Graphitic C3N4 and Ti3C2 nanocomposites for the enhanced photocatalytic degradation of organic compounds and the evolution of hydrogen under visible irradiation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F24%3A00580963" target="_blank" >RIV/67985858:_____/24:00580963 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/24:10253255 RIV/61989100:27640/24:10253255 RIV/61989100:27710/24:10253255 RIV/61989100:27730/24:10253255

Výsledek na webu

<a href="https://hdl.handle.net/11104/0349653" target="_blank" >https://hdl.handle.net/11104/0349653</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2023.115260" target="_blank" >10.1016/j.jphotochem.2023.115260</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Graphitic C3N4 and Ti3C2 nanocomposites for the enhanced photocatalytic degradation of organic compounds and the evolution of hydrogen under visible irradiation

Popis výsledku v původním jazyce

Graphitic carbon nitride (g-C3N4) and Ti3C2 nanocomposites were formed in aqueous dispersions under ultra-sound, by the calcination of the mixtures of solid dicyandiamide (DCDA) and Ti3C2, and of dissolved DCDA and Ti3C2 in an aqueous phase. A heterojunction between g-C3N4 and Ti3C2, based on mutual chemical bonds, was created in all the synthetized materials as observed by X-ray photoelectron spectroscopy and also indicated by the decrease of band bap energies from 2.71 eV to 2.59 eV. The transfer of photoexcited electrons from g-C3N4 to Ti3C2 was documented by photoluminescence spectroscopy.Molecular modelling confirmed an observation provided by scanning electron microscopy that Ti3C2 was not equally dispersed in g-C3N4 but formed separated agglomerates.It was calculated that the interactions of g-C3N4/g-C3N4 and Ti3C2/Ti3C2 layers were stronger than those of g-C3N4/Ti3C2, and the interactions of Ti3C2 functionalized with oxygen were stronger than those of Ti3C2 functionalized with fluorine. The g-C3N4/Ti3C2 nanocomposites were further tested for photocatalytic oxidation reactions, such as the degradation of phenol and ofloxacin, and for reduction reactions, such as the evolution of hydrogen. Ofloxacin was degraded more efficiently (max. 79.4 %) than phenol (max. 20.1 %) during 120 min.The highest hydrogen yield was 76.9 mu mol after 4 h of irradiation. All the photocatalytic experiments were performed under visible irradiation and confirmed the electron transfer from g-C3N4 to Ti3C2 enhancing the photocatalytic activity of g-C3N4.

Název v anglickém jazyce

Graphitic C3N4 and Ti3C2 nanocomposites for the enhanced photocatalytic degradation of organic compounds and the evolution of hydrogen under visible irradiation

Popis výsledku anglicky

Graphitic carbon nitride (g-C3N4) and Ti3C2 nanocomposites were formed in aqueous dispersions under ultra-sound, by the calcination of the mixtures of solid dicyandiamide (DCDA) and Ti3C2, and of dissolved DCDA and Ti3C2 in an aqueous phase. A heterojunction between g-C3N4 and Ti3C2, based on mutual chemical bonds, was created in all the synthetized materials as observed by X-ray photoelectron spectroscopy and also indicated by the decrease of band bap energies from 2.71 eV to 2.59 eV. The transfer of photoexcited electrons from g-C3N4 to Ti3C2 was documented by photoluminescence spectroscopy.Molecular modelling confirmed an observation provided by scanning electron microscopy that Ti3C2 was not equally dispersed in g-C3N4 but formed separated agglomerates.It was calculated that the interactions of g-C3N4/g-C3N4 and Ti3C2/Ti3C2 layers were stronger than those of g-C3N4/Ti3C2, and the interactions of Ti3C2 functionalized with oxygen were stronger than those of Ti3C2 functionalized with fluorine. The g-C3N4/Ti3C2 nanocomposites were further tested for photocatalytic oxidation reactions, such as the degradation of phenol and ofloxacin, and for reduction reactions, such as the evolution of hydrogen. Ofloxacin was degraded more efficiently (max. 79.4 %) than phenol (max. 20.1 %) during 120 min.The highest hydrogen yield was 76.9 mu mol after 4 h of irradiation. All the photocatalytic experiments were performed under visible irradiation and confirmed the electron transfer from g-C3N4 to Ti3C2 enhancing the photocatalytic activity of g-C3N4.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Photochemistry and Photobiology A-Chemistry

ISSN

1010-6030

e-ISSN

1873-2666

Svazek periodika

447

Číslo periodika v rámci svazku

JAN 15

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

115260

Kód UT WoS článku

001104004900001

EID výsledku v databázi Scopus

2-s2.0-85174184386