Precipitation of Uniform ZnO Particles with Controllable Layered Structure from Aqueous Solutions
Abstract:Zinc nitrate precipitated with NaOH solution under double-jet conditions produced uniform nanostructured zinc oxide particles containing stacked nanoplates at 80 °C in the presence of starch sodium octenyl succinate (SSOS). In the absence of SSOS, nonuniform agglomerated ZnO particles and hexagonal nanorods were obtained. The presence of SSOS provided important hints on particle formation and confirmed that submicronic particles resulted from nanocrystals oriented aggregation. The formation kinetics of layered structures was followed by SEM observations, suggesting that they result from a rapid aggregation of about 40nm primary nanoparticles followed by rearrange into organized layered structures. Oxide materials with this shape are especially interesting for catalytic, piezoelectric and sensing applications. The stacked ZnO exhibits a surprisingly good activity for aqueous photocatalytic decompositions of 4-chlorophenol under visible light.
Document Type: Research Article
Publication date: April 1, 2010
More about this publication?
- Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.