石油化工高等学校学报2011，Vol.24Issue(2)：6-9,4.DOI:10.3696/j.issn.1006-396X.2011.02.002
溶胶-凝胶法制备纳米氧化钛及其相变机理的研究
Preparation of Nano-TiO2 by Sol-Gel Method and Its Phase Transformation
摘要
Abstract
TiO2 nanoparticle was prepared by sol-gel method using Ti(OBu)4 as precursor. Phase transformation of TiO2 from anatase to rutile was studied by UV Raman spectroscopy, visible Raman spectroscopy, X-ray diffraction (XRD). The results from visible Raman spectroscopy are in good agreement with those of XRD patterns. It was observed that anatase in the bulk region starts to change into rutile at 600 ℃. However, from UV Raman spectra, the anatase in the surface region transformed into the rutile phase until the calcination temperature was up to 765 ℃. The inconsistency in the results from the above three techniques suggests that the anatase phase of TiO2 at surface region can remain at relatively higher calcination temperatures than that in bulk during the phase transformation. It was suggested that the rutile phase starts to form at the interfaces between the anatase particles of the agglomerated TiO2 particles.关键词
氧化钛/相变/溶胶凝胶法Key words
TiO2/ Phase transformation/ Sol-gel分类
化学化工引用本文复制引用
张静,阎松..溶胶-凝胶法制备纳米氧化钛及其相变机理的研究[J].石油化工高等学校学报,2011,24(2):6-9,4.基金项目
国家自然科学基金青年基金资助(20903054). （20903054）
