Designing of hollow AgI spheres by ultrasonic spray pyrolysis

A theoretical model which describes the mechanism of droplet formation, structures of the complexes used in the precursor solution and hollow AgI particles prepared by the process of ultrasonic spray pyrolysis (USP) was investigated. Theoretical approaches described very well the properties of silve...

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Bibliographic Details
Published in:Journal of aerosol science 2012-12, Vol.54, p.13-20
Main Author: VALIDZIC, Ivana Lj
Format: Article
Language:English
Subjects:
Aerosols
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Halides
Nano-clusters
Scanning electron microscopy
Semiconductors
Ultrasonic spray pyrolysis
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Summary:A theoretical model which describes the mechanism of droplet formation, structures of the complexes used in the precursor solution and hollow AgI particles prepared by the process of ultrasonic spray pyrolysis (USP) was investigated. Theoretical approaches described very well the properties of silver iodide particles collected and aged in 2-propanol after the USP process. The morphology of hollow silver iodide particles aged in 2-propanol was found to be connected with the mechanism of surface precipitation caused by low precursor density. In addition, the structures of small complexes used are directly connected with structural changes in the synthesized hollow AgI particles. The proposed model and experimental results imply that the structure of the starting thermodynamically stable AgI complexes, used for the first time as a precursor solution, affects the final particle structure. ► The structures of complexes used are directly connected with structural changes of AgI particles. ► The morphology of hollow AgI was found to be connected with mechanism of surface precipitation. ► AgI powder particles are complex constitution, built from sub-particles and clusters.
ISSN:0021-8502
1879-1964
DOI:10.1016/j.jaerosci.2012.07.007