CAJ | 학술논문

利用沸水处理有机钛前驱体球较为便捷地制备出结晶二氧化钛多孔球,采用XRD、SEM和TEM对二氧化钛球进行表征,并探讨了二氧化钛球锐钛矿纳米晶形成以及形貌变化的机理.结果表明:延长沸水处理时间有利于多孔结构的形成和纳米粒子的晶化,随处理时间的增加,前驱体球表面变得越来越粗糙,二氧化钛结晶度也逐渐增强.其形成机理主要归因于沸水处理过程中有机钛前驱体球原位发生的完全水解和聚合.
이용비수처리유궤태전구체구교위편첩지제비출결정이양화태다공구,채용XRD、SEM화TEM대이양화태구진행표정,병탐토료이양화태구예태광납미정형성이급형모변화적궤리.결과표명:연장비수처리시간유리우다공결구적형성화납미입자적정화,수처리시간적증가,전구체구표면변득월래월조조,이양화태결정도야축점증강.기형성궤리주요귀인우비수처리과정중유궤태전구체구원위발생적완전수해화취합.
Porous crystalline spherical titania was facilely prepared by treating the organic titanium precursor spheres with boiling water. The spherical titania was characterized by X-ray diffraction, scanning electron mi-croscopy and transmission electron microscopy. The probable mechanism for formation of anatase nanocrystal and the morphology change of precursor spheres was also discussed. The results demonstrate that extending the treating time in boiling water is helpful for the formation of porous structure as well as the crystallization of nanoparticles. With increasing in treating time, the surface of the procursor spheres become rougher and rougher, and the crys-tallinity of anatase titania improves gradually. The forming mechanism of porous structure and anatase nanoerystal is attributed to the complete in-situ hydrolysis and condensation of the organic titanium precursor spheres in boiling water.