钆铁硫共掺杂TiO2/CF光催化材料的制备及其可见光活性研究

摘要

Gd/Fe/S doped TiO2 is prepared by sol-gel method. Gd/Fe/S-TiO2 film photocatalysts supported on the surface of modified PAN-carbon fiber (PAN-CF) substrates are prepared via the dip-coating method, then annealed in steam ambient, Gd/Fe/S-TiO2/CF photocatalytic materials are obtained. The structural properties of the Gd/Fe/S-TiO2/CF were characterized by FE-SEM, XRD, The photocatalytic properties of Gd/Fe/S-TiO2/CF are evaluated using the photodegradation of acid orange II under the irradiation of Xenon light. The results show: The material co-doped with Gd, Fe, and S achieves obvious mi-cropre structure, Gd/Fe/S-TiO2/CF can enhance the photoresponse in the visible light region and increase the photocatalytic activity under visible light.%以表面改性的聚丙烯腈基碳纤维(PAN-CF)为基体,采用Sol-Gel法制备钆、铁、硫元素共掺TiO2溶胶,通过浸渍涂覆法将溶胶负载到PAN-CF表面上,退火得到Gd/Fe/S-TiO2/CF光催化材料.采用FE-SEM、XRD等对材料结构进行表征；以氙灯为模拟日光源,以酸性橙Ⅱ为目标降解物,研究了制备得到的光催化材料的可见光催化活性.结果表明:钆、铁、硫元素共掺杂赋予了材料表面更明显的微孔结构；显著扩展了TiO2可见光响应能力,提高了光催化材料的可见光催化活性.