A method was proposed for producing ZnS semiconductor nanoparticles: “quantum dots” in an ionic liquid medium, N-decylpyridinium tetrafluoroborate. The average nanoparticle sizes were determined by UV spectroscopy, dynamic light scattering, and probe microscopy. It is shown that a high threshold concentration of nanoparticles is reached in the ionic liquid medium, an increase in the concentration of precursors in the reaction mixture leads to an increase in the average size of nanoparticles. Ultrasonic treatment helps to reduce the polydispersity of sols and results in the formation of stable sols with a higher concentration of nanoparticles.

New ionic liquids, tetrachloroferrates(III) of quaternary ammonium salts [(CH 3 ) 2 NR 1 R 2 ]FeCl 4 [R 1 = CH 3 ; C 4 H 9 ; (CH 2 ) 3 CN. R 2 = C 10 H 21 ; C 16 H 33 ; CH 2 CH 2 OH; CH 2 C 6 H 5 ], were synthesized and their thermal stability was investigated in air in the range 25–600°С. The mechanism of thermal decomposition of the investigated ionic liquids is suggested in agreement with Hofmann’s rule as β-E2-elimination.

The hydrogenation of carbon dioxide has been examined in relation to the activity of catalysts containing 1–10 wt.% nickel, particularly as affected by the method of making the catalyst. Studies have been done on how alkali additives affect the activity of a nickel-aluminum catalyst. Measurements have been done on thiophen poisoning in the hydrogenation of CO2 on nickel catalysts.

The activity of nickel-containing catalysts with 1-10 wt % nickel in carbon(IV) oxide hydrogenation was studied. Properties of nickel-containing catalysts on different supports-sibunite and gamma-Al2O3-were compared. The effect of alkaline additive on the activity of a nickel-alumina catalyst was studied.