Jump to main content
Jump to site search

Issue 12, 2014
Previous Article Next Article

Ag2S/g-C3N4 composite photocatalysts for efficient Pt-free hydrogen production. The co-catalyst function of Ag/Ag2S formed by simultaneous photodeposition

Author affiliations

Abstract

Without Pt as cocatalyst, the photocatalytic hydrogen evolution activity of graphitic carbon nitride (g-C3N4) or even its composite is normally rather low (<1 μmol h−1). Exploring Pt-free cocatalysts to substitute precious Pt is of great importance in the photocatalytic field. In the present work, Ag2S-modified g-C3N4 (Ag2S/g-C3N4) composite photocatalysts were prepared via a simple precipitation method. The results demonstrated that the photocatalytic H2-production activity of g-C3N4 can be remarkably increased by the combination of Ag2S. The optimal Ag2S loading was found to be 5 wt%, giving a H2 production of 10 μmol h−1, around 100 times that of pure g-C3N4. The enhanced photocatalytic activity can be mainly attributed to the effective charge transfer between g-C3N4 and Ag/Ag2S, of which the latter is formed by simultaneous photodeposition in the photocatalytic H2 evolution reaction and acts as an efficient co-catalyst for the g-C3N4. This work showed the possibility for utilization of Ag2S or Ag/Ag2S as a substitute for Pt in the photocatalytic production of H2 using g-C3N4.

Graphical abstract: Ag2S/g-C3N4 composite photocatalysts for efficient Pt-free hydrogen production. The co-catalyst function of Ag/Ag2S formed by simultaneous photodeposition

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Dec 2013, accepted on 10 Jan 2014 and first published on 13 Jan 2014


Article type: Paper
DOI: 10.1039/C3DT53526F
Author version
available:
Download author version (PDF)
Dalton Trans., 2014,43, 4878-4885

  •   Request permissions

    Ag2S/g-C3N4 composite photocatalysts for efficient Pt-free hydrogen production. The co-catalyst function of Ag/Ag2S formed by simultaneous photodeposition

    D. Jiang, L. Chen, J. Xie and M. Chen, Dalton Trans., 2014, 43, 4878
    DOI: 10.1039/C3DT53526F

Search articles by author

Spotlight

Advertisements