中文摘要：

报道了一种不同尺寸多孔六边形α-Fe2O3纳米颗粒的简单、高产合成方法。对所合成的多孔纳米材料进行了X射线衍射、X射线光电子谱、激光喇曼光谱、场发射扫描电镜和透射电子显微镜的表征。所得结果都表明所合成出来的样品为高选择性的多孔六边形α-Fe2O3纳米颗粒。通过系统地控制实验条件,研究了反应时间、铁盐的种类、反应物的起始浓度对所合成样品的影响。通过对所得实验结果的系统对比和分析,给出了该种结构α-Fe2O3纳米颗粒的形成机制。因而,在此报道了一种简单（仅需FeCl3.6H2O和NH4HCO3两种反应物）、一步、经济、可重复性高的多孔六边形α-Fe2O3纳米颗粒的高产合成方案,并且该方案不需要使用任何有机溶剂。

英文摘要：

A simple method was proposed to synthesize different sizes of porous hexagonal α-Fe2O3 nanoparticles in large-scale.The as-prepared material was characterized by the X-ray diffraction,X-ray photoelectron spectroscopy,Raman spectroscopy,field-emission scanning electron microscopy and transmission electron microscopy（TEM）.These results indicate that the obtained sample is high selectivity of porous hexagonal α-Fe2O3 nanoparticles.By controlling the experimental conditions systematically,the influences of the reaction time,iron source,initial concentration of the reactant on the synthetic samples were studied.Based on the systematic comparison and analysis of the experimental results,the formation mechanism of α-Fe2O3 nanoparticles was given.Therefore,a simple（only two reagents,viz.FeCl 3.6H2O and NH4HCO3,are required）,one-step,inexpensive,and highly reproducible method was reported for the largescale synthesis of porous hexagonal α-Fe2O3 nanoparticles,and there is no need of using any organic solvents in this approach.