A composite ZnIn2S4@ZrDP: preparation and high catalytic activities in some photodegradation reactions

Abstract

A kind of zirconium phosphonate ZrDP with rigid multi nitrogen heterocycle and multilevel pores in its framework was used to construct a composite ZnIn2S4@ZrDP by in-situ surface loading ZnIn2S4 in the study, and multi-nitrogen heterocyclic in the carrier might promote the absorption and transfer energy to ZnIn2S4 to accelerate separation of electron-hole pairs in the semiconductor. ZnIn2S4 was dispersed on the surface of ZrDP uniformly, which increased negative charge density of the composite, enlarged adsorption capacity to the cationic materials and promoted absorption to light. Compared to ZnIn2S4, ZnIn2S4@ZrDP was found to have high catalytic activities and good recyclability in photodegradation reactions to some cationic dyes, such as Methylene Blue, Rhodamine B, Methyl Orange and Malachite Green, and Rhodamine B could be degraded completely under mild conditions. •O2- and h+ produced in the reaction were found to be main sources of the oxidation activities.