Preparation and Characterization of TiO2/Expanded Graphite

• Published in: Transactions of Tianjin University Vol. 16; no. 2; pp. 156 - 159
• Main Author: 赖奇 朱世富 刘国钦 邹敏 李玉峰 罗学萍
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 01.04.2010; College of Material Science and Engineering, Sichuan University, Chengdu 610065, China; Panzhihua University, Panzhihua 617000, China%College of Material Science and Engineering, Sichuan University, Chengdu 610065, China%Panzhihua University, Panzhihua 617000, China
• Subjects: Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Science; 二氧化钛凝胶; 差示扫描量热法; 扫描电子显微镜; 石墨表面; 膨胀容积; 质量损失率; titanium dioxide; expanded graphite; composite; preparation
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-010-0029-y

In order to obtain anatase TiO2/expanded graphite with high expansion volume, titania gel was introduced to expandable graphite surface by sol-gel process, and then the composite was expanded and calcined at high tempera- ture. The samples were analysed by using scanning electron microscope （SEM）, X-ray diffraction（XRD）, energy disperse spectroscopy （EDS）, and differential scanning calorimetry （DSC）. The optimal conditions for preparation are as follows： the molar ratio of tetrabutyl orthotitanate to triethanolamine is 1 ： 0.4, and the calcination and expansion temperature is in the range of 650--750 ~C. Under such conditions, the expansion volume of composites could reach 98 mE/g, and the mass loss ratio is less than 5%. The analysis shows that lower temperature and smaller particle size of graphite are helpful to the formation of anatase-type of TiO2, but larger particle size will lead to lower mass loss ratio, and higher temperature and larger particle size will lead to higher expansion volume.