A facile synthesis of nanocrystalline anatase TiO2 from TiOSO4 aqueous solution

• Main Authors: Ngamta S., Boonprakob N., Wetchakun N., Ounnunkad K., Phanichphant S., Inceesungvorn B.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-84877942725&partnerID=40&md5=97c96261cda5957a1d1d94df01c52bc7; http://cmuir.cmu.ac.th/handle/6653943832/7068
• Institution: Chiang Mai University

A green and simple synthetic route via a thermal hydrolysis of titanyl sulphate (TiOSO4) has been employed to prepare nanocrystalline anatase titanium dioxide (TiO2) without further calcination. X-ray diffraction (XRD) clearly showed that the anatase crystalline structure was already formed under the reaction conditions at 80.0±2.0 C. The obtained anatase TiO2 showed high thermal stability as the anatase-to-rutile transformation in only 25 wt% occurred at 900 C. Scanning electron (SEM) and transmission electron (TEM) micrographs revealed that TiO2 secondary particles comprised irregular primary particles with diameters of 8-22 nm depending on the calcination temperature. Superior UV-light absorption intensity compared with the commercial P25 TiO2suggested the great potential of the obtained material for use as a highly efficient photocatalyst under UV irradiation. © 2013 Elsevier B.V.