Xia Jin-hon
2014
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Journal
Chemical Research and Application
Abstract
In this paper,A type of visible light photocatalyst Bi2WO6was synthesized from Bi( NO3)3·5H2O and Na2WO4·2H2O by means of hydrothermal method. The morphology and Crystal Structure of regular wool ball-like Bi2WO6photocatalyst were characterized by XRD and SEM. The characterization results show that: in the synthetic conditions of 180℃ /6h,the Bi2WO6photocatalyst get a good crystallinity,showing a characteristic peak of Bi2WO6and mean grain size is 0. 283 nm. Light green SF yellowish is being used as the target dyestuff to investigate the photocatalysis properties,the dynamics law of adsorption and degradation of wool balllike Bi2WO6photocatalyst. At the same time,the effect of dosage of photocatalyst,difference light source,the initial concentration of dyestuff solution and reaction time to the adsorption and degradation of light green SF yellowish are also being investigated. The experiment results show that at condition of 298K,pH = 7,the dosage of the regular wool ball-like Bi2WO6photocatalyst is 2g / L,agitating 2 hour under the xenon lamp light( 300W) the degradation rate of Rhodamine B is 90. 2%. The dynamic behavior of the regular wool ball-like Bi2WO6photocatalyst degrading the light green SF yellowish agrees with the first-order rate dynamic equation.