期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 771, 期 -, 页码 821-826出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.308
关键词
ZrO2; Nanoparticle; Tetragonal; NaCl; Ultrasonic spray pyrolysis; Citrate precursor method
资金
- materials and parts technology development program - Korean Government Ministry of Trade, Industry Energy [10049555]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10049555] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Current synthesis processes for zirconia nanoparticles require expensive precursors or templates, complex steps and long reaction times, and produce highly agglomerated nanoparticles. In this study, we demonstrated a simple and continuous approach for synthesizing zirconia nanoparticles by combining a salt-assisted ultrasonic spray pyrolysis with a citrate precursor method. This process allows tuning of the morphology and size, where hollow sub-micron particles are transformed to minute nanoparticles by controlling (through a chelating reaction) the diffusion rate of zirconium cations in a pyrolysis step. The synthesized nanoparticles (average diameter: similar to 10 nm) are characterized by a highly crystalline tetragonal structure, uniform particle-size distribution, and high specific surface area. A detailed mechanism for generating tiny nanoparticles, via this process, is presented and the optical properties of the nanoparticles are evaluated through an ultraviolet-visible (UV-vis) diffuse reflectance spectrum and converted Kubelka-Munk function. (C) 2018 Elsevier B.V. All rights reserved.
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