position of the LSPR band of silver nanoparticles in the course of their formation is attributable to an increasing concentration of free electrons in the particles as a result of a reduction in Ag+ ions on the surface and electron injection by radicals. The ζ-potential of colloids increases with an increase in electron density in silver nuclei. A quantitative relationship between this shift and electron density on the surface was derived on the basis of the Mie–Drude theory. The observed blue shift (19 nm) corresponds to an approximately 10% increase in the concentration of electrons in silver nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Evolution of Electronic State and Properties of Silver Nanoparticles during Their Formation in Aqueous Solution

Ershov

Tarasova

Ершов

2021

IJMS

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“…According to the IUPAC classification, the form of the hysteresis loop of the isotherms of obtained adsorbents corresponds to microporous adsorbents (pore size < 2 nm). [19][20][21] Table 3 shows characteristics of the porous structure of the obtained carbon:…”

Section: Formation Of Porous Structure Of Coal and Its Characteristicsmentioning

confidence: 99%

Study of impregnated cellulose thermal treatment process and properties of obtained active carbon

et al. 2019

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Single-stage process of obtaining active carbon by thermal processing of plant raw materials (mixture of different types of wood sawdust), impregnated with the mixture of phosphoric acid, urea and nitric acid salts has been developed. Active influence of impregnates on the process of carbonization and formation of carbon residue has been formed. It is established that carbon residue obtained in the interval of heating 20 • C-(500 • C-700 • C), possesses high sorption activity to the vapors of organic compounds and has ion-exchange capacity. It has been showed that the value of carton residue depending on the impregnate used in the wood increases compared to the yield of non-treated initial raw materials by 3.1 times at 600 • C and by 4.2 times at 700 • C.

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Influence of Ionizing Radiation on the Properties of a Nanodispersed PdO/CeO2 Catalyst in the Reaction of Low-Temperature Carbon Monoxide Oxidation

et al. 2018

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Modifying the catalytic and adsorption properties of metals and oxides

Cited by 4 publications

References 20 publications

Evolution of Electronic State and Properties of Silver Nanoparticles during Their Formation in Aqueous Solution

Evolution of Electronic State and Properties of Silver Nanoparticles during Their Formation in Aqueous Solution

Study of impregnated cellulose thermal treatment process and properties of obtained active carbon

Influence of Ionizing Radiation on the Properties of a Nanodispersed PdO/CeO2 Catalyst in the Reaction of Low-Temperature Carbon Monoxide Oxidation

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