Title :

Reductive Modification of Carbon Nitride Structure by Metals-The Influence on Structure and Photocatalytic Hydrogen Evolution

Author(s) :

Alwin, Emilia [Auteur]
Wojcieszak, Robert [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Kočí, Kamila [Auteur]
Edelmannová, Miroslava [Auteur]
Zieliński, Michal [Auteur]
Suchora, Agata [Auteur]
Pędziński, Tomasz [Auteur]
Pietrowski, Mariusz [Auteur]

Journal title :

Materials

Volume number :

15

Pages :

710

Publisher :

MDPI

Publication date :

2022-01-18

ISSN :

1996-1944

English keyword(s) :

metal photocatalysts
graphitic carbon nitride
wet impregnation method
photocatalytic activity
physicochemical characterization

HAL domain(s) :

Chimie/Matériaux
Chimie/Catalyse

English abstract : [en]

Pt, Ru, and Ir were introduced onto the surface of graphitic carbon nitride (g-C3N4) using the wet impregnation method. A reduction of these photocatalysts with hydrogen causes several changes, such as a significant increase ...
Show more >Pt, Ru, and Ir were introduced onto the surface of graphitic carbon nitride (g-C3N4) using the wet impregnation method. A reduction of these photocatalysts with hydrogen causes several changes, such as a significant increase in the specific surface area, a C/N atomic ratio, a number of defects in the crystalline structure of g-C3N4, and the contribution of nitrogen bound to the amino and imino groups. According to the X-ray photoelectron spectroscopy results, a transition layer is formed at the g-C3N4/metal nanoparticle interphase, which contains metal at a positive degree of oxidation bonded to nitrogen. These structural changes significantly enhanced the photocatalytic activity in the production of hydrogen through the water-splitting reaction. The activity of the platinum photocatalyst was 24 times greater than that of pristine g-C3N4. Moreover, the enhanced activity was attributed to significantly better separation of photogenerated electron–hole pairs on metal nanoparticles and structural distortions of g-C3N4.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Valorisation des alcanes et de la biomasse (VAALBIO)

Submission date :

2023-05-30T15:22:31Z
2023-06-22T15:50:48Z