Study the crystalline phase, morphology and growth properties of TiO2 by wet-chemical method

• Main Authors: Huai-Ren Guo, 郭懷仁
• Other Authors: Wen-Ku chang
• Format: Others
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/fmt4kb

碩士 === 國立東華大學 === 材料科學與工程學系 === 100 === In this study,Preparation of the variety of TiO2 crystalline phase and morphology of the growth by the chemical solution method、hydrothermal method and solvothermal method. Analysis of the crystalline phase composition of TiO2 by X-ray diffractometer,and observe the surface morphology by scanning electron microscopy. The experimental results showed that as a precursor to TiCl3 heated to 90 ℃ by chemical solution,and control the reaction solution at pH = 1.16, through six hours the growth of the main product for Brookite phase of TiO2 particles, when the reaction time increased to twelve hours, the product of the mixed phase of the irregular arrangement of the Brookite / Rutile TiO2 nanorod structure.By the Hydrothermal Method,the mixed phase of the Brookite / Rutile= 88.31:11.69 can be obtained,when the reaction temperature increased to 180 ℃ and reaction time increased to twelve hours. When precursors is tetrabutyl titanate (TBOT), regulation of hydrochloric acid content can control the growth morphology and growth in the solution 3 to 7μm of TiO2-micron stab the ball, and self-assembly Rutile crystalline phase microrods shaped array, of a thickness of about 5.83μm. The experimental results that the TiO2 surface morphology with different preparation methods and precursors, we can control the growth Brookite / Rutile mixed-phase nanoparticles, nanorods, and Rutile micron stab the ball and sub-micron rods-shaped array.