石墨包覆纳米铁材料稳定性初步研究  

A preliminary study on the stability of graphene coated nano-iron

作　　者：曹宏[1] 马恩宝[1] 宾晓蓓[2] 王学华[1] 

机构地区：[1]武汉化工学院材料科学与工程学院,湖北武汉430074 [2]武汉理工大学资源与环境学院,湖北武汉430070

出　　处：《武汉化工学院学报》2006年第1期42-46,共5页Journal of Wuhan Institute of Chemical Technology

基　　金：湖北省教育厅优秀中青年项目(2003B001);湖北省自然科学基金项目(2004ABA090)

摘　　要：以二阶F eC l3石墨层间化合物为前驱体,制备了石墨结构层包覆纳米铁复合材料(GCN I).从应用角度出发,考察了GCN I在不同气氛中的热稳定性和在不同溶液中的稳定性.热分析表明:GCN I在氮气氛中710℃以下有良好的热重稳定性,710℃以后KC l气化逸出,缓慢失重.空气中520℃以后快速失重,这与表层石墨被氧化从而加快KC l逸出有关.GCN I在N aOH溶液、乙醇、丙酮、CC l4中的稳定性良好;在双氧水、四氢呋喃(THF)和高温沸水中存在KC l脱出现象,在硝酸、硫酸中的稳定性最差.考查了不同溶液对GCN I中铁和氯化钾的晶粒度的影响,结果表明,盐酸和双氧水的影响最大,前者使铁和KC l的平均晶粒度分别由17.03 nm,12.48 nm变为11.92 nm,23.18 nm,后者使之变为19.17 nm和9.54 nm.Second stage FeCl3-graphite intercalation compounds was used as raw stuff to synthesize grapheme coated nanoiron （GCNI）. We have tested thermal stability and stability in different GCNI liquid. Results show that in nitrogen GCNI has good stability below 710℃, and its weight lost slowly after 710℃ for KCl in it vaporized and escaped; in air, its weight lost faster after 520℃ because oxygenation of outside graphene quicken the velocity of KCI＇s escape. In liquid, stability of GCNI is relatively good in HCl, NaOH, alcohol and CCl4; less in H2O2, THF and the hot water（180 C）, for KCl has been removed form graphite lays; worst in HNO3 and H2SO4. Meanwhile we studied the influence of different environment to the crystal size of iron and KCl. Result shows that HCl and H2O2 have great effect, HCl changed crystal size of iron and KC; from 17.03 nm and 12.48 nm to 9.17 nm and 9.54 nm, H202 changed them to 11.92 nm 23.18 nm.

关 键 词：石墨 铁 纳米 稳定性 

分 类 号：TQ13[化学工程—无机化工]