一维碳纤维承载AgX/TiO2(X=Br,I)三元复合材料的制备及光催化性能

利用静电纺丝技术结合高温煅烧过程制备碳纤维(CNFs)载体材料, 进一步通过溶剂热和化学反应过程获得AgX/TiO₂ /CNFs(X=Br, I)复合光催化剂. 利用X射线衍射(XRD)、 扫描电子显微镜(SEM)、 红外光谱(FTIR)等测试手段表征了材料的结构及形貌. 通过在可见光下降解甲基橙考察了催化材料的光催化性能. 结果表明, 该复合材料具有高吸附性、 良好的传导性以及较好的光敏性, 从而使其具有较好的可见光催化活性; 同时以一维碳纤维作为载体, 使其更容易分离、 回收, 更具有实际应用价值.

Preparation of One-dimensional CNFs Supported AgX/TiO2(X=Br,I) Ternary Composite and Their Visible Light Photocatalytic Activity

The aim of this study was to prepare a novel visible-light-driven photocatalysts AgX/TiO2/CNFs(X=Br, I) composites.Carbon nanofibers(CNFs) which acted as a supporter were prepared via electrospinning technology and high-temperature calcination process.AgX-TiO2/CNFs(X=Br, I) composites were prepared by combining solvothermal with chemical reaction process.The as-prepared composites were characterized by means of X-ray diffraction(XRD), scanning electron microscopy(SEM) and fourier transform infrared spectroscopy(FTIR).The photocatalytic activity of AgX-TiO2/CNFs(X=Br, I) were researched for decomposition of methyl orange(MO) under visible light irradiation.The excellent performance were attributed to the synergistic effects between the high adsorption capacity, good conductivity of carbon nanofibers, and the extraordinary plasma effect of AgX(X=Br, I) nanoparticles.In addition, the as-prepared composites could be easily separated from the solution phase due to the large length-diameter ratio of CNFs.