| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 65634 | Journal of Molecular Catalysis A: Chemical | 2014 | 8 Pages |
•Novel Ag/AgCl/Zn-Cr LDHs photocatalyst was prepared by an anion-exchange method.•Ag/AgCl particles were uniformly grown on the surface of Zn-Cr LDHs materials.•Ag/AgCl/Zn-Cr LDHs shows the best activity in the photodegradation of RhB.•Holes and O2− are the two main reactive species for RhB degradation.•The photocatalytic mechanism was proposed.
A novel composite photocatalyst Ag/AgCl/Zn-Cr layered double hydroxides (LDHs) was prepared by a facile anion-exchange precipitation method. It was found that Ag/AgCl particles were uniformly grown on the surface of Zn-Cr LDHs materials on a large scale, and the composite shows well visible-light absorption ability. The photocatalytic degradation studies on Rhodamine B (RhB) indicate that Ag/AgCl/Zn-Cr LDHs composite shows enhanced visible-light photocatalytic abilities for degradation of organic pollutants than Ag/AgCl and Zn-Cr LDHs. The photocatalytic mechanism was analyzed by active species trapping experiments. It revealed that the h+ and O2− are the two main reactive species for RhB degradation by Ag/AgCl/Zn-Cr LDHs composite, and the proportion of h+ greatly increases compared to that of Ag/AgCl and Zn-Cr LDHs, indicating that an efficient charge separation is crucial for the enhancement of the photocatalytic activities. This work provides an approach to fabricate novel types of visible-light-induced composite photocatalysts for environment treatment.
Graphical abstractA novel composite photocatalyst Ag/AgCl/Zn-Cr LDHs was prepared by a facile anion-exchange precipitation method, which shows enhanced visible-light photocatalytic abilities for degradation of RhB.Figure optionsDownload full-size imageDownload high-quality image (164 K)Download as PowerPoint slide
