【摘要】 采用水热法制备了Fe3+改性的SnO2纳米颗粒,通过XRD、BET、TEM、FT-IR和紫外-可见漫反射光谱(DRS)对其结构和光学性质进行研究.结果表明,水热过程实现了氧化锡的直接晶化,产物为金红石结构,Fe3+进入SnO2的晶格之中形成固溶体.这种方法制备的Fe3+改性的SnO2纳米颗粒为单分散状态,粒径分布均匀,纯的SnO2未焙烧前平均粒径为6.0nm,随着Fe3+添加量的增大,样品的粒径减小.BET显示纯的SnO2样品比表面积为206.1m2·g-1,随着Fe3+添加量增大,产物的比表面积增大,同时样品的紫外-可见吸收发生红移.更多还原

【Abstract】 Fe3+-modified SnO2 nanoparticles were directly prepared by hydrothermal method, and were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier transform infrared (FT-IR) spectroscopy, and UV-Vis diffuse reflectance spectra (DRS). It was found that rutile phase was directly synthesized without calcination.The Fe3+-modified SnO2 nanoparticles were well dispersed with narrow size distribution. The crystalline size of SnO2 decreased from 6.0 to 3.8 nm when the Fe3+ content increased from 0 to 20%. The specific surface area of pure SnO2 was 206.1 m2·g-1, and it increased to 259.8 m2·g-1 when Fe content was 15%. A considerable red shift in the absorbing band edge was observed as increase of Fe3+ content. XRD and DRS proved that Fe3+ and SnO2 formed solid solution nanoparticles.更多还原