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4-氯酚在TiO₂纳米膜上光催化降解及反应动力学特征

Kinetic law of photocatalytic degradation of 4-chlorophenol on TiO₂ film

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【Author】 LI Jingyin1,GUO Yufeng2,ZHANG Yatong1,DUAN Huimin1,LI Shufang1(1.College of Science,Hebei University of Science and Technology,Shijiazhuang 050018,China;2.College of Environment,Hebei University of Science and Technology,Shijiazhuang,050018,China)

【机构】河北科技大学理学院；河北科技大学环境学院；河北科技大学理学院河北石家庄　050018；河北石家庄　050018；河北石家庄　050018；河北石家庄　050018；

【Abstract】 TiO2/glass film was prepared by a solgel method with titanium tetrabutoxide as precursor,and used in photocatalytic degradation of 4Chlorophenol(4CP)in aqueous solution.The crystal type and size of TiO2 in film prepared in different experimental conditions were characterized by using XRD.The experiments indicated that the TiO2 particles in different film appear regular anatase structure with size about 833nm after heating treatment at 500℃ temperature,and the film coated 5 layers of TiO2 sol in the case of higher(pH≥10)and lower pH value(pH≤2) showed a higher catalytic activity.The relationship between initial 4CP concentration(C0) and reaction rate(r0) follow LangmuirHinshelwood equation,and the photocatalytic degradation of 4CP(C0≤07mmol·L-1)can be expressed by first order kinetics.更多还原