Preparation and photoelectric properties of Bi2WO6-CdS hybrid nanocrystals.

The poly sodium polyacrylate (PAANa) latex particles containing hybrid nanocrystals of bismuth tungstate-cadmium sulfide (Bi 2 WO 6 -CdS) were prepared by the combination process of inverse miniemulsion, absorption, and solvothermal treatment. The Bi 2 WO 6 -PAANa latex particles and CdS-PAANa latex particles were prepared by inverse miniemulsion polymerization for formation of CdS based on Bi 2 WO 6 (Bi 2 WO 6 /CdS) and Bi 2 WO 6 based on CdS (CdS/Bi 2 WO 6) hybrid nanocrystals, respectively. The effects of dropping strategies in absorption and solvothermal treatment condition on the size, their distribution and the morphologies of Bi 2 WO 6 /CdS-PAANa and CdS/Bi 2 WO 6 -PAANa latex particles were investigated. The dropping in order was better than simultaneous dropping in absorption process. The clustered Bi 2 WO 6 /rod-like CdS and the punctate CdS/punctate Bi 2 WO 6 hybrid nanocrystals could be grown under the same solvothermal conditions. The influences of cadmium sulfate/sodium sulfide (CdSO 4 /NaS) millimolar number on the grain size and the morphologies of Bi 2 WO 6 /CdS hybrid nanocrystals were investigated. With the CdSO 4 /NaS millimolar number increase, the grain size of CdS rod-like and Bi 2 WO 6 cluster gradually increased due to oriented attachment and Ostwald ripening, respectively. The Bi 2 WO 6 -CdS hybrid nanocrystals will perform the excellent photoelectric properties. [ABSTRACT FROM AUTHOR]