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采用固相反应法合成了Al掺杂TiO2(Al-TiO2)及N与Al共掺杂TiO2(N-Al-TiO2)纳米材料,采用XRD、SEM、UV-Vis DRS、XPS、Raman以及N2吸附-脱附等手段对材料进行了物相结构表征。同时考察了可见光辐照下催化剂对葛根素降解性能。N-Al-TiO2纳米材料的微观形貌为短棒形;氮以阴离子(N3-)形式取代氧进入TiO2晶格,形成N—Ti键,Al3+以同晶取代方式占据TiO2晶格中Ti的位置;其表面N、Al、Ti及O的原子百分比组成(%)分别为7.8、3.6、32.7和55.9;并对葛根素显示出很高的可见光降解活性,2 h对葛根素的降解率达92.7%。3种材料对葛根素的吸附容量与其对葛根素的可见光降解能力一致,依次为N-Al-TiO2>纯TiO2>Al-TiO。
Al-doped TiO2 and N-Al-TiO2 nanostructured materials were synthesized by solid-state reaction method. XRD, SEM, UV-Vis DRS, XPS, Raman and N2 adsorption - desorption and other means of material phase structure characterization. At the same time, the degradation of puerarin under visible light irradiation was investigated. The morphology of N-Al-TiO2 nanomaterials was short rod shape. Nitrogen substituted anions (N3-) into the TiO2 lattice and formed N-Ti bonds. Al3 + occupied the Ti in the TiO2 lattice by isomorphous substitution The atomic percent composition (%) of N, Al, Ti and O were 7.8, 3.6, 32.7 and 55.9, respectively. The puerarin showed high visible light degradation activity. The degradation rate of puerarin was 92.7%. The adsorption capacities of the three materials on puerarin were the same as that of puerarin on visible light degradation, which were N-Al-TiO2> pure TiO2> Al-TiO.