Show simple item record

Microporous composite SiO2-TiO2 spheres prepared via the peroxo route: Lead(II) removal in aqueous media

dc.contributor.authorMorozov, Roman
dc.contributor.authorKrivtsov, Igor 
dc.contributor.authorAvdin, Viacheslav
dc.contributor.authorAmghouz, Zakariae 
dc.contributor.authorGorshkov, Alexander
dc.contributor.authorPushkova, Ekaterina
dc.contributor.authorBol'shakov, Oleg
dc.contributor.authorBulanova, Aleksandra
dc.contributor.authorIlkaeva, Marina
dc.identifier.citationJournal of Non-Crystalline Solids, 497, p. 71-81 (2018); doi:10.1016/j.jnoncrysol.2017.11.031
dc.description.abstractComposite microporous SiO2-TiO2 spheres and micro/mesoporous TiO2 spheres were prepared via the template-free two-step synthetic route using aqueous peroxotitanate solution and tetraethyl orthosilicate (TEOS) as precursors. Both the composite SiO2-TiO2 and pure TiO2 spheres prepared by the solvent-exchange method were initially non-porous, but the applied reflux treatment in water-ethanol suspension successfully transformed them into microporous materials with high apparent surface areas approaching 500 m2·g− 1 and the micropore volume of 0.17 cm3·g− 1, while maintaining the same morphology. The prepared composites retained high values of pore volume and specific surface area up to 400 °C of thermal treatment temperature. The crystallization of TiO2 into the anatase phase in the mixed oxide occurred only at 700 °C, that process was also accompanied by the significant reduction of pore volume, as well as apparent surface area values. The prepared materials were tested as adsorbents for the lead(II) removal; they demonstrated high adsorption capacities, reaching 340 mg(Pb2 +)·g− 1. Moreover, the mixed silica-titania oxide was found to be more efficient adsorbent at low pH
dc.description.sponsorshipSouth Ural State University is grateful forfinancial support of theMinistry of Education and Science of the Russian Federation (grant No16.2674.2014/K). University of Oviedo gratefully acknowledgesfi-nancial support from the Spanish MINECO (MAT2013-40950-R andMAT2016-78155-C2-1-R). Igor Krivtsov thanks for the support theRussian Foundation for Basic Research 16-29-10757-ofi.
dc.relation.ispartofJournal of Non-Crystalline Solidsspa
dc.rightsCC Reconocimiento- No comercial - Sin obras derivadas 4.0 Internacional
dc.subjectSpherical particlesspa
dc.subjectLead adsorptionspa
dc.subjectPeroxo methodspa
dc.titleMicroporous composite SiO2-TiO2 spheres prepared via the peroxo route: Lead(II) removal in aqueous mediaspa

Files in this item


This item appears in the following Collection(s)

Show simple item record

CC Reconocimiento- No comercial - Sin obras derivadas 4.0 Internacional
This item is protected with a Creative Commons License