School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039, PR China.
Chemistry. 2011 Apr 18;17(17):4802-8. doi: 10.1002/chem.201001846. Epub 2011 Mar 8.
Three-dimensional (3D) flowerlike hierarchical Fe(3)O(4)@Bi(2)O(3) core-shell architectures were synthesized by a simple and direct solvothermal route without any linker shell. The results indicated that the size of the 3D flowerlike hierarchical microspheres was about 420 nm and the shell was composed of several nanosheets with a thickness of 4-10 nm and a width of 100-140 nm. The saturation magnetization of the superparamagnetic composite microspheres was about 41 emu g(-1) at room temperature. Moreover, the Fe(3)O(4)@Bi(2)O(3) composite microspheres showed much higher (7-10 times) photocatalytic activity than commercial Bi(2)O(3) particles under visible-light irradiation. The possible formation mechanism was proposed for Ostwald ripening and the self-assembled process. This novel composite material may have potential applications in water treatment, degradation of dye pollutants, and environmental cleaning, for example.
三维（3D）花状分级 Fe(3)O(4)@Bi(2)O(3)核壳结构通过一种简单而直接的溶剂热路线合成，无需任何连接体壳。结果表明，3D 花状分级微球的尺寸约为 420nm，壳由几个厚度为 4-10nm、宽度为 100-140nm 的纳米片组成。室温下超顺磁复合微球的饱和磁化强度约为 41emu·g(-1)。此外，与商业 Bi(2)O(3)颗粒相比，Fe(3)O(4)@Bi(2)O(3)复合微球在可见光照射下表现出更高的（7-10 倍）光催化活性。提出了奥斯特瓦尔德熟化和自组装过程的可能形成机制。这种新型复合材料可能在水处理、染料污染物降解和环境清洁等方面具有潜在的应用。
