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采用浸渍法制备直径约20nm,长度达到微米级,且形态分布均匀的Ag2O-TiO2纳米纤维。以TEM、XRD、DRS及XPS手段对样品晶型结构、微观形貌以及化学组成进行表征,探讨掺杂对TiO2纤维结构和性质的影响。结果表明:未掺杂纤维表面平滑,浸渍法制备的Ag2O-TiO2纤维表面有明显的球状颗粒存在,颗粒直径为2～5nm,分布均匀,且其XRD谱出现Ag2O的衍射峰。与未掺杂样品相比,掺杂纤维的DRS谱线发生蓝移,光催化降解亚甲基蓝实验表明Ag2O-TiO2纤维光催化活性较高。
Ag2O-TiO2 nanofibers with a diameter of about 20 nm, a length of micrometer and a uniform distribution were prepared by impregnation. The crystal structure, microstructure and chemical composition of the samples were characterized by TEM, XRD, DRS and XPS. The effects of doping on the structure and properties of TiO2 fibers were investigated. The results show that the surface of Ag2O-TiO2 fibers prepared by impregnation has obvious spherical particles. The diameter of the particles is 2 ~ 5 nm, the distribution is uniform, and the diffraction peak of Ag2O appears in the XRD spectrum. Compared with the undoped samples, the DRS spectra of doped fibers were blue-shifted. The photocatalytic degradation of methylene blue showed that the photocatalytic activity of Ag2O-TiO2 fibers was high.