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柏林亥姆霍茨大研究中心的化学家最近开发出一条新的合成路径:在室温环境中利用“聚合物纳米反应器”成功制备了纳米二氧化钛(TiO2)晶体颗粒(目前传统TiO2颗粒要在高温环境中才能形成晶体结构)。这种聚合物纳米反应器的核心是聚苯乙烯,外围由PNIPAM链构成的网状结构包裹;化学家将这种聚合物结构放入以乙醇为溶剂的溶液中,并加入钛化合物后就形成了TiO2颗粒,这些颗粒均匀、有序地附着在PNIPAM网内,可有效避免过大的纳米颗粒生成;通过调控反应速率,从而可有效控制纳米晶体的大小和质量,这也保证了纳米TiO2晶体的结构及其催化功能。
Chemists at the Helmholtz Research Center in Berlin have recently developed a new synthesis route: Nanocrystalline titania (TiO2) particles have been successfully prepared using “polymer nanoreactors” at room temperature In high temperature environment to form a crystal structure). The core of this polymer nanoreactor is polystyrene, surrounded by a network of PNIPAM chains. Chemists place this polymer structure in a solution of ethanol and form a titanium compound TiO2 particles, these particles uniformly and orderly attached to the PNIPAM network, which can effectively prevent the formation of excessive nanoparticles; by regulating the reaction rate, which can effectively control the size and quality of nanocrystals, which also ensures the nano-TiO2 crystal Structure and its catalytic function.