Synthesis of Core-Shell Nanoparticles Si-ZnS by Reactive Deposition of Photocatalytic ZnS Layer on the Surface of Carrier Si Nanoparticles in Aerosol Microdrops

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F15%3A10235817" target="_blank" >RIV/61989100:27640/15:10235817 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.sbspro.2015.06.254" target="_blank" >http://dx.doi.org/10.1016/j.sbspro.2015.06.254</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.sbspro.2015.06.254" target="_blank" >10.1016/j.sbspro.2015.06.254</a>

Result language

angličtina

Original language name

Synthesis of Core-Shell Nanoparticles Si-ZnS by Reactive Deposition of Photocatalytic ZnS Layer on the Surface of Carrier Si Nanoparticles in Aerosol Microdrops

Original language description

In this work we report on the aerosol synthesis of photocatalytic powder nanostructures of core-shell Si-ZnS particles. Submicron Si particles were prepared in the form of an aqueous dispersion by disintegration of the semiconductor-grade silicon powder in the cavitation Water Jet Mill disintegrator. Adding zinc acetate converted aqueous dispersion medium into a solution of Zn(Ac)(2) in various concentrations. The thus prepared liquid dispersion was then transformed into aerosol microdroplets with an average size of 3.5 microns in the Omron NE-U17 nebulizer. These were subsequently transported by flowing gas into the vigorously stirred aqueous solution of sodium sulfide. At impact of these aerosol microreactors the two liquid reactants produce zinc sulphide. Due to heterogeneous nucleation the insoluble phase of ZnS is precipitated on the phase surface of the silicon carrier particles contained in the microdroplets. As the amount of Zn(Ac)(2) in a microdroplet is limited, so is the extent of the precipitation reaction and the thickness of the container can be regulated by Zn(Ac)(2) concentration in the liquid dispersion. The obtained liquid dispersion of core-shell particles of Si-ZnS was dryed by controlled vacuum sublimation and stabilized in the form of lamellar nanoaggregates with a relatively high surface area. The final material enables easy handling and shows significantly higher photocatalytic activity than TiO2 Evonik P25 standard.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

21001 - Nano-materials (production and properties)

Project

<a href="/en/project/LO1203" target="_blank" >LO1203: Regional Materials Science and Technology Centre - Feasibility Program</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Technology, Innovation and Entrepreneurship : proceedings of the world conference : May 28-30, 2015, Istanbul, Turkey

ISBN

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ISSN

1877-0428

e-ISSN

neuvedeno

Number of pages

8

Pages from-to

2122-2129

Publisher name

Elsevier

Place of publication

Amsterdam

Event location

Istanbul

Event date

May 28, 2015

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000380509900257