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Colloidal and Immobilized Nanoparticles of Lead Xanthates.
Vorobyev, Sergey A; Saikova, Svetlana V; Novikova, Svetlana A; Fetisova, Olga Yu; Zharkov, Sergey M; Krylov, Alexander S; Likhatski, Maxim N; Mikhlin, Yuri L.
Afiliación
  • Vorobyev SA; Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk 660036, Russia.
  • Saikova SV; Siberian Federal University, Svobodny pr. 79, Krasnoyarsk 660041, Russia.
  • Novikova SA; Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk 660036, Russia.
  • Fetisova OY; Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk 660036, Russia.
  • Zharkov SM; Siberian Federal University, Svobodny pr. 79, Krasnoyarsk 660041, Russia.
  • Krylov AS; Kirensky Institute of Physics, Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk 660036, Russia.
  • Likhatski MN; Kirensky Institute of Physics, Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk 660036, Russia.
  • Mikhlin YL; Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Scientific Center" of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk 660036, Russia.
ACS Omega ; 4(7): 11472-11480, 2019 Jul 31.
Article en En | MEDLINE | ID: mdl-31460252
Although nanoparticles of heavy metal xanthates and their hydrosols can play important roles in froth flotation, environmental issues, analytics, and manufacturing of metal sulfide nanocomposites, they have received little attention. We studied colloidal solutions and immobilized particles prepared via interaction of aqueous lead nitrate with alkyl xanthates applying UV-vis absorption spectroscopy, dynamic light scattering, zeta potential measurement, thermogravimetry analysis, Fourier transform infrared spectroscopy, Raman scattering, X-ray photoelectron spectroscopy, atomic force microscopy, and transmission electron microscopy. The hydrodynamic diameter of colloidal particles of Pb(SSCOR)2 decreased from 500 to 50 nm with an increase in the alkyl radical length and the initial xanthate to lead ratio (X/Pb); the zeta potential magnitude varied similarly, although it remained negative. The effect of pH in the range of 4.5-11 was minor, but the colloids produced using excess of Pb2+ in alkaline media were close to PbX and decomposed much easier than PbX2. The uptake of lead xanthates on supports was generally low because of negative charges of the colloids; however, 50-100 nm thick PbX2 films were deposited on PbS and SiO2 from the media of X/Pb < 2 and pH < 9 because of preadsorption of Pb2+, while nanorods formed on highly oriented pyrolytic graphite.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2019 Tipo del documento: Article País de afiliación: Rusia Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2019 Tipo del documento: Article País de afiliación: Rusia Pais de publicación: Estados Unidos