中文摘要：

以TiO2为基体, 在聚苯乙烯（PS）胶球和EO20PO70EO20（P123）两种模板剂作用下通过溶胶-凝胶及煅烧后处理方法制备了三维有序大孔纳米复合材料Bi2O3/TiO2. 经傅里叶变换红外（FT-IR）光谱、X-射线衍射（XRD）、等离子体原子发射光谱（ICP-AES）、紫外-可见漫反射吸收光谱（UV-Vis DRS）、X-射线光电子能谱（XPS）、扫描电子显微镜（SEM）和N2吸附-脱附等物理测试手段对其组成、结构、形貌及表面物理化学性能进行了表征. 结果表明, 该复合材料晶型结构良好, 孔结构排列整齐有序, 孔壁呈介孔结构, 属于三维有序大孔材料（3DOM）. 与TiO2相比, 3DOM-Bi2O3/TiO2对光的吸收至少红移60 nm, 且红移至可见区. 在紫外光、可见光以及微波辅助等多模式光催化降解结晶紫的实验中, 复合材料3DOM-Bi2O3/TiO2表现出良好的光催化活性, 其活性明显高于P25、Bi2O3和Bi2O3/TiO2. 同时, 该复合材料针对不同类型的染料均表现出较好的紫外光降解效果, 且3 次循环实验后, 依旧保持较高活性.

英文摘要：

Polystyrene latex （PS） spheres and EO20POT0020 （P123） were used as dual template agents, with TiO2 as the matrix, to prepare a three-dimensionally ordered macroporous （3DOM） composite Bi2OETiO2, using a sol-gel method and post-processing calcination. The phase structures, chemical composition, morphology, and surface physicochemical properties were characterized using X-ray diffraction （XRD）, Fourier-transform infrared （FT-IR）, ultraviolet-visible diffuse reflectance （UV-Vis DRS） and X-ray photoelectron spectroscopies （XPS）, inductively coupled plasma atomic emission spectroscopy （ICP-AES）, scanning electron microscopy （SEM）, and N2 adsorption-desorption measurements. The results show that the composite is well crystallized and has a highly ordered porous structure with mesoporous walls; it is a 3DOM material. The light absorption of 3DOM-Bi2OJ-1302 is red-shifted by about 60 nm to the visible region compared with TiO2. tn the photocatalytic degradation of crystal violet using various methods, namely ultraviolet, visible-light, and microwave-assisted irradiation, the activity of 3DOM-Bi2O3/TiO2 is significantly higher than those of P25, Bi2O3, and Bi2OETiO2. The 3DOM-Bi2OJTiO2 composite also shows good photocatalytic activity in the degradations of various dyes under ultraviolet irradiation. The 3DOM-Bi2OJTiO2 activity is well retained after three cycles.