Halloysite tubular nanoclay was applied as a template for synthesis of ruthenium core–shell composite catalysts for the first time; 50 nm diameter ceramic tubular systems with metal seeded interiors were produced. The procedure for the metal deposition and prior halloysite modification had a significant influence on properties of the catalyst and, as a consequence, on its activity in hydrogenation of phenol. Cyclohexanol was the main reaction product, but its yield depended on the substrate conversion and nanoarchitectural composition of the catalysts used. The maximum catalytic activity (turnover frequency, TOF) achieved was 17 282 h–1 in terms of hydrogen uptake per surface Ru atoms. The substrate selectivity of halloysite-based catalysts was also demonstrated at the comparative hydrogenation of phenol and various cresols.

Halloysite

Cyclohexanol

Nanomaterial-based catalyst

10.1021/acs.iecr.7b03282

Cite

Citations (89)

Получение наночастиц металлов в обратно-мицеллярных системах

Башкирский химический журнал (2011)

Alex Savin А. Б. Берберов Е. В. Иванов П. А. Гущин В. А. Винокуров

The process of synthesis of nanomaterials in microemulsions inverse of the «water in oil» has been obtained. Samples of nanoparticles of different structure and composition were produced. The resulting nanomaterials were investigated by the method of transmission electron microscopy. Possibility of monitoring of the size and the form of the nanoparticles is developed. Received nanomaterials are investigated by means of a method of appearing through electronic microscopy.

Nanomaterials

Microemulsion

Source

Cite

Citations (0)

Association of Keplerate-Type Polyoxometalate {Mo72Fe30} with Tetracycline: Nature of Binding Sites and Antimicrobial Action

Inorganics (2022)

K. V. Grzhegorzhevskii М. О. Тонкушина П. А. Гущин I.D. Gagarin Alexander Ermoshin

The association process between the tetracycline (TC) antibiotic molecule and Keplerate-type nanocluster polyoxometalate (POM) {Mo72Fe30} was studied in aqueous solution. The novel supramolecular ensemble {Mo72Fe30}@TC12.5 was produced, its composition and structure were revealed by means of elemental analysis (C, N, H) and vibrational spectroscopy (IR and Raman). Based on the spectral data, the POM structure’s integrity was confirmed and binding sites of TC with the Keplerate {Mo72Fe30} surface were found. Due to thermogravimetric analysis (TG) and in-situ Raman spectroscopy during the process of {Mo72Fe30}@TC12.5 thermal destruction, we showed a significant change in the phase composition of POM’s destruction products after association with TC. The antibacterial activity of the obtained complex {Mo72Fe30}@TC12.5 was examined. The experimental results allowed us to note the partial inhibition of TC’s antibacterial activity owing to the coordination of TC to FeIII centers, in turn, which hinders the participation of TC in coordination via Mg2+ of ribosomal subunits 30S in bacteria.

Polyoxometalate

Thermogravimetric analysis

10.3390/inorganics11010009

Cite

Citations (3)

Получение нефтяных фракций из донных отложений озера Cамотлор

Башкирский химический журнал (2013)

Д. С. Афонин А Б Берберов Я. А. Чудаков Е. В. Иванов П. А. Гущин

The content of oil in the sediments of Lake Samotlor was measured. It was found that the sludge deposits were heavily polluted, and the oil concentration was about 40%. Via the distillation of crude oil there were produced gasoline, diesel fraction and black oil b.p. 350 оС. The maintenance of black oil makes 71 wt %. The maintenance of petrol and diesel fractions makes 5 and 21 wt % accordingly.

Fraction (chemistry)

Oil sludge

Source

Cite

Citations (0)

Kinetic Inhibition of Hydrate Formation by Polymeric Reagents: Effect of Pressure and Structure of Gas Hydrates

Chemistry and Technology of Fuels and Oils (2016)

Anton P. Semenov V. I. Medvedev П. А. Гущин В. А. Винокуров

Clathrate hydrate

Propane

Supercooling

10.1007/s10553-016-0658-5