We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Reductive Modification of Carbon Nitride Structure by Metals—The Influence on Structure and Photocatalytic Hydrogen Evolution.
- Authors
Alwin, Emilia; Wojcieszak, Robert; Kočí, Kamila; Edelmannová, Miroslava; Zieliński, Michał; Suchora, Agata; Pędziński, Tomasz; Pietrowski, Mariusz
- Abstract
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.
- Subjects
METAL nitrides; NITRIDES; METAL nanoparticles; X-ray photoelectron spectroscopy; IMINO group; NITROGEN; PHOTOCATALYSTS
- Publication
Materials (1996-1944), 2022, Vol 15, Issue 3, p710
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma15030710