两种不同类型的纳米材料,TiO2和还原氧化石墨烯(Reduced graphene oxide,RGO)复合制备出性能优异的复合纳米光催化材料(RGO-TiO2).具备商业化前景的湿化学法制备的交互式光催化剂不仅可以对环境刺激做出反应,而且能够自我调节其结构和生物化学性质.采用溶胶-凝胶结合原位模板法制备了纳米复合粒子RGO-TiO2,其粒径约为10.5 nm,引入水溶性聚合物聚乙烯吡咯烷酮(PVP)对RGO-TiO2多孔纳米材料进行改性,以控制其内部通道和孔隙率,介孔孔径从3.41 nm增大到4.81 nm,大幅提高了对四环素(TCH,C22H24N2O8)的光催化降解效率.高降解效率主要源于催化剂表面H2 O和·OH吸附和扩散速率的提高以及异质结对光催化剂固有性能的改善.当其用于降解四环素医药废物时,其反应活性提高了30％.利用电子显微镜研究推断出了可能的“电子拓扑”,Ti中从p轨道移动到d轨道时采用的是电子态的形状传播.电子局域化抑制了激发态电子和空穴的复合,延长带电载流子(电子、空穴和激子)寿命,从而提高了对TCH的降解效率.“,”Combination of two different types of nanomaterials, titania ( TiO2 ) and reduced graphene ox-ide ( RGO) yielded a unique photo-catalytical nanocomposite ( RGO-TiO2 ) . A wet-chemistry with com-mercial potential derived interactive photocatalysts could respond to the environmental stimuli and self-regulate their structures and biochemical properties. The RGO-TiO2 porous nanomaterials were modified using a mesoporous water-soluble polymer, polyvinylpyrrolidone ( PVP) to control the internal channel and porosity. The pore size of these catalysts was increased from 3. 41 to 4. 81 nm, which maximized the photo-catalytical efficacy of tetracycline ( TCH, C22 H24 N2 O8 ) . This in-situ templating was carried out u-sing a feasible sol-gel synthesis to produce different mesoporous RGO-TiO2 nanocomposites sized at 10. 5 nm. High degradation rate for TCH was achieved due to rapid H2 O and ·OH species adsorption and dif-fusion. It was also found that immobilization of electrons at the heterojunction improved intrinsic property of photocatalysts. Its reactivity was found to be improved by >30％ when applied for degradation of the above pharmaceutical wastes. The electron microscopic study inferred“electron topology”allowed for the shape propagation of electron states adopted as they moved from p to d orbitals in Ti. The individual lo-calization of the electrons successfully prevented the recombination of excited electrons and holes. The life spans of these charge carries ( electrons, holes, and excitons) were extended to secure the high effi-cacy of the TCH degradation under moderate conditions.