Effects of different operating parameters on the particle size of silver chloride nanoparticles prepared in a spinning disk reactor
Effects of different operating parameters on the particle size of silver chloride nanoparticles prepared in a spinning disk reactor
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DOI：
10.1007/s00339-015-9174-4
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发表时间：
2015-07-01
影响因子：
2.7
通讯作者：
Ahmadpour, Ali
中科院分区：
文献类型：
--
作者：
Dabir, Hossein;Davarpanah, Morteza;Ahmadpour, Ali
本研究的目的是提出一种利用旋转盘反应器大规模生产氯化银纳米粒子的实验方法。以硝酸银和氯化钠为原料，明胶为保护剂。实验以连续模式进行，将反应物注入旋转盘表面，在旋转盘表面发生化学沉淀反应，形成AgCl颗粒。考察了过饱和、圆盘转速、反应物流速、圆盘直径和过量离子等操作变量对产物粒度的影响。此外，通过扫描电镜、x射线能谱和x射线衍射对AgCl纳米颗粒进行了表征。结果表明，在较高的过饱和度和较高的圆盘转速下，得到的AgCl颗粒较小。此外，在我们的研究范围内，使用较低的反应物流速和较大的圆盘直径可以降低产品的粒度。反应物的非化学计量条件对颗粒聚集的减少有显著影响。通过优化操作条件，可以制备均匀的AgCl纳米颗粒，平均尺寸约为37 nm。
The aim of this research was to present an experimental method for large-scale production of silver chloride nanoparticles using spinning disk reactor. Silver nitrate and sodium chloride were used as the reactants, and the protecting agent was gelatin. The experiments were carried out in a continuous mode by injecting the reactants onto the surface of the spinning disk, where a chemical precipitation reaction took place to form AgCl particles. The effects of various operating variables, including supersaturation, disk rotational speed, reactants flow rate, disk diameter, and excess ions, on the particle size of products were investigated. In addition, the AgCl nanoparticles were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. According to the results, smaller AgCl particles are obtained under higher supersaturations and also higher disk rotation speeds. Moreover, in the range of our investigation, the use of lower reactants flow rates and larger disk diameter can reduce the particle size of products. The non-stoichiometric condition of reactants has a significant influence on the reduction in particle aggregation. It was also found that by optimizing the operating conditions, uniform AgCl nanoparticles with the mean size of around 37 nm can be produced.