Size-controlled synthesis of Rod-like alpha-FeOOH nanostructure

作者：Wei Chengzhen; Qiao Penghui; Nan Zhaodong^*

来源：Materials Science & Engineering C-Materials for Biological Applications, 2012, 32(6): 1524-1530.

DOI：10.1016/j.msec.2012.04.037

• Iron oxyhydroxides
• One-dimensional nanostructure
• Electrolyte
• Surfactants

One-dimensional goethite (alpha-FeOOH) nanorods were successfully fabricated by a hydrothermal route without any template. Experimental results reveal that concentrations of Fe3+ and ethylenediaminetetraacetic disodium salt (Na(2)EDTA) affect the phase composition and size of the as-synthesized products. The size of the rod-like alpha-FeOOH increased when the concentration of Na(2)EDTA was increased, where Na(2)EDTA acts as a nucleation inhibitor. alpha-Fe2O3 nanoparticles were produced when the concentration of Fe3+ was increased from 0.02 to 0.08 and 0.40 M. A possible formation mechanism was proposed based on the results of the time dependent experiments. Different electrolytes and surfactants can affect the size and the aspect ratio of the as-prepared nanorod-like alpha-FeOOH. Na2SO4 induced the decreasing of the size of the as-prepared sample. KCl and PVP affected the aspect ratio of the nanorods.

• 出版日期2012-8-1
• 单位扬州大学