Kinetics-Controllable Hetero-Precipitation Process on the Nanoscale Solid-Liquid Interface of Spherical Particles

Abstract:

Based on the growth kinetics of the SiO₂ particles, we studied the kinetic hetero-precipitation process on the interface of polystyrene (PS) microscale particles. The nanoscale SiO₂ shell thickness increased with increasing time and was proportional to the square root of the initial concentration of TEOS precursor while governed by hetero-precipitation process. Moreover, the hetero-precipitation process followed the first-order growth mechanism of silica onto the surface of templating PS pariticles. Properly controlling the reagent concentrations could alleviate and even avoid, to a certain extent, aggregation among PS@SiO₂ particles that could otherwise have an adverse effect on the properties and applications of those composite particles and the corresponding SiO₂ hollow products.

• Periodical: Materials Science Forum (Volume 688)
• Pages: 45-50
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.688.45
• Online since: June 2011
• Authors: Xiao Feng Wu, Yu Chao Liao, Ren Liang Yue, Yun Fa Chen
• Keywords: Core-Shell Nanostructure, Dynamic Control, Hetero-Precipitation

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