碳纤维负载钐掺杂纳米TiO<sub>2</sub>复合材料的制备与表征

碳纤维负载钐掺杂纳米TiO₂复合材料的制备与表征

摘要: 采用静电纺丝法和热处理工艺制备了纳米碳纤维负载掺杂1.5%（摩尔分数）Sm的纳米TiO₂复合材料（SmTiO₂/CNFs）, 利用SEM、 EDX、 TEM、 FTIR和XRD对其组成和结构进行了表征, 并以甲基橙为降解对象, 考察了SmTiO₂/CNFs复合材料在紫外光照射下对甲基橙的光催化降解效果。结果表明, 掺杂Sm³⁺的TiO₂以锐钛矿晶型均匀分散在碳纳米纤维的表面和内部, 质量分数为20%左右; 相对于未掺杂的TiO₂/CNFs样品, SmTiO₂/CNFs的光催化活性提高约37% 。

Abstract: The composite of Sm-doped TiO₂ nanoparticles loaded onto carbon nanofibers (SmTiO₂/CNFs ) was prepared by electrospinning technique and thermal processes. The samples were characterized by SEM, EDX, TEM, FTIR and XRD.The effect of Sm-doping on the photocatalytic activity of the SmTiO₂/CNFs composite was investigated by the photocatalytic degradation of methyl orange aqueous solution under UV irradiation.The results show that the CNFs are loaded with about 20% mass fraction of Sm---doped anatase TiO₂nanoparticles. In comparison with the undoped sample (TiO₂/CNFs), the photocatalytic activity of the SmTiO₂/CNFs increases by about 37%.