Flame spray pyrolysis synthesized gold-loaded titanium dioxide photocatalyst for degradation of Rhodamine B

• Main Authors: Pongthep Jansanthea, Weerasak Chomkitichai, Jiraporn Ketwaraporn, Pusit Pookmanee, Sukon Phanichphant
• Format: Journal
• Published: 2019
• Subjects: Materials Science
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071465305&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/66689
• Institution: Chiang Mai University

© 2018, Australian Ceramic Society. Gold-loaded titanium dioxide (Au-loaded TiO2) was synthesized by the flame spray pyrolysis method for using as photocatalyst. The synthesized Au-loaded TiO2 photocatalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The photocatalytic degradation of Rhodamine B (RhB) dye solution over synthesized Au-loaded TiO2 was studied. The concentration of RhB was determined by UV–Vis spectrophotometry. For the photocatalytic activity, it was found that Au(1.00 mol%)-loaded TiO2 was a better photocatalyst than others under the same reaction conditions. The optimal conditions for photocatalytic degradation of RhB were found to be 0.6 g/L of photocatalyst concentration under UV light irradiation (UV–C 254 nm). The highest kinetic rate constant of photocatalyst was 0.0057 min−1 at the optimum conditions and the mechanism of the photocatalytic process had also been discussed.