具有介孔结构的纳米锐钛矿型C,Co-MTiO2降解染料的研究

摘要

为了提高催化剂对太阳光的充分吸收和利用,采用模板技术合成了C,Co共掺杂的具有介孔结构的纳米锐钛矿型TiO2(C,Co-MTiO2).采用N2-物理吸附和解吸附、X-射线衍射、高分辨电子显微镜、UV-Vis对材料进行表征.结果表明,该材料热稳定性好,比表面积高,是具有较大介孔孔径的锐钛矿型TiO2.在夏季太阳光照射下光催化降解亚甲基蓝、甲基紫、曙红Y和甲基橙4种有机染料,与商品化的P-25TiO2相比,C,Co-MTiO2有很好的催化活性.该催化剂的高效光催化活性可能与其锐钛矿晶体结构、高比表面积、纳米尺寸、介孔孔道、碳和钴的协同效应有关.%In order to improve absorption and utilization of solar light,carbon,cobalt co-doped mesoporous nano titania with anatase crystalline structure(C,Co-MTiO2) was prepared using templating method.The catalyst was characterized by techniques like N2 physisorption,X-ray diffraction (XRD),HRTEM,UV-Vis.The characterization results indicated that the mesoporous titania with anatase crystalline structure exhibited highly thermal stability,high specific surface area and large pore size.The C,Co-MTiO2 was used for the solar photocatalytic degradation of methylene blue,methyl violet,eosin Y and methyl orange.It was found that the catalyst exhibited an excellent activity of photocatalytic degradation of dyes under solar light irradiation in summer,compared to commercial Degussa P-25 TiO2.The enhanced photocatalytic activity of C,Co-MTiO2 catalyst may be attributed to the synergistic effects of anatase crystalline structure,nano-size,mesoporous channels,high specific surface area,carbon and cobalt.