微波辅助制备锐钛矿二氧化钛多孔球(英文)

Microwave-assisted Preparation of Porous Anatase Titania Sphere

利用微波处理乙二醇钛前驱体球,制备出锐钛矿型二氧化钛多孔球,采用XRD、HRTEM和SEM等手段对二氧化钛球进行表征,并对二氧化钛多孔球的制备机理进行了探讨。结果表明:微波处理有利于二氧化钛多孔结构的形成和纳米粒子的晶化,从而获得由锐钛矿型纳米晶组成的二氧化钛多孔球,其形成机制主要是由于微波处理过程中乙二醇钛前驱体球原位发生了水解、聚合反应。

Porous anatase titania sphere was prepared by treating the titanium glycolate precursor sphere in the water under microwave irradiation.X-ray diffraction(XRD),high-resolution transmission electron microscopy(HRTEM) and scanning electron microscopy(SEM) were adopted to analyze the structure and morphology of samples.The formation mechanism of porous anatase spheres was also discussed.The results show that microwave irradiation is helpful for the formation of porous structure as well as the crystallization of nanoparticles,finally forming the porous anatase titania sphere,which is composed of interconnected nanoparticles and pores.The forming mechanism of porous structure and anatase nanocrystal is attributed to the in-situ complete hydrolysis and condensation of the titanium glycolate precursor sphere under microwave irradiation.