Alkali Induced Morphology and Property Improvements of TiO2 by Hydrothermal Treatment

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 23; no. 4; pp. 503 - 506
• Main Authors: He, Qiong, Wen, Xianming, Ma, Peihua, Deng, Xiaochuan
• Format: Journal Article
• Language: English
• Published: Heidelberg Wuhan University of Technology 01.08.2008; Springer Nature B.V; Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China; Graduate School of Chinese Academy of Sciences,Beijing 100039,China%Graduate School of Chinese Academy of Sciences,Beijing 100039,China%Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China
• Subjects: Chemistry and Materials Science; Materials Science; 二氧化硅; 光催化作用; 溶液热力学; 金红石; hydrothermal; photocatalysis; rutile; nanofiber
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-006-4503-2

Alkali induced morphology and property improvements of TiO2 by hydrothermal reaction were investigated. The products were characterized by SEM, TEM, XRD, TG, EDX, FT-IR and DRS. The results indicate that, with the phase transformation from anatase to rutile, the morphologies changed from high aggregated particles to nanofibers with the diameter of about 100 nm and the length up to several tens of micrometers, meanwhile the process is controllable by manipulating the nature of the alkali, alkalinity and hydrothermal temperature. DRS analysis shows the property improvement of the nanofibers in the UV-Vis light absorption compared with the raw materials, implying the products have potential application in photocatalysis.