Preparation and piezoelectric catalytic performance of HT-Bi2MoO6 microspheres for dye degradation

Abstract

HT-Bi2MoO6 microspheres were prepared by hydrothermal method and applied in piezoelectric catalytic degradation of dye. The crystallinity, morphology, optical property, and the surface chemical state of Bi2MoO6 catalyst were characterized by XRD, SEM, UV–vis and XPS techniques, respectively. The effects of catalyst preparation method, catalyst amount, dyes type and reaction conditions were investigated on the piezoelectric catalytic performance. The highest degradation ratio of 98.9% was achieved with 10 mg of HT-Bi2MoO6 catalyst after 45 min of piezoelectric catalytic vibration. In addition, a possible piezoelectric catalytic mechanism over HT-Bi2MoO6 catalyst has been proposed by active species trapping experiment. ·O2− and h+ are suggested to be the main active species in the piezoelectric catalytic process. These research results show that the HT-Bi2MoO6 catalyst with flower-like microspheres morphology consisting of nanosheets can effectively transform mechanical energy into electrical energy by vibration to generate reactive species for the degradation of dyes.