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http://dx.doi.org/10.5012/jkcs.2012.56.4.431

Dissipative Particle Dynamics Simulation on the Formation Process of CeO2 Nanoparticles in Alcohol Aqueous Solutions  

Zhang, Qi (School of Petrochemical Engineering, Jiangsu Province Key Lab of Fine Petrochemical Engineering, Changzhou University)
Zhong, Jing (School of Petrochemical Engineering, Jiangsu Province Key Lab of Fine Petrochemical Engineering, Changzhou University)
Yang, Bao-Zhu (School of Petrochemical Engineering, Jiangsu Province Key Lab of Fine Petrochemical Engineering, Changzhou University)
Huang, Wei-Qiu (School of Petrochemical Engineering, Jiangsu Province Key Lab of Fine Petrochemical Engineering, Changzhou University)
Chen, Ruo-Yu (School of Petrochemical Engineering, Jiangsu Province Key Lab of Fine Petrochemical Engineering, Changzhou University)
Liao, Jun-Min (Department of Chemistry, National Sun Yat-sen University)
Gu, Chi-Ruei (Department of Chemistry, National Sun Yat-sen University)
Chen, Cheng-Lung (Department of Chemistry, National Sun Yat-sen University)
Publication Information
Journal of the Korean Chemical Society / v.56, no.4, 2012 , pp. 431-439 More about this Journal
Abstract
Dissipative particle dynamics (DPD) was carried out to study the nucleation and crystal growth process of $CeO_2$ nanoparticles in different alcohol aqueous solutions. The results showed that the nucleation and crystal growth process of $CeO_2$ can be classified into three stages: nuclei growth, crystal stabilization and crystal aggregation except the initial induction stage, which could be reproduced by collecting simulation results after different simulation time. Properly selecting the sizes of $CeO_2$ and water bead was crucial in the simulation system. The influence of alcohol type and content in solutions, and precipitation temperature on the particle dimension were investigated in detail and compared with the experimental results. The consistency between simulation results and experimental data verify that the simulation can reproduce the macroscopic particle aggregation process. The effect of solvent on the nucleation and crystal growth of $CeO_2$ nanoparticles are different at three stages and can not be simply described by Derjaguin-Landau-Verwey-Overbeek (DLVO) theory or nucleation thermodynamics theory. Our work demonstrated that DPD methods can be applied to study nanoparticle forming process.
Keywords
Dissipative particle dynamics; $CeO_2$ Particle dimension; Alcohol content; Precipitation temperature;
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