Jump to main content
Jump to site search

Issue 4, 2015
Previous Article Next Article

Amorphous Co3O4 modified CdS nanorods with enhanced visible-light photocatalytic H2-production activity

Author affiliations

Abstract

In this work, amorphous Co3O4 modified CdS nanorods were synthesized by a two-step solvothermal/hydrothermal method, and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy, UV-visible spectroscopy, nitrogen absorption and X-ray photoelectron spectroscopy. The photocatalytic performance of the as-synthesized Co3O4–CdS nanorods was evaluated through H2 generation from an aqueous solution containing sulfide and sulfite under visible light (λ ≥ 420 nm). The results showed that the photocatalytic activity of CdS nanorods for H2 evolution could be significantly enhanced by loading the amorphous Co3O4. The optimal Co3O4 loading was found to be approximately 3.0 mol%. The as-prepared CdS nanorods with 3 mol% Co3O4 exhibited the highest photocatalytic activity for H2 evolution under visible light irradiation, 236 μmol g−1 h−1, which is 33-fold higher than that of the pristine CdS nanorods. Furthermore, the co-loading of 1 wt% Pt can lead to another three times enhancement in the photocatalytic H2-production activity. The mechanism for the enhanced H2-production performance of Co3O4–CdS nanorods was discussed. The excellent performance of Co3O4–CdS nanorods is mainly ascribed to the loading of amorphous Co3O4 onto the surface of CdS nanorods, which could promote the separation of electron–hole pairs and enhance the stability of CdS nanorods due to the formation of p–n heterojunctions between the Co3O4 and CdS nanorods, thus leading to an enhanced activity for H2 generation. This work demonstrated that the loading of amorphous Co3O4 is a facile strategy to enhance the photocatalytic activity of CdS nanorods, which may provide some potential opportunities for designing other composite photocatalysts for water splitting.

Graphical abstract: Amorphous Co3O4 modified CdS nanorods with enhanced visible-light photocatalytic H2-production activity

Back to tab navigation

Publication details

The article was received on 20 Oct 2014, accepted on 14 Nov 2014 and first published on 19 Nov 2014


Article type: Paper
DOI: 10.1039/C4DT03197K
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2015,44, 1680-1689
  •   Request permissions

    Amorphous Co3O4 modified CdS nanorods with enhanced visible-light photocatalytic H2-production activity

    J. Yuan, J. Wen, Q. Gao, S. Chen, J. Li, X. Li and Y. Fang, Dalton Trans., 2015, 44, 1680
    DOI: 10.1039/C4DT03197K

Search articles by author

Spotlight

Advertisements