摘要
In this study,a facile alcoholysis method was developed to synthesize BiOCI_(x)Br_(1_x)nanoplates at room temperature and atmospheric pressure.In this route,strong acid or alkaline environment was absolutely avoided to realize the high exposure of{001}crystal facets.The regular changes in XRD peaks and cell parameters as a function of the Br content strongly declared that the obtained BiOCIxBrl_x products belonged to a group of solid solutions.The 2D nanosheets with in-plane wrinkles were clearly observed in TEM images.Interestingly,as the Br content increased,band gaps of BiOCI_(x)Br_(1_x)solid solutions gradually decreased.The photocatalytic degradation of RhB under simulated sunlight irradiation indicated that BiOCI0.sBr0.5 had the best photocatalytic activity.From the viewpoint of crystal chemistry,the photocatalytic activity of BiOCI_(x)Br_(1_x)solid solutions was closely related with the exposure amount of{001}facets,interlayer spacing of(001)plane and energy-level position of valence band.
