【摘要】 用糠醇单体在TiO2纳米粒子表面的原位酸催化聚合,经适当的热活化处理,制备了共轭高分子PF/TiO2纳米复合催化材料,用TEM、FTIR、UV-V is等技术对其尺寸、结构和光吸收特性进行了表征。在自然光、室温条件下,以亚甲基蓝(MB)的脱色、降解为模型反应,对其光催化性能进行了研究。结果表明,由该方法合成的PF/TiO2复合材料尺寸在80~140 nm,其中PF为具有极性基团(OH,C O)和不同长度共轭链的高分子,且与TiO2以C O Ti相键合;由于PF的复合使该复合材料的吸收波长拓宽至整个紫外-可见光区。光催化实验结果表明,在自然光、室温条件下,该复合材料在5~10 m in可使MB的脱色率、COD去除率分别达到97%、75.2%以上。更多还原

【Abstract】 A conjugated polymer PF/TiO₂ complex nanomaterials was prepared via in-situ acid-catalyzed polymerization of furancarbinol（F） monomer on the surface of TiO₂ nanoparticles,followed by calcination at proper temperature,and characterized by TEM,FTIR and UV-Vis techniques in regard to its size,structure and UV-Vis absorption property.Also,its catalytic activity for the degradation of dye methylene blue（MB） was studied under natural light at room temperature.The results showed that the size of PF/TiO₂ complex particles was in the range of 80～140 nm,PF with different lengths of conjugated chains was chemically linked to TiO₂ by CO（Ti） bond.Doping of PF greatly extended the photoresponse of TiO₂ to the whole UV-Vis region.The catalytic activity of TiO₂ was dramatically enhanced by the modification with PF,and MB could be fully decolorized and largely mineralized within 5 min,the decolorization and mineralization efficiencies of MB,respectively,reached over 97% and 75.2%.更多还原