印染助剂2016，Vol.33Issue(5)：21-24,4.
纳米CeO2粒子光催化降解亚甲基蓝的研究
Study on methylene blue photodegradation using CeO2 nanoparticle as catalysts
田志茗 1勾金玲 1黄伟1
作者信息
- 1. 齐齐哈尔大学化学与化工学院，黑龙江齐齐哈尔 161006
- 折叠
摘要
Abstract
CeO2 nanoparticles were prepared by a simple precipitation method and calcinated at 600 ℃. CeO2 nanoparticles were characterized by thermogravimetric analysis, Fourier transform infrared spectroscopy (FT- IR), X- ray diffraction (XRD), N2 adsorption- desorption, scanning electron microscopy (SEM). The photodeg⁃radation of methylene blue catalyzed by CeO2 nanoparticles was studied under UV and sunlight irradiation. The optimum reaction conditions of photodegradation were that the initial concentration of methylene blue was 5.0 mg/L, the initial pH=11, the dosage of CeO2 nanoparticles catalyst calcinated at 600℃was 1.0 g/L. The remov⁃al rate of methylene blue was 87.05% within 60 min under UV irradiation of 300 W. The results indicated that the photodegradation of methylene blue catalyzed by CeO2 fol owed a pseudo first order kinetics. The photoca⁃talysis reactions fit the heterogeneous catalytic kinetic equation Langmuir- Hinshelwood kinetic model. In this case the rate constant for the surface reaction k was 0.138 5 mg/(L·min) and the adsorption equilibrium con⁃stant Kdye was 0.399 7 L/mg.关键词
纳米CeO2/亚甲基蓝/光催化/反应动力学Key words
CeO2 nanoparticles/methylene blue/photocatalysis/kinetics分类
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田志茗,勾金玲,黄伟..纳米CeO2粒子光催化降解亚甲基蓝的研究[J].印染助剂,2016,33(5):21-24,4.
