Abstract The TiO2/Fe3O4 composite is a new kind of photocatalytic materials with magnetism. Using FeCl2, FeCl3, and titanyl sulfate as the main raw material, TiO2/Fe3O4 was synthesized by sol-gel process and 450 °C calcination for 2 h under a condition of hydrogen nitrogen mixture gas. The samples were characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The photocatalytic activity, reclaim and cyclic utilization of the TiO2/Fe3O4 composite were studied by using Rhodamine B as simulated wastewater. The results show that TiO2/Fe3O4 composite has good magnetic properties and excellent photocatalytic activity for removal of Rhodamine B from water, and it can come true well reclaim and recycling by using the electromagnet. The recovery efficiency of TiO2/Fe3O4 composite can reach above 90% at the first reclaiming. TiO2/Fe3O4 composite can be reused tree times without a significant photoactivity loss. It shows that TiO2/Fe3O4 composite is a kind of environmental photocatalyst with a wide application prospects.

中文翻译：

---

溶胶-凝胶法制备TiO2/Fe3O4复合物及其光催化去除水中罗丹明B的活性

摘要 TiO2/Fe3O4复合材料是一种新型的具有磁性的光催化材料。以FeCl2、FeCl3和硫酸氧钛为主要原料，在氢氮混合气体条件下，采用溶胶-凝胶法，450℃煅烧2h合成TiO2/Fe3O4。通过粉末X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）对样品进行表征。以罗丹明B为模拟废水，研究了TiO2/Fe3O4复合材料的光催化活性、再生和循环利用。结果表明，TiO2/Fe3O4复合材料具有良好的磁性能和优异的光催化去除水中罗丹明B的活性，利用电磁铁可以很好地实现回收利用。TiO2/Fe3O4复合材料在第一次回收时的回收率可达90%以上。TiO2/Fe3O4 复合材料可以重复使用多次，而不会造成显着的光活性损失。说明TiO2/Fe3O4复合材料是一种具有广泛应用前景的环境光催化剂。