Ag/Fe_2O_3复合微球的制备及表征

Preparation and Characterization of Ag/Fe_2O_3 Composite Microspheres

以阳离子交换树脂为模板，采用离子交换法，制备了Ag／Fe2O3复合微球。采用扫描电子显微镜、X射线衍射仪、X射线能量散射谱仪、紫外-可见分光光度计对Ag／Fe2O3复合微球进行了表征，结果表明，复合微球直径在400～600μm之间，微球主要为Ag与α-Fe2O3等晶粒所组成。以甲基橙溶液为研究对象，分别在紫外光和可见光照射下，对Ag／Fe2O3复合微球的光催化活性进行了评价。光催化实验结果表明，Ag／Fe2O3复合微球具有较好的光催化性能。

The Ag/Fe2O3 composite microspheres were prepared through an ion exchange process with cation resins as templates. The composite micro- spheres were characterized by scanning electron mi- croscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy and UV-Vis absorption spectra. The results showed that the composite microspheres were mainly composed of Ag and α-Fe2O3 nanocrystals, and the diameter of the microspheres was about 400- 600 μm. Irradiations were performed with UV light and the sunlight, respectively, and photooxida- tion of methly-orange was used to evaluate photocata- lytic activity of the Ag/Fe2O3 composite microspheres. The experimental results indicated that the Ag/Fe2O3 composite microspheres had good photocatalytic activity.