PHOTOCATALYTIC REACTIVATION OF g-C3N4 BASED NANOSORBENT

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F18%3A10239946" target="_blank" >RIV/61989100:27350/18:10239946 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/18:10239946 RIV/61989100:27640/18:10239946 RIV/61989100:27710/18:10239946 RIV/61989100:27740/18:10239946

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

PHOTOCATALYTIC REACTIVATION OF g-C3N4 BASED NANOSORBENT

Popis výsledku v původním jazyce

In this work, we present new preparation method, photocatalytic activity and photocatalytic reactivation of photoactive layered graphitic carbon nitride (g-C3N4), which was incorporated into silica structure containing zinc-silicate nanoparticles (ZnO-m.SiO2). Prepared material exhibits more than ten times larger specific surface area than pure bulk g-C3N4. Material was prepared by sonication of intensively stirred aqueous solution of zinc acetate and g-C3N4 while sodium water glass was slowly added by drops into the mixture. Sodium water glass reacted with zinc acetate, which was in excess, and composite ZnO-m.SiO2 nanoparticles has precipitated on g-C3N4 nanosheets. Prepared nanodispersion was turned into powder material by vacuum freeze drying technique. This technique preserves most of particles specific surface area by conserving chaotic arrangement of given particles in water solution. Prepared powder was further calcinated at 500 oC for one hour. Photocatalytic reactivation was tested on TiO2 and ZnO-m.SiO2/g-C3N4 nanocomposite. Material was stirred in the dark with aqueous solution of methylene blue for one hour to reach an adsorption-desorption equilibrium. Material with adsorbed dye on its surface was than separated and collected from solution by centrifugation, transferred into pure demineralised water and adsorbed dye was than decomposed under LED light irradiation within half an hour. Dispersion was centrifugated again to separate by-products, dried by vacuum freeze drying and subjected to sorption process again. Although kinetic characteristics for both materials were different, sorption properties of both materials did not change after reactivation.

Název v anglickém jazyce

PHOTOCATALYTIC REACTIVATION OF g-C3N4 BASED NANOSORBENT

Popis výsledku anglicky

In this work, we present new preparation method, photocatalytic activity and photocatalytic reactivation of photoactive layered graphitic carbon nitride (g-C3N4), which was incorporated into silica structure containing zinc-silicate nanoparticles (ZnO-m.SiO2). Prepared material exhibits more than ten times larger specific surface area than pure bulk g-C3N4. Material was prepared by sonication of intensively stirred aqueous solution of zinc acetate and g-C3N4 while sodium water glass was slowly added by drops into the mixture. Sodium water glass reacted with zinc acetate, which was in excess, and composite ZnO-m.SiO2 nanoparticles has precipitated on g-C3N4 nanosheets. Prepared nanodispersion was turned into powder material by vacuum freeze drying technique. This technique preserves most of particles specific surface area by conserving chaotic arrangement of given particles in water solution. Prepared powder was further calcinated at 500 oC for one hour. Photocatalytic reactivation was tested on TiO2 and ZnO-m.SiO2/g-C3N4 nanocomposite. Material was stirred in the dark with aqueous solution of methylene blue for one hour to reach an adsorption-desorption equilibrium. Material with adsorbed dye on its surface was than separated and collected from solution by centrifugation, transferred into pure demineralised water and adsorbed dye was than decomposed under LED light irradiation within half an hour. Dispersion was centrifugated again to separate by-products, dried by vacuum freeze drying and subjected to sorption process again. Although kinetic characteristics for both materials were different, sorption properties of both materials did not change after reactivation.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

NANOCON 2017 : conference proceedings : October 18-20, 2017, Brno, Czech Republic

ISBN

978-80-87294-78-9

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

289-294

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

18. 10. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000452823300048