Biotemplate synthesis and photocatalysis performance of multilayer porous ZnWO4 nano-photocatalyst with rose petals as template

ZnWO4 nano biomimetic crystalline with porous multi-layered structure was successfully prepared using rose petals as a biological template following by impregnation and calcination, and the effect of different amount of petals on crystal morphology and properties were investigated. The as-obtained samples were characterized by XRD, SEM, TEM and ultraviolet-visible (UV–vis) spectrophotometer. The results show that the product is pure ZnWO4 nano-multilayer porous crystallite with pore size distribution of 1–3 nm. The sample with the template dosage of 8 g exhibit the best photocatalytic activity, with the degradation rate of MB dye as high as 99.8% within 60 min.