一种新型球状纳米氧化铁的制备  

Preparation of a Novel Spherical Nano-sized Iron Oxide

作　　者：郝素菊 高一策 蒋武锋 孙天昊 张玉柱 HAO Suju;GAO Yice;JIANG Wufeng;SUN Tianhao;ZHANG Yuzhu(School of Metallurgy and Energy,North China University of Science and Technology,Ministry of Education Key Laboratory of Modern Metallurgy Technology,Tangshan 063009,China)

机构地区：[1]华北理工大学冶金与能源学院现代冶金技术教育部重点实验室,唐山063009

出　　处：《材料研究学报》2022年第12期887-892,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51274084);河北省自然科学基金(E2018209323和E2022209125)。

摘　　要：以Fe(NO_(3))_(3)·9H_(2)O为原料、以尿素为沉淀剂,用热解前驱体法制备出直径为40~60 nm的球状纳米氧化铁。使用XRD、SEM和EDS等手段对其表征,研究了Fe^(3+)浓度、反应温度等因素对纳米氧化铁的粒径和形貌的影响、确定了球状纳米氧化铁的制备条件并分析了球状纳米氧化铁的形成机理。结果表明:随着Fe(NO_(3))_(3)·9H_(2)O溶液温度的提高纳米氧化铁的结晶度随之提高、粒径增大。Fe(NO_(3))_(3)·9H_(2)O的浓度对纳米氧化铁样品的粒度和形貌的影响不大。球状氧化铁纳米的形成机理是:铁源在水热条件下水解和结晶生成棕黄色絮状沉淀FeOOH,FeOOH在高温高压条件下溶解和再结晶生成了球状纳米氧化铁。A novel spherical nano-ferric oxide of 40~60 nm in diameter was prepared by pyrolysis precursor method,with Fe(NO_(3))_(3)·9H_(2)O as raw material and urea as precipitator.The prepared spherical nano-sized ferric oxide was characterized by XRD,SEM and EDS.The effect of Fe^(3+)concentration,reaction temperature and other factors on the particle size and morphology of nano-sized ferric oxide were investigated.The preparation conditions of nano-sized ferric oxide were determined and the formation mechanism of nano-sized ferric oxide was also analyzed.The results show that the crystallinity and particle size of nano-sized ferric oxide increase with the increase of temperature.The concentration of Fe(NO_(3))_(3)·9H_(2)O has little effect on the particle size and morphology of the prepared nano-sized iron oxide.The formation mechanism of spherical ferric oxide nanoparticles is as follows:the iron source hydrolysates and crystallizes under hydrothermal conditions to generate brownish yellow flocculant precipitation FeOOH,and FeOOH dissolves and recrystallizes in conditions of high temperature and high pressure further to generate spherical ferric oxide nanoparticles.

关 键 词：金属材料 球状纳米氧化铁 热解前驱体法 九水硝酸铁 

分 类 号：TB31[一般工业技术—材料科学与工程]