Exfoliated Nanosheets of Graphitic Carbon Nitride: Study of Optical and Photoectrochemical Properties

Kód výsledku v IS VaVaI

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Nalezeny alternativní kódy

RIV/61989100:27710/17:86100571

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Exfoliated Nanosheets of Graphitic Carbon Nitride: Study of Optical and Photoectrochemical Properties

Popis výsledku v původním jazyce

The graphitic carbon nitride (g-C3N4) samples were prepared by the three different methods: (i) heating of melamine at 600 ºC (bulk g-C3N4), (ii) exfoliation of bulk g-C3N4 by heating at 500 ºC (Ex500) and (iii) exfoliation of bulk g-C3N4 by ultrasonication in an aqueous dispersion (ExUltra). The exfoliation was performed to obtain g-C3N4 nanosheets or other nanostructures. The samples characterization was performed by UV-Vis diffuse reflectance (DRS UV-Vis), photoluminescence (PL) spectroscopy and photoelectrochemical (PEC) measurement. The smallest transition energies Et was evaluated for bulk g-C3N4 (Et = 2.84 eV). The exfoliation by heating and ultrasonication caused both increase of transition energies Et at 3.07 eV and blue-shift and intensity increase of PL emission bands. The exfoliation by heating at 500 ºC increased photocurrent in comparison with the bulk g-C3N4 and ultrasonicated samples. This indicates the beneficial effect of the exfoliation by heating for various photocatalytic applications due to the higher mobility and separation efficiency of photo-induced carriers.

Název v anglickém jazyce

Exfoliated Nanosheets of Graphitic Carbon Nitride: Study of Optical and Photoectrochemical Properties

Popis výsledku anglicky

The graphitic carbon nitride (g-C3N4) samples were prepared by the three different methods: (i) heating of melamine at 600 ºC (bulk g-C3N4), (ii) exfoliation of bulk g-C3N4 by heating at 500 ºC (Ex500) and (iii) exfoliation of bulk g-C3N4 by ultrasonication in an aqueous dispersion (ExUltra). The exfoliation was performed to obtain g-C3N4 nanosheets or other nanostructures. The samples characterization was performed by UV-Vis diffuse reflectance (DRS UV-Vis), photoluminescence (PL) spectroscopy and photoelectrochemical (PEC) measurement. The smallest transition energies Et was evaluated for bulk g-C3N4 (Et = 2.84 eV). The exfoliation by heating and ultrasonication caused both increase of transition energies Et at 3.07 eV and blue-shift and intensity increase of PL emission bands. The exfoliation by heating at 500 ºC increased photocurrent in comparison with the bulk g-C3N4 and ultrasonicated samples. This indicates the beneficial effect of the exfoliation by heating for various photocatalytic applications due to the higher mobility and separation efficiency of photo-induced carriers.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

NANOCON 2016: 8th International Conference on Nanomaterials - Research &amp; Application : list of abstracts : October 19th-21st 2016, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-68-0

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

98-103

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

19. 10. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000410656100016