中文摘要：

制备了一种由聚N,N-二乙基胺基甲基丙烯酸乙酯（PDEAEMA）介导、贵金属M（Pd,Pt,Au）纳米颗粒复合的二氧化钛（TiO2）纳米微球.将合成的多巴胺基引发剂通过羟基键合在纳米TiO2微球的表面,利用表面引发原子转移自由基聚合技术（SI-ATRP）将N,N-二乙基胺基甲基丙烯酸乙酯（DEAEMA）接枝在纳米TiO2微球表面形成PDEAEMA聚合物刷.PDEAEMA聚合物刷包覆在TiO2微球表面后进一步与碘代甲烷（CH3I）反应形成季铵化的聚电解质Q-PDEAEMA,Q-PDEAEMA与贵金属离子（如PdCl42-、AuCl4-、PtCl62-）进行离子交换后用硼氢化钠（NaBH4）还原后得TiO2-Q-PDEAEMA/M（0）复合纳米微球.贵金属颗粒粒径为2～10nm,且均匀分布于Q-PDEAEMA聚电解质刷中.红外、透射电镜（TEM）和EDS能谱等对所制备的复合纳米微球进行了表征.

英文摘要：

A new kind of TiO2-based ternary composite nanoparticles containing poly（N,N-diethylamino ethyl methacrylate）（PDEAEMA） and noble metal nanoparticles（Pd,Pt,Au） was prepared.PDEAEMA brushes was grafted from dopamine-based initiator anchored on TiO2 nanoparticles via surface-initiated atom transfer radical polymerization（SI-ATRP） at ambient conditions.The PDEAEMA brushes reacted with CH3I to form quaternized-PDEAEMA（Q-PDEAEMA） for exchange with metal anions（such as PdCl2-4,AuCl-4 or PtCl2-6）.After that,the resultant was reducted by NaBH4 to form the noble metal nanoparticles on the surface.Fianlly,the ternary nanocomposites（TiO2 nanoparticles-Q-PDEAEMA /noble metal） were obtained.The results indicated that the size of the noble metal nanoparticles in nanocomposite is about 2-10 nm,uniformly distributed among polymer brushes.The obtained composite nanomaterials were characterized by FT-IR,TEM and EDS.