The surface anchoring of CdS on the surface of Ag3PO4 nanoparticle is achieved by an electrostatically-derived assembly between negatively-charged Ag3PO4 nanoparticles and positively-charged CdS quantum dots (QDs). The composite formation between Ag3PO4 and CdS nanoparticles gives rise not only to an enhancement of visible light absorption but also to a notable depression of photoluminescence signal, confirming the strong electronic coupling between the two components. The present CdS@Ag3PO4 nanocomposite displays higher visible light photocatalytic activity than do the precursors Ag3PO4 and CdS, demonstrating the usefulness of electrostatically-derived assembly in exploring highly efficient photocatalyst material.
Bibliographical noteFunding Information:
This work was supported by Korea Ministry of Environment as “Converging Technology Project” ( 191-101-001 ) and by the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy (Grant No. 10041232 ). The experiments at PAL were supported in part by MOST and POSTECH. The authors thank Prof. T.H. Hyun (SNU, Korea) for helping them collect the TEM data.
- Colloidal processing