Size-controlled synthesis, magnetic property, and photocatalytic property of uniform alpha-Fe2O3 nanoparticles via a facile additive-free hydrothermal route

作者：Yang Shuang; Xu Yanyan; Sun Yaqiu; Zhang Guoying; Gao Dongzhao

来源：CrystEngComm, 2012, 14(23): 7915-7921.

DOI：10.1039/c2ce25929j

A facile and effective hydrothermal process for the controllable synthesis of uniform hematite nanoparticles is presented. The structure and morphology of the products were characterized by powder X-ray diffraction, transmission electron microscopy and scanning electron microscopy. The results showed that the products were uniform alpha-Fe2O3 truncated nanooctahedra bound by 8 highly symmetric quasi-trigonal facets corresponding to a probable Miller index of {102} and the particle size was around 800 nm. The formation mechanism of the products, the effects of the reaction temperature, concentration of reactant, the solvent and the Fe(III) counter ion on the size and morphology of the products were investigated. Through adjusting the concentration of the FeCl3 solution, the size of the particles can be systematically tailored over a wide range from ca. 170 nm to ca. 2 mu m. The magnetic properties and visible light photocatalytic properties of the as-obtained alpha-Fe2O3 products were investigated. The results showed that these alpha-Fe2O3 nanoparticles displayed ferromagnetic or weak ferromagnetic behavior at room temperature and exhibited a good photocatalytic property for rhodamine B.

• 出版日期2012
• 单位天津师范大学