Decoration of mesoporous graphite-like C₃N₄ nanosheets by NiS nanoparticle-driven visible light for hydrogen evolution

verfasst von

Mohammad W. Kadi, Reda M. Mohamed, Adel A. Ismail, Detlef W. Bahnemann

Abstract

Separation of photogenerated electrons from holes is an important factor that increases hydrogen evolution rate in the water splitting reaction. This recombination prevention can be achieved by co-catalyst’s deposition onto the semiconductor material’s surfaces. In this contribution, synthesis of mesoporous C

₃N

₄ of graphite-like structure by a combustion technique employing high mesoporous silica as a template has been achieved. Subsequently, NiS nanoparticles were decorated as g-C

₃N

₄ nanosheets at various NiS contents (5–20%). the photocatalytic efficiency of the prepared NiS/g-C

₃N

₄ nanocomposites was investigated and compared with those of pure NiS and g-C

₃N

₄ for evolution of hydrogen using glycerol as a scavenger upon visible light illumination. The findings indicated that the content of deposited NiS nanoparticles onto g-C

₃N

₄ is significant in the enhancement of the photocatalytic response of g-C

₃N

₄. 15% NiS/g-C

₃N

₄ nanocomposite is the optimized photocatalyst and its photocatalytic activity is larger than both NiS and g-C

₃N

₄ by about 48 and 114 times, respectively. 15% NiS/g-C

₃N

₄ nanocomposite has photocatalytic stability up to five times. The enrichment of the photocatalytic efficiency of NiS/g-C

₃N

₄ photocatalyst could be attributed to the presence of NiS nanoparticles as co-catalyst, which enables efficient charge carrier separation of g-C

₃N

₄, mesostructure, large surface area and narrow band gap.

Organisationseinheit(en)

Institut für Technische Chemie

Externe Organisation(en)

King Abdulaziz University
Central Metallurgical Research and Development Institute, Cairo
Staatliche Universität Sankt Petersburg

Typ

Artikel

Journal

Applied Nanoscience (Switzerland)

Band

8

Seiten

1587-1596

Anzahl der Seiten

10

ISSN

2190-5509

Publikationsdatum

08.2018

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Biotechnologie, Atom- und Molekularphysik sowie Optik, Werkstoffwissenschaften (sonstige), Physikalische und Theoretische Chemie, Zellbiologie, Elektrotechnik und Elektronik

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1007/s13204-018-0835-4 (Zugang: Geschlossen)