Synthesis of magnesium hydroxide and oxide nanoparticles using a spinning disk reactor
Synthesis of magnesium hydroxide and oxide nanoparticles using a spinning disk reactor
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DOI：
10.1021/ie060869b
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发表时间：
2007-08-15
影响因子：
4.2
通讯作者：
Liu, Hwai-Shen
中科院分区：
文献类型：
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作者：
Tai, Clifford Y.;Tai, Chia-Te;Liu, Hwai-Shen
本研究的目的是利用旋转圆盘反应器合成纳米氢氧化镁，并将其进一步煅烧形成氧化镁。通过将MgCl 2和NaOH的两种水溶液分别连续泵入反应器的室中来制备氢氧化镁，在反应器的室中发生液-液反应以形成Mg（OH）（2）。考察了转速、反应物浓度、反应物流速等操作参数对纳米氢氧化镁粒径的影响。氢氧化镁的粒径随着流速的增加而增加，但随着反应物浓度的变化而保持相当恒定。就尺寸和均匀性而言，片状氢氧化镁颗粒的最佳长度为50-80 nm，厚度为10 nm。对氢氧化镁煅烧产物的颗粒形貌和粒度进行了分析。采用层状氢氧化钙法制备了30-70 nm的氧化镁多面体纳米粒子。
The aim of this research was to synthesize magnesium hydroxide nanoparticles, which were further calcined to form magnesium oxide, using a spinning disk reactor. Magnesium hydroxide was prepared by continuously pumping two aqueous solutions of MgCl2 and NaOH, respectively, into the chamber of the reactor, where a liquid-liquid reaction took place to form Mg(OH)(2). The effects of various operating variables, including the rotation speed, reactant concentration, and liquid flow rate of the reactants, on the size of magnesium hydroxide nanoparticles were investigated. The particle size of magnesium hydroxide increased as the flow rate increased, but remained quite constant as the reactant concentration varied. As far as size and uniformity were concerned, the best lamellar magnesium hydroxide particles were 50-80 nm in length and 10 nm in thickness. The particle morphology and size of magnesium oxide calcined from produced magnesium hydroxide were also analyzed. Polyhedral nanoparticles of 30-70 nm magnesium oxide were obtained by calcinating lamellar hydroxide.