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Citation: LIU Yan-Ping, YANG Zhi-Yuan. Kinetic Mechanism of Photo-catalytic Oxidation for Soluble Methylene Blue in Water by SO₄^2- Modified Nano-sized TiO₂[J]. Chinese Journal of Applied Chemistry, ;2006, 23(9): 1019-1022. shu

Kinetic Mechanism of Photo-catalytic Oxidation for Soluble Methylene Blue in Water by SO₄^2- Modified Nano-sized TiO₂

LIU Yan-Ping ^, ,
YANG Zhi-Yuan

1.
Department of Material Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054

Corresponding author: LIU Yan-Ping,
Received Date: 9 September 2005
Available Online: 4 December 2005
Fund Project: 陕西省自然科学基金(2003E225)资助项目 (2003E225)

Nano-sized S₄^2-/TiO₂ particles were prepared from TiCl₄ and (NH₄)₂SO₄ by the Sol-Gel method and characterized by XRD and FTIR.Photocatalytic degradation of methylene blue solution under ultraviolet radiation was carried out by using nanoparticle TiO₂ doped with S₄^2- as the photocatalyst.It was found that doping of S₄^2- into TiO₂ by the Sol-Gel method remarkably improved its structure.The reaction of photo-catalysis for methylene blue is in conformity with the first order kinetic law in appearance within the concentration range between 6 mg/L and 15 mg/L.The appearance rate constant of the reaction decreases and the half-life period of the reaction increases with increasing of initial concentration of methylene blue in water, respectively.
- nano-sized TiO₂,
- photo-catalytic oxidation,
- kinetics,
- apparent first-order reaction
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Kinetic Mechanism of Photo-catalytic Oxidation for Soluble Methylene Blue in Water by SO42- Modified Nano-sized TiO2

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通讯作者: 陈斌, bchen63@163.com

Kinetic Mechanism of Photo-catalytic Oxidation for Soluble Methylene Blue in Water by SO₄^2- Modified Nano-sized TiO₂