Change in the morphology of ZnO nanoparticles upon changing the reactant concentration

Abstract

ZnO plays an important role in many technological aspects of semiconductors. Because of its interesting properties, it has attracted a great deal of attention for a wide range of applications. In this work, the direct precipitation method was employed for the synthesis of ZnO nanoparticles to study the role of different concentration ratios of reactants on the crystal structure, size, and morphology of the prepared ZnO nanoparticles. The reactant raw materials used in this experiment were zinc acetate dihydrate as a zinc source and NaOH. ZnO nanoparticles were synthesized by calcination of the ZnO precursor precipitates at 250°C for 3 h. These calcinated ZnO nanoparticles and their properties were characterized using X-ray diffraction, a scanning electron microscope equipped with an energy dispersive X-ray spectrometer, and transmission electron microscopy. We present the experiment conditions, including result on the different reactant concentration ratios, which affect the control of the size and morphology of the ZnO nanoparticles. The mean size of the ZnO nanoparticles was 18 nm.

Zinc Oxide Nanoparticles for Removal of Arsenic from Water

“…The obtained XRD patterns follow the indexed hexagonal wurtzite ZnO [10] and match the JCPDS data No. 36-1451 for wurtzite ZnO as well as results obtained by Hasnidawani et al [6] and Moazzen et al [11] for their ZnO samples.…”

“…With regards to parameter A (NaOH concentration), the increase in concentration during the synthesis would degrade the adsorption performance as this variation in the synthesis process would alter the morphology of the produced ZnO crystals and result in larger crystal size with less surface-to-volume ratios as described by Moazzen et al experiment [11].…”

Influence of OH−Ion Concentration on the Surface Morphology of ZnO-SiO2Nanostructure

“…Tailoring the morphology, shape, and size of ZnO could be a way of expanding its potential especially in solar cell and sensor technologies where reaction at the surface is very crucial. Works have been reported for controlling size and shape of ZnO nanostructures like varying the initial zinc and hydroxyl ion concentrations [5,6] and also by introducing silica (SiO 2 ) to ZnO as a concept of composite material [7,8]. With good mechanical resistance and high dielectric strength, SiO 2 is likely to be an ideal component to enhance the properties of ZnO.…”

Structural Evaluation and Photocatalytic Performance of Chemically Synthesised ZnO Nanoparticles

“…As size and shape dependence is a very crucial property of nanomaterials, various methods have been employed for the synthesis of ZnO nanostructures with different shapes and properties 14 . Based on shape, numerous ZnO nanostructures have been reported, such as nanoparticles 15 , nanorods 16 , nanocombs 17 , nanowires 18 , nanotubes 19 , nanoflowers 20 , etc. Among these, ZnO nanoparticle with the presence of oxygen vacancy can effectively reduce Methylene Blue (MB) dye in water 21 .…”

“…ZnO nanoparticles materials were prepared by direct precipitation method described by Borghei et al, 15 with some modifications. In a typical synthetic procedure, solution of equal volume of Zinc acetate dihydrate and sodium hydroxide were prepared separately in distilled deionized water at a ratio of the concentrations 1:2 (zinc acetate dehydrate : sodium hydroxide).…”