Investigation of BiVO₄ structure variations on the dichlorotoluene ammoxidation performance

Abstract

In this study, BiVO 4 synthesized by hydrothermal and calcination methods were explored as catalysts in the ammoxidation of dichlorotoluenes to shed light on the structure-reactivity correlations. The BiVO 4 samples were characterized by X-ray diffraction (XRD), temperature-programmed reduction (TPR), Brunauer-Emmett-Teller (BET), and UV-Vis spectrophotometry. The results showed that the catalytic activity of BiVO 4 greatly relied on the structure variations. The hydrothermal prepared BiVO 4 exhibited better catalytic activities as a consequence of its greater structure deformation, with maximum yields of 73.1, 72.2, and 70.8% for 3,4-, 2,4-and 2,6-dichlorobenzonitrles, respectively.