电喷雾和二步热处理制备无硬团聚纳米氧化锌

Fabrication of Agglomerate-free ZnO Nanoparticles by Electrospraying and Subsequent Two-step Heat Treatment

通过电喷雾和二步热处理法制备得到无硬团聚的ZnO纳米微粒,为制备无硬团聚氧化物纳米粉体提供了一种新方法.试验采用添加适量PVP的Zn(CH3COO)2·2H2O的乙醇溶液作为电喷雾液体,经过锥形喷雾得到均匀的微米级小液滴.干燥后的喷雾产物先后在氮气炉和空气炉中分别600℃和400℃保温1h进行二步热处理.SEM、XRD测试结果表明,使用该方法制备得到的ZnO纳米微粒粒度均匀,结晶完整,无硬团聚,具有六角纤锌矿结构.

Agglomerate-free ZnO nanoparticles were prepared by electrospraying and subsequent two-step heat treatment,providing a novel way for the fabrication of agglomeratefree oxide nanopowders.Using Zn（CH3COO）2·2H2O ethanol solution added proper polyvinylpyrrolidone as electrosprayed liquid,a cone-jet was successfully formed that produced symmetrical micron droplets.The electrosprayed products were dried then.Agglomerate-free ZnO nanoparticles were derived after annealing the dried electrosprayed products in nitrogen at 600℃ for 1h followed by annealing in air at 400℃ for 1h.Results of SEM and XRD tests demonstrate that the as-prepared ZnO nanoparticles are well developed with a uniform size,and a hexagonal wurtzite structure.