Preparation of α-nanometer Iron Oxide by Microwave Hydrolysis
-
摘要: 以FeCl3为原料,三乙烯四胺(TETA)为配位剂,采用微波水解法制备α-纳米Fe2O3。并运用激光粒度仪、FT-IR、UV-Vis对所得产物进行结构和性质的分析比较。结果表明,微波照射能迅速制备粒径小而均匀的纳米粒子,缩短陈化时间。微波水解法中,微波加热时间14 min及nTETA∶nFeCl3=40∶100(摩尔比)为最佳条件,在此条件下制备的纳米α-Fe2O3粒径小而均匀。纳米Fe2O3的红外光谱在580 cm-1和480 cm-1附近的特征吸收峰随着粒径的减小发生红移,而紫外光谱在480 nm和330~350 nm附近两个吸收峰受量子尺寸效应的影响随粒径变小发生蓝移。Abstract: Herein,nano α-Fe2O3 was synthesized through microwave assisted hydrolysis method with FeCl3 as raw material,triethylenetetramine（TETA） as ligand.The properties of the nano α-Fe2O3 products were analyzed and compared through laser particle size analyzer,FT-IR,and UV-Vis spectra.Microwave assisted hydrolysis method has advantages in yielding smaller and uniform nano particles in shorter time and without aging time.In the latter method,microwave heating time of 14 min and nTETA∶nFeCl3=40∶100 are the best conditions,under which smaller and uniform nano α-Fe2O3 particles can be achieved.In the FT-IR spectra of nano α-Fe2O3,two characteristic absorption peaks at ca.580 and 480 cm-1 red-shift with the particle size decreasing.Because of quantum size effect,blue shifting in the characteristic absorption peaks at ca.480 nm and ranging 330～350 nm in UV-Vis spectra depend on the decrease of the particle size.
-
Key words:
- α-Fe2O3 /
- nanoparticle /
- microwave assisted hydrolysis method /
- particle size
-
点击查看大图
计量
- 文章访问数: 22
- HTML全文浏览量: 6
- PDF下载量: 1
- 被引次数: 0
下载:
