Synthesis, characterization, and electrophoretic concentration of titanium dioxide nanoparticles in AOT microemulsions

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Synthesis, characterization, and electrophoretic concentration of titanium dioxide nanoparticles in AOT microemulsions. / Bulavchenko, Alexander I.; Shaparenko, Nikita O.; Demidova, Marina G.

In: Electrophoresis, Vol. 38, No. 13-14, 01.07.2017, p. 1678-1684.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{0c273bd80be843eebb2ea465be8b6308,

title = "Synthesis, characterization, and electrophoretic concentration of titanium dioxide nanoparticles in AOT microemulsions",

abstract = "Stable organosols of TiO2 nanoparticles were prepared by hydrolysis of titanium tetraisopropoxide (TTIP) in microemulsions of sodium bis(2-ethylhexyl)sulfoxynate (АОТ) in n-decane with increasing the content of aqueous pseudophase from 0.15 to 0.85 vol.%. As the water content increased, the hydrodynamic diameter of nanoparticles grew from 10 to 225 nm, and the ζ-potential, from -6 to 18 mV (the surface of TiO2 nanoparticles was recharged when the water content was 0.45 vol.%). Nonaqueous electrophoresis in a capacitor-type cell made it possible to concentrate nanoparticles with a diameter of 60 to 225 nm (concentration factor was 10), separate 20 nm and 225 nm particles, and decrease the content of АОТ in organosol by an order of magnitude. Preparation of a concentrate of nanoparticles with a low content (0.015 M) of AOT included the following stages: (i) electrophoresis after synthesis; (ii) sampling of the concentrate and its twenty-fold dilution with pure n-decane; and (iii) repeated electrophoresis. In situ laser and spectrophotometric scanning of the interelectrode space showed the formation of a sharp boundary between the raffinate and the layer of moving nanoparticles during electrophoresis.",

keywords = "Concentration, Microemulsions of TiO nanoparticles, Nonaqueous electrophoresis, Separation, Metal Nanoparticles/analysis, Emulsions, Succinates/chemistry, Titanium/analysis, Electrophoresis/methods, GOLD, EVAPORATION, REVERSE MICELLES, SILICA NANOPARTICLES, Microemulsions of TiO2 nanoparticles, SEPARATION, TIO2",

author = "Bulavchenko, {Alexander I.} and Shaparenko, {Nikita O.} and Demidova, {Marina G.}",

note = "{\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

year = "2017",

month = jul,

day = "1",

doi = "10.1002/elps.201600542",

language = "English",

volume = "38",

pages = "1678--1684",

journal = "Electrophoresis",

issn = "0173-0835",

publisher = "Wiley-VCH Verlag",

number = "13-14",

}

RIS

TY - JOUR

T1 - Synthesis, characterization, and electrophoretic concentration of titanium dioxide nanoparticles in AOT microemulsions

AU - Bulavchenko, Alexander I.

AU - Shaparenko, Nikita O.

AU - Demidova, Marina G.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - Stable organosols of TiO2 nanoparticles were prepared by hydrolysis of titanium tetraisopropoxide (TTIP) in microemulsions of sodium bis(2-ethylhexyl)sulfoxynate (АОТ) in n-decane with increasing the content of aqueous pseudophase from 0.15 to 0.85 vol.%. As the water content increased, the hydrodynamic diameter of nanoparticles grew from 10 to 225 nm, and the ζ-potential, from -6 to 18 mV (the surface of TiO2 nanoparticles was recharged when the water content was 0.45 vol.%). Nonaqueous electrophoresis in a capacitor-type cell made it possible to concentrate nanoparticles with a diameter of 60 to 225 nm (concentration factor was 10), separate 20 nm and 225 nm particles, and decrease the content of АОТ in organosol by an order of magnitude. Preparation of a concentrate of nanoparticles with a low content (0.015 M) of AOT included the following stages: (i) electrophoresis after synthesis; (ii) sampling of the concentrate and its twenty-fold dilution with pure n-decane; and (iii) repeated electrophoresis. In situ laser and spectrophotometric scanning of the interelectrode space showed the formation of a sharp boundary between the raffinate and the layer of moving nanoparticles during electrophoresis.

AB - Stable organosols of TiO2 nanoparticles were prepared by hydrolysis of titanium tetraisopropoxide (TTIP) in microemulsions of sodium bis(2-ethylhexyl)sulfoxynate (АОТ) in n-decane with increasing the content of aqueous pseudophase from 0.15 to 0.85 vol.%. As the water content increased, the hydrodynamic diameter of nanoparticles grew from 10 to 225 nm, and the ζ-potential, from -6 to 18 mV (the surface of TiO2 nanoparticles was recharged when the water content was 0.45 vol.%). Nonaqueous electrophoresis in a capacitor-type cell made it possible to concentrate nanoparticles with a diameter of 60 to 225 nm (concentration factor was 10), separate 20 nm and 225 nm particles, and decrease the content of АОТ in organosol by an order of magnitude. Preparation of a concentrate of nanoparticles with a low content (0.015 M) of AOT included the following stages: (i) electrophoresis after synthesis; (ii) sampling of the concentrate and its twenty-fold dilution with pure n-decane; and (iii) repeated electrophoresis. In situ laser and spectrophotometric scanning of the interelectrode space showed the formation of a sharp boundary between the raffinate and the layer of moving nanoparticles during electrophoresis.

KW - Concentration

KW - Microemulsions of TiO nanoparticles

KW - Nonaqueous electrophoresis

KW - Separation

KW - Metal Nanoparticles/analysis

KW - Emulsions

KW - Succinates/chemistry

KW - Titanium/analysis

KW - Electrophoresis/methods

KW - GOLD

KW - EVAPORATION

KW - REVERSE MICELLES

KW - SILICA NANOPARTICLES

KW - Microemulsions of TiO2 nanoparticles

KW - SEPARATION

KW - TIO2

UR - http://www.scopus.com/inward/record.url?scp=85019250434&partnerID=8YFLogxK

U2 - 10.1002/elps.201600542

DO - 10.1002/elps.201600542

M3 - Article

C2 - 28398647

AN - SCOPUS:85019250434

VL - 38

SP - 1678

EP - 1684

JO - Electrophoresis

JF - Electrophoresis

SN - 0173-0835

IS - 13-14

ER -

ID: 10191671