摘要
由FeSO4·7H2O和NaBH4合成了纳米铁微粒,并用异辛酸进行表面包覆。采用X射线衍射能谱(XRD)、透射电子显微镜(TEM)、氧弹量热计和热分析测试技术表征了纳米铁微粒的结构、形貌及热性能。结果表明,制备的纳米铁微粒是体心立方晶系,颗粒呈球形,平均粒径100 nm,颗粒间呈粘连状。热性能研究表明,在25～600℃范围内,异辛酸修饰前后,产物的总增质量由22%提高至28%,表明异辛酸的修饰提高了纳米铁的抗氧化性能;异辛酸修饰的纳米铁粉的添加量对煤油燃烧热值影响的研究结果表明,纳米铁粉加入到煤油中且质量百分数小于1%时,可使煤油的燃烧热值提高最大234.08 J/g。
Fe nanoparticles were prepared by reducing Fe^2＋ salt in an ethanol solution with NaBH4 in the presence of 2 Ethy hexanoic acid as a surfactant. The structure, morphology and thermal properties of the iron nanoparticles were investigated by means of X-ray diffraction （XRD）, transmission electron microscopy （TEM）, oxygen bomb calorimeter and themogravimetry （TG）. The results showed that the crystal are bodycentered-cubic, the particles are spherical with an average size of approximate 100 nm, and there is conglutination among the particles. The thermal property studies indicated that the mass of Fe increased from 22% to 28%, before and after using surfactant in a temperature range of 25 - 600 ℃, which showed that the antioxidation properties was improved distinctly after using surfactant. When the amount of Fe in Kerosene was less than 1% （ mass ratio）, the combustion heat value of the Kerosene would be enhanced and the maximum was approximately 234.08 J/g.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第2期202-205,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(50701016)资助项目
关键词
液相还原法
纳米铁微粒
燃烧热
liquid chemical reduction method,iron nanoparticles, combustion heat
