Abstract A novel recoverable visible-light photocatalyst, amorphous Fe2TiO5/C composite, was prepared via nonhydrolytic sol-gel method with carbon-containing precursors as in-situ carbon sources. It is demonstrated that the precursors, iron ethoxide and butyl titanate, react to form Fe-O-Ti bonds in gel through a ether elimination reaction and amorphous Fe2TiO5 at 300 °C, which finally crystallizes at 600 °C. The residual organic groups form uniform-doped C. Interestingly, the photocatalytic activity of amorphous Fe2TiO5/C is distinctly superior to those of its crystalline counterparts without C and P25 (43-fold increase and 12-fold increase, respectively), which is mainly attributed to the incorporation of C (8.17 wt%) and amorphous Fe2TiO5 with a hollow spherical structure and a high BET surface area of 195.5 m2/g. Importantly, the photocatalyst can be recovered with a recovery rate of 100% simply by an external magnetic field, making it have promising applications in the wastewater treatment field.

中文翻译：

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新型可回收无定形 Fe2TiO5/C 空心球的非水解溶胶-凝胶原位合成作为可见光驱动的光催化剂

摘要 以含碳前驱体为原位碳源，采用非水解溶胶-凝胶法制备了一种新型可回收可见光光催化剂，无定形Fe2TiO5/C复合材料。结果表明，前体乙醇铁和钛酸丁酯通过醚消除反应和无定形 Fe2TiO5 在 300°C 下反应形成凝胶中的 Fe-O-Ti 键，最终在 600°C 结晶。残留的有机基团形成均匀掺杂的 C。有趣的是，非晶 Fe2TiO5/C 的光催化活性明显优于没有 C 和 P25 的结晶对应物（分别增加 43 倍和 12 倍），这主要是归因于 C (8.17 wt%) 和具有空心球形结构和 195.5 m2/g 高 BET 表面积的无定形 Fe2TiO5 的结合。重要的，