A novel three-dimensional heterojunction photocatalyst for the photocatalytic oxidation of crystal violet and reduction of Cr6+

A novel 3-D heterojunction photocatalyst Ag2CO3/BiVO4 was successfully fabricated. It exhibits excellent photocatalytic performances for the photocatalytic oxidation of crystal violet and reduction of Cr6+, which is ascribed to the suppression of charge recombination, and increasing lifetime of the charge carriers confirmed by the result of time-resolved fluorescence emission decay spectra and photoelectrochemical measures. The electron spin resonance result also suggests that heterojunction structure can improve separation efficiency of photogenerated carriers and favor to form
- OH radicals. Moreover, ten intermediates and products for the photocatalytic oxidation degradation of crystal violet are identified by GC-MS.