在浸没循环撞击流反应器(SCISR)中,以工业氧化锌和磷酸为原料,采用液-液相反应-沉淀法制备纳米磷酸锌。实验产品进行了X射线衍射(XRD)和电子透射显微镜(TEM)表征。探讨了反应物浓度、反应温度、反应时间及原料配比对收率的影响;初步确定制备纳米磷酸锌较适宜的工艺条件为:氧化锌溶液浓度0.86 mol/L,反应温度70℃,反应时间1 h,磷酸与氧化锌摩尔比0.67。XRD和TEM表征表明产品主要成分为Zn3(PO4)2.2H2O,平均粒径30—50nm。

Improvement on Producing Process of Preparing Nano-zinc Phosphate by Impinging Stream ReactionZHOU Yu-xin1,2,ZHU Hua-juan1,2,LI Zhe-lun1,2,ZHANG Juan1,2,WU Yuan1,2 (1.School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430073,China;2.Key Laboratory for Green Chemical Process of Ministry of Education,Wuhan 430073,China)Nano-zinc phosphate was prepared by liquid-liquid reaction-precipitation in the submerged circulating impinging stream reactor(SCISR) with commercial zinc oxide and phosphoric acid as the raw materials.The products were characterized by XRD and TEM.The influences of reactant concentration,reaction temperature,reaction time,and formula of the reactants on the yield were investigated,and the more appropriate conditions for preparation of nano-zinc phosphate were determined primarily as follows: ZnO concentration 0.86 mol/L,reaction temperature 70 ℃,reaction time 1 h,and the mole ratio of H3PO4/ZnO 0.67.The results of determination with XRD and TEM show that the major component in the product is Zn3(PO4)2·2H2O,and the average size of particles in the product is ranged 30 nm to 50 nm.impinging stream;nano-preparation;zinc phosphate;reaction-precipitation