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Information × Registration Number 0214U000120, 0110U004580 , R & D reports Title Hybrid organic-inorganic nanoadsorbents - improvement of the synthesis and development of their production technology popup.stage_title Head Zub Yuriy Leonidovych, Registration Date 16-01-2014 Organization Institute of Surface Chemistry of the National Academy of Sciences of Ukraine popup.description2 There were developed techniques and synthesized silica samples with thiourea groups: bridged polysilsesquioxane xerogels (specific surface area from 75 to 108 m2/g, thiourea groups content 1,0-1,8 mmol/g) mesoporous silica of SBA-15 type, and spherical particles to study them as sorbents of Hg2+ ions. The most attractive in terms of the kinetics of mass transfer processes are templated mesoporous silicas. It was determined that the greatest SAC values (~ 355-370 mg/g) were observed for samples with a functional monolayer on the surface (M:Lig = 1:1). Stober method was used to obtain spherical silica particles with different composition of the surface layer: monofunctional with fluorinated and amino groups and bifunctional with fluorinated/amino (ethylendiamino) groups, surface layer with aminopropyl functional groups and 1,2- bis(triethoxysilyl) ethane used as a structuring agent. The introduction of fluorinated groups significantly reduces the sorption of metal ions and protein as compared to particles with only amine groups. There were synthesized bridges polysilsesquioxane xerogels with ?Si(CH2)3NHP(O)(OC2H5)2 functional groups (0,9-1,4 mmol/g, non-porous) using the sol-gel method and sorption of lanthanides: neodymium(III) and dysprosium (III) was studied . It was investigated that mesoporous template silicas with phosphonic acid residues, are an effective sorbents for the removal from nitric solutions of uranyl ions (276-299 mg/g), thorium (IV) (60-66 mg/g) and micro quantities of 239Pu (IV) and practically does not absorb 241Am, so they can be used for efficient separation of Pu/Am with separation factor of at least 2х103. There was also studied the adsorption of nitrogen molecules, n- hexane and triethylamine by polysilsesquioxane sorbents functionalized with amino, mercapto and phosphonic groups. Product Description popup.authors Мельник І.В. Назарчук Г.І. Погорілий Р.П. Томіна В.В. popup.nrat_date 2020-04-02 Close