Synthesis of CdMoO4 microspheres by self-assembly and photocatalytic performances

Abstract

The role of Cl on the formation of CdMoO₄ microspheres were elucidated in detail. As chloride was taken into the hydrothermal process, CdMoO₄ microspheres were successfully obtained. The Cl absorbed on the surface of the CdMoO₄ microspheres could inhibit the Ostwald ripening process of CdMoO₄ microspheres and it could retard the process of CdMoO₄ microspheres transforming to CdMoO₄ particles. The CdMoO₄ microspheres obtained at 240 °C were the smallest and most porous, which meant a relatively large reaction area. So the photocatalytic activity of CdMoO₄ microspheres obtained at 240 °C was the best of all. Kinetic studies using the radical scavenger technologies suggested that OH˙ was not the dominant photooxidant. Direct hole photooxidation was responsible for the CdMoO₄ microspheres photocatalysis.