AA- and ABA-stacked carbon nitride (C3N4): novel photocatalytic water splitting solar-to-hydrogen energy conversion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43954207" target="_blank" >RIV/49777513:23640/18:43954207 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/18:00328972

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c8cp02898b" target="_blank" >http://dx.doi.org/10.1039/c8cp02898b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c8cp02898b" target="_blank" >10.1039/c8cp02898b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

AA- and ABA-stacked carbon nitride (C3N4): novel photocatalytic water splitting solar-to-hydrogen energy conversion

Popis výsledku v původním jazyce

We report the development of the C3N4 structure by integrating two different structures: (i) two identical layers as AAstacked C3N4 and (ii) intercalating one different layer between two identical layers as ABA stacked C3N4. This in turn endows C3N4 with significantly promoted charge migration, up-shifted conduction-band (CB) level, enhanced CB potential from -0.89 eV (AA-stacked C3N4) to -1.03 eV (ABA-stacked C3N4), broadened band gap as well as enhanced surface area, all of which favor the enhancement of the photocatalytic performance. The optical absorption level exhibited significant enhancement in the visible light region when shifting from AA-stacked C3N4 to ABA-stacked C3N4, where the absorption edge moves from = 508.1 = 454.1 nm. This corresponds to the direct optical band gap of 2.44 eV 2.73 eV, which is well matched with the solar spectrum and the sufficient negative CB potential for H+/H-2 reduction. Based on these results, we can conclude that AA-stacked and ABA-stacked C3N4 satisfies all the requirements to be efficient photocatalysts. This study will significantly improve the search efficiency and considerably aid the experimentalists in the exploration of novel photocatalysts.

Název v anglickém jazyce

AA- and ABA-stacked carbon nitride (C3N4): novel photocatalytic water splitting solar-to-hydrogen energy conversion

Popis výsledku anglicky

We report the development of the C3N4 structure by integrating two different structures: (i) two identical layers as AAstacked C3N4 and (ii) intercalating one different layer between two identical layers as ABA stacked C3N4. This in turn endows C3N4 with significantly promoted charge migration, up-shifted conduction-band (CB) level, enhanced CB potential from -0.89 eV (AA-stacked C3N4) to -1.03 eV (ABA-stacked C3N4), broadened band gap as well as enhanced surface area, all of which favor the enhancement of the photocatalytic performance. The optical absorption level exhibited significant enhancement in the visible light region when shifting from AA-stacked C3N4 to ABA-stacked C3N4, where the absorption edge moves from = 508.1 = 454.1 nm. This corresponds to the direct optical band gap of 2.44 eV 2.73 eV, which is well matched with the solar spectrum and the sufficient negative CB potential for H+/H-2 reduction. Based on these results, we can conclude that AA-stacked and ABA-stacked C3N4 satisfies all the requirements to be efficient photocatalysts. This study will significantly improve the search efficiency and considerably aid the experimentalists in the exploration of novel photocatalysts.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL CHEMISTRY CHEMICAL PHYSICS

ISSN

1463-9076

e-ISSN

—

Svazek periodika

20

Číslo periodika v rámci svazku

35

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

22972-22979

Kód UT WoS článku

000445220500057

EID výsledku v databázi Scopus

2-s2.0-85053462867