Zn+2HNO3=ZN(NO3)2+H2箭头 哪不正确 酸雨对铝制窗框,铜塑像,大理石围栏,柏油路面 为什么大理石强?

To Na2WO4. 2H2O and Zn (NO3) 2.6 H2O as raw material, adopting hydrothermal legal system for the ZnWO4 nanocrystalline catalysts. To Shu red B as the goal, studied degradants ZnWO4 catalyst photocatalytic performance, discusses the heat and water temperature, hydrothermal time and hydrothermal solution pH value of crystal morphology and ZnWO4 catalyst photocatalytic activity of the influence law, the result shows: in acidic condition for the preparation of ZnWO4 patchy distribution structure, chain in alkaline conditions for rod structure. In 180 ℃, 24 h preparation conditions, ZnWO4 catalyst shows the highest photocatalytic activity. Hydrothermal solution pH = 5 and pH = 8 preparation of catalysts in 2 to 5 mg/h L within the Shu red B solution determined.the decolored rate achieved respectively 86% and 95%. During the preparation of solution of pH value, the catalyst of amorphous and specific surface area is the effect of catalyst activeness of important factor.