水相一步合成锐钛矿型二氧化钛空心球  

One-step Synthesis of Anatase-Crystalline Titania Hollow Spheres in Aqueous Solution

作　　者：吴良专[1] 只金芳[1] 

机构地区：[1]中国科学院理化技术研究所

出　　处：《物理化学学报》2007年第8期1173-1177,共5页Acta Physico-Chimica Sinica

摘　　要：报道了水相一步直接合成晶体TiO2空心球的方法.以水溶性的过氧化钛配合物(peroxo-titanium com-plex,PTC)为前驱体、聚苯乙烯(polystyrene,PS)球为模板,在水溶液体系中可直接制备得到锐钛矿型纳米TiO2空心球.与传统的模板法相比,模板的包覆、去除及TiO2壳层的晶化等步骤在水相中可一步完成.利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)及热重分析仪(TGA)对所合成的纳米TiO2空心球进行了表征,同时推断了可能的反应机理.A one-step procedure to fabricate anatase crystalline titania hollow spheres was reported. Anatasecrystalline titania hollow spheres were directly fabricated in aqueous solution with peroxo-titanium complex （PTC） as precursor and polystyrene （PS） spheres as template. Compared with the traditionally template method, the surface coating, the template removal and the crystallization of the titania shell were simultaneously finished in a one-step process. Transmission electron microscope （TEM）, scanning electron microscopy （SEM）, X-ray diffraction （XRD） and thermogravimetric analysis （TGA） were used to characterize the as-prepared titania hollow spheres. A possible formation mechanism was also discussed.

关 键 词：空心球 包覆 TIO2 锐钛矿型 

分 类 号：O614.411[理学—无机化学]