Title :
Preparation of Visible-Light Responsive Photocatalyst (Bi20TiO32) and Its Photocatalytic Activity for Degrading Organic Pollutants
Author :
Sun, Xuhui ; Sun, Lin ; Zhang, Hongbo ; Ma, Jun
Author_Institution :
Nat. Eng. Res. Center of Urban Water Resources, Harbin Inst. of Technol., Harbin, China
Abstract :
A novel photocatalyst (Bi20TiO32) was synthesized by chemical solution decomposition (CSD) and it was calcined at the temperature of 300°C. It exists in nanosheets with a diameter around 90 nm. The as-prepared Bi20TiO32 is visible-light responsive (up to 500nm in wavelength) without sacrificing its ability for absorbing UV light. The specific activity of Bi20TiO32 is higher than anatase TiO2 under the same sunlight irradiation condition. It has strong adsorption ability that it can oxidize organics directly by its holes, and it can also degrade organics by ·OH. The photocatalytic mechanism of Bi20TiO32 is the combined effect of both holes and ·OH radicals.
Keywords :
adsorption; bismuth compounds; calcination; catalysis; free radical reactions; nanofabrication; nanostructured materials; organic compounds; oxidation; photochemistry; photodissociation; radiation effects; sunlight; ultraviolet spectra; visible spectra; Bi20TiO32; OH radicals; UV light absorption; adsorption; calcination; chemical solution decomposition; nanosheets; organic pollutants degradation; oxidation; photocatalytic activity; specific activity; sunlight irradiation condition; temperature 300 degC; visible-light responsive photocatalyst; Bismuth; Chemical engineering; Chemical technology; Cities and towns; Pollution; Sun; Temperature; Thermal degradation; Titanium compounds; Water resources; Bi20TiO32; TiO2; catalytic oxidation; photocatalytic activity; visible-light responsive;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.67
