U 76 Uritskaya, A. A. Kinetic relationships of the formation of antimony sulfide [Текст] / A. A. Uritskaya, T. P. Bol'shchikova, N. S. Kozhevnikova // Russian Journal of General Chemistry. - 2007. - Vol. 77, № 5. - С. 818-821. - Библиогр. : с. 820 (7 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КИНЕТИКА -- СУЛЬФИД СУРЬМЫ Аннотация: The kinetics of deposition of antimony sulfide from solutions of sodium thiosulfate was studied. The reaction orders with respect to the components and the activation energy of the process were determined Полный текст |
C 75 Considering the Polynuclear Complexesin the Ionic Equilibria of the Pb2+–H2O System / N. S. Kozhevnikova, S. I. Sadovnikov, A. A. Uritskaya, A. I. Gusev // Russian Journal of General Chemistry. - 2012. - Vol. 82, № 4. - P. 626-634 : il. - Bibliogr. : p. 634 (36 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ГИДРОКСИД СВИНЦА -- ИОННОЕ РАВНОВЕСИЕ Аннотация: Analysis of conditions of the lead hydroxide and sulfide formation in the Pb2+–H2O system was carried out with accounting for the formation of polynuclear hydroxo-complexes. This allows predicting a possibility of the lead hydroxide formation in the solution before the beginning of the synthesis of lead sulfide. The domains of the stable formation of Pb(OH)2 and PbS were calculated for the systems containing lead citrate complexes and hydroxo-complexes. The proposed calculation method can be used for the quantitative determination of the reaction mixture composition and development of the chemical deposition technology of lead chalcogenides in different morphological forms: nanocrystalline powders (hydrophobic sol), quantum dots, heterostructures of the core@shell type or films. The proposed calculation method is applicable to other chalcogenide systems containing metal ions forming mononuclear and polynuclear hydroxo-complexes \\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2012, V. 82, N 4, p. 626–634.pdf |
T 44 The Synthesis of Nucleus–Shell Cd(OH)2/CdS Structures by Chemical Precipitation from Aqueous Solutions / A. S. Vorokh, N. S. Kozhevnikova, A. A. Uritskaya, A. Magerl // Russian Journal of Physical Chemistry A. - 2008. - Vol. 82, № 7. - P. 1132-1137 : il. - Bibliogr. : p. 1137 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КАДМИЙ -- СУЛЬФИД КАДМИЯ -- РАСТВОРЫ ВОДНЫЕ -- ОСАЖДЕНИЕ Аннотация: The region of stable coexistence of Cd(OH)2 and CdS as a function of pH and the concentration of the complex-forming agent (ammonia) was determined by thermodynamic analysis with the purpose of the preparation of Cd(OH)2 cadmium hydroxide particles surrounded by cadmium sulfide CdS shells. In this region, powders were obtained by chemical precipitation during various precipitation times from aqueous solutions. X-ray diffraction was used to track the growth of the CdS nanophase of a disordered structure and hexagonal Cd(OH)2 phase consumption with time. It was found by complexonometry that part of cadmium formed insoluble structures as a result of the formation of continuous nanosized CdS shells on single crystalline Cd(OH)2 particles. A comparative analysis of the experimental data was used to determine the kinetics of formation of nucleus–shell Cd(OH)2/CdS particles in the system Полный текст |
I-76 Ionic Equilibria in Alkaline Aqueous Solutions of Metal Complex Salts / N. S. Kozhevnikova, A. A. Uritskaya, A. S. Vorokh, A. A. Rempel // Russian Journal of General Chemistry. - 2008. - Vol. 78, № 4. - P551-556 : il. - Bibliogr. : p. 556 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ИОННОЕ РАВНОВЕСИЕ -- ЩЕЛОЧНЫЕ ВОДНЫЕ РАСТВОРЫ -- СОЛИ МЕТАЛЛОВ Аннотация: A thermodynamic analysis of the formation conditions of metal hydroxides was performed. The areas of stable formation of metal hydroxide precipitates in the coordinates pH–metal concentration, including also solutions containing various kinds of complexing agents, were evaluated. With the precipitation of cadmium hydroxide as example, X-ray phase analysis confirmed the formation of metal hydroxide in the chemical composition areas where its formation is predicted by a thermodynamic analysis Полный текст |