【摘要】 以溶胶-凝胶法制备的氮掺杂二氧化钛（TiO₂）为基质,以罗丹明B（RhB）为模板分子,以邻苯二胺为交联剂和功能单体,在紫外光下引发聚合,制备了RhB表面分子印迹N-TiO₂-MIP。采用傅立叶红外光谱（FT-IR）、X射线衍射（XRD）、紫外-可见光漫反射吸收光谱（UV-Vis）等对样品进行了表征。结果表明:样品为纳米级锐钛矿相;氮（N）掺杂因N2p与O2p混合引起禁带窄化,表面包覆及分子印迹均有效改善了TiO₂孔型和孔隙结构,增大了比表面积,N-TiO₂-MIP对目标污染物RhB的降解率高达93.2%,并具有良好的选择性。更多还原

【Abstract】 Rhodamine B surface molecular imprinted N-TiO₂ was synthesized by surface molecular imprinting technique using nitrogen-doped TiO₂ as the substrate prepared by sol-gel technique,rhodamine B as the template molecule,o-phenylenediamine as cross linking agent and the functional monomer,polymerized under UV irradiation.The samples were characterized by FT-IR,XRD,UV-Vis diffuse reflectance spectrophotometer and N₂ adsorptiondesorption.The results indicated that titania all were anatase with nanometer size.The red-shift of absorption edge was caused by both narrowed energy gap by mixed of N₂ pand O₂ pinduced by nitrogen doped to TiO₂ andπ-π*transition from the domain of conjugate structure with poly（o-phenylenediamine）.The pass and pore structure were improved effectively by nitrogen-doping,surface coating and molecular imprinting,the specific surface area was increased.Compared with four kinds of pollutant degradation,due to specific recognition sites caused by molecular imprinting,it showed that a good selectivity for the target pollutants rhodamine B under visible-light,the degradation was 93.2%.更多还原