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Synthetic tuning of Co<sup>II</sup>-doped silica nanoarchitecture towards electrochemical sensing ability

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dc.contributor.author Bochkova O.
dc.contributor.author Khrizanforov M.
dc.contributor.author Gubaidullin A.
dc.contributor.author Gerasimova T.
dc.contributor.author Nizameev I.
dc.contributor.author Kholin K.
dc.contributor.author Laskin A.
dc.contributor.author Budnikova Y.
dc.contributor.author Sinyashin O.
dc.contributor.author Mustafina A.
dc.date.accessioned 2021-02-25T20:54:11Z
dc.date.available 2021-02-25T20:54:11Z
dc.date.issued 2020
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/162596
dc.description.abstract © 2020 by the authors. Licensee MDPI, Basel, Switzerland. The present work introduces both synthesis of silica nanoparticles doped with CoII ions by means of differently modified microemulsion water-in-oil (w/o) and Stöber techniques and characterization of the hybrid nanoparticles (CoII@SiO2) by TEM, DLS, XRD, ICP-EOS, SAXS, UV-Vis, and UV-Vis/DR spectroscopy and electrochemical methods. The results reveal the lack of nanocrystalline dopants inside the hybrid nanoparticles, as well as no ligands, when CoII ions are added to the synthetic mixtures as CoII (bpy)3 complexes, thus pointing to coordination of CoII ions with Si-O- groups as main driving force of the doping. The UV-Vis/DR spectra of CoII@SiO2 in the range of d-d transitions indicate that Stöber synthesis in greater extent than the w/o one stabilizes tetrahedral CoII ions versus the octahedral ions. Both cobalt content and homogeneity of the CoII distribution within CoII@SiO2 are greatly influenced by the synthetic technique. The electrochemical behavior of CoII@SiO2 is manifested by one oxidation and two reduction steps, which provide the basis for electrochemical response on glyphosate and HP(O)(OEt)2 with the LOD = 0.1 µM and the linearity within 0.1–80 µM. The Stöber CoII@SiO2 are able to discriminate glyphosate from HP(O)(OEt)2, while the w/o nanoparticles are more efficient but nonselective sensors on the toxicants.
dc.subject Cobalt (II) dopant
dc.subject Electrochemical sensing
dc.subject Nanoarchitecture
dc.subject Organophosphorous compounds
dc.subject Silica nanoparticles
dc.subject Spectral properties
dc.title Synthetic tuning of Co<sup>II</sup>-doped silica nanoarchitecture towards electrochemical sensing ability
dc.type Article
dc.relation.ispartofseries-issue 7
dc.relation.ispartofseries-volume 10
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 1
dc.source.id SCOPUS-2020-10-7-SID85090711529


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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