Synthesis of Nanosized Anatase Particles from Commercial Rutile Powder by Using Hydrothermal Method
Ubonwan Chutiphunphinyo, Siriporn Larpkiattaworn and Pornapa Sujaridworakun* Author for corresponding; e-mail address: pornapa.s@chula.ac.th
Volume :Vol.35 No.1 (JANUARY 2008)
Research Article
DOI:
Received: 20 September 2007, Revised: -, Accepted: 15 October 2007, Published: -
Citation: Chutiphunphinyo U., Larpkiattaworn S. and Sujaridworakun P., Synthesis of Nanosized Anatase Particles from Commercial Rutile Powder by Using Hydrothermal Method, Chiang Mai Journal of Science, 2008; 35(1): 1-5.
Abstract
Nanosized anatase particles with size ranging from 5.73 nm to 8.26 nm were prepared by low temperature hydrothermal process (150๐C) using commercial rutile powder as a starting material. Various parameters such as pH, hydrothermal temperature and reaction time were studied. It was found that, the degree of crystallinity, crystallite size, and specific surface area of anatase powder can be controlled by varying these parameters. The synthesized powders were characterized by XRD, SEM, BET and UV-VIS spectrophotometer. The results show that pH value affected obviously on the photocatalytic activity of anatase. The anatase obtained under pH7, hydrothermal at 150๐C for 6h has crystallite size about 8.26 nm and specific surface area 164.87 m2/g which its photocatalytic activity closes to that of commercial photocatalyst (ST-01)