title: Preparation of colloidal CdSe and CdS/CdSe nanoparticles from sodium selenosulfate in aqueous polymers solutions.
abstract: Cadmium selenide nanoparticles formation at the interaction between CdCl2 and Na2SeSO3 in aqueous solutions of sodium polyphosphate and gelatin has been studied. Structural and optical properties of CdSe nanoparticles have been characterized. It has been shown that the temperature and the ratio of reagents concentrations are the basic parameters, controlling the size of CdSe nanoparticles. Photocatalytic activity of CdS nanoparticles in Na2SeSO3 reduction has been found and investigated; structural and optical properties of binary CdS/CdSe nanoparticles have been characterized. This photoreaction, when carried out in the presence of CdCl2, results in the formation of composite CdS/CdSe nanoparticles. It has been shown that slow interaction of adsorbed selenosulfate with surface-trapped CdS conduction band electrons is the limiting stage of the photocatalytic reaction.
authors.affiliation: Pisarzhevski Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, 31, Nauki av., 03028, Kiev 028, Ukraine.
authors.forename: Alexandra E
authors.initials: AE
authors.lastname: Raevskaya
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Stroyuk
authors.forename: Stephan Ya
authors.initials: SY
authors.lastname: Kuchmiy
mesh_terms: D019187:Cadmium Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D003102:Colloids / Q000138:chemical synthesis* / Q000737:chemistry; D005780:Gelatin / Q000737:chemistry; D007700:Kinetics; D053758:Nanoparticles / Q000737:chemistry*; D010777:Photochemistry; D011122:Polyphosphates / Q000737:chemistry*; D018036:Selenium Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry*; D013440:Sulfides / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D011122:Polyphosphates; D018036:Selenium Compounds; D012996:Solutions; D013431:Sulfates; D013440:Sulfides; C034939:cadmium sulfide; D014867:Water; D005780:Gelatin; C058667:cadmium selenide; C519925:sodium selenosulfate