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Synthesis of Ni base nanoparticles by W/O emulsion combustion
Journal of Nanostructure in Chemistry ( IF 10.1 ) Pub Date : 2019-07-04 , DOI: 10.1007/s40097-019-0309-6
Jun Kobayashi , Noriyuki Kobayashi , Yoshinori Itaya , Masanobu Hasatani

Abstract

To develop a process of fine particle production by spray pyrolysis, spray combustion of W/O (water-in-oil) emulsion, of which water phase was raw material solution and oil phase was fuel for heat source of high-temperature reaction field, was investigated. In this study, nickel oxide particles, which were a preliminary step of the nickel fine particle production, were synthesized and its structural characteristics were evaluated. Mixed solution of nickel nitrate and white kerosene was used as raw material. W/O emulsions were prepared using ultrasonic homogenizer and stirring these raw materials adding a surfactant. These emulsions were burning in a high temperature furnace to produce nickel oxide particles. The mean particle diameter of produced particles was less than 20 nm according to TEM observation. The diameter of the particles was much smaller than the estimated value based on the size distribution of dispersed solution phase in the emulsions and its concentration. Moreover, there is no effect of the concentration of the aqueous solution phase. On the other hand, X-ray diffraction pattern showed that the produced particles were complex of metal nickel with nickel oxide.

Graphic abstract



中文翻译:

W / O乳液燃烧合成Ni基纳米粒子

摘要

为了开发通过喷雾热解生产细粒的方法,对W / O(油包水)乳液进行喷雾燃烧,以水相为原料溶液,油相为燃料,作为高温反应场的热源,被调查了。在这项研究中,合成了镍细颗粒生产的第一步氧化镍颗粒,并对其结构特性进行了评估。以硝酸镍和白煤油的混合溶液为原料。使用超声均化器并搅拌这些原料并添加表面活性剂来制备W / O乳液。这些乳液在高温炉中燃烧产生氧化镍颗粒。根据TEM观察,所产生的颗粒的平均粒径小于20nm。基于乳液中分散溶液相的尺寸分布及其浓度,颗粒的直径远小于估计值。而且,水溶液相的浓度没有影响。另一方面,X射线衍射图表明所产生的颗粒是金属镍与氧化镍的络合物。

图形摘要

更新日期:2019-07-04
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