Titanium dioxide powder prepared by a sol-gel method

• Main Authors: Pookmanee P., Phanichphant S.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-67649840234&partnerID=40&md5=31a964e3bb7396125ed98fc11632bdfb; http://cmuir.cmu.ac.th/handle/6653943832/5852
• Institution: Chiang Mai University

Titanium dioxide (TiO2) powder was prepared by a sol-gel method. Titanium isopropoxide (Ti(OCH(CH3)2)4) and citric acid ((C3H5O(COO)3)H3-H 2O) were used as the starting precursors with a mole ratio of 1: 3. Ammonium hydroxide (NH4OH) was added to adjust the pH of the mixed final solutions. Co-precipitation powder was obtained with the final solutions at pH = 2, 4 and 6. The powder was dried at 80 °C for 24 h and calcined at 400 and 800 °C for 2 h with a heating rate of 5 Kminute"1. The phase transformation was investigated by an X-ray diffractometer (XRD). The anatase structure of titanium dioxide was obtained after calcination at 400 and 800 °C for 2 h. The microstructure was characterized by a scanning electron microscope (SEM). The range of particle size was 0.1-0.5 um with an irregular particle shape.