Tailoring morphology and bulk density of magnesium ethoxide particles by adding n-hexane and silicone oil

• 作者: Zhou Lan Yangcheng Lu
• 来源期刊: 颗粒学报（英文版）
• 年，卷（期）: 2020,（6）
• 页码范围: 168-174
• 页数: 7页
• 语种: 英文

摘要

In this work,we used the inert substances silicone oil and n-hexane to modulate the solvent environment,and in so doing tailor the preparation of magnesium ethoxide(Mg(OEt)2)particles.We found the follow-ing:(1)nonpolar n-hexane mainly modulates the polarity of the solvent to control the precipitation rate and size of the Mg(OEt)2 seeds,thereby triggering accelerated nucleation to form small primary particles;and(2)silicone oil(relatively high polarity and viscosity)facilitates the growth and agglomeration stage,to improve inter-particle dispersion and obtain relatively uniform Mg(OEt)2 particles.We summarized these findings in a common mechanism for preparing Mg(OEt)2 particles with uniform morphology,small size,and high bulk density as per the synergistic effect of n-hexane and silicone oil.The ratios of silicone oil and n-hexane are flexible,and afford various regular and well-dispersed Mg(OEt)2 particles that are 5-30 μm in size and 0.2-0.7 g/cm3 in bulk density.The nanoparticles thus have the potential to serve in diverse applications such as catalysis.