Title: Enhancement of photocatalytic degradation of methylene blue in surfactant/ceriurm(III)-titanium dioxide/float pearls aqueous dispersions

Authors: Chunxiang Li, Pengwei Huo, Songtian Li, Yongsheng Yan

Addresses: School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road 301, 212013 Zhenjiang, PR China. ' School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road 301, 212013 Zhenjiang, PR China. ' School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road 301, 212013 Zhenjiang, PR China. ' School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Road 301, 212013 Zhenjiang, PR China

Abstract: Ceriurm(III)-titanium dioxide/float pearls photocatalyst mixed with Sodium Lauryl Sulphate (SLS) were used to degrade methylene blue under visible light illumination. The photocatalyst of Ce3+-TiO2/float pearls was prepared by sol-gel method and characterised by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), Ultraviolet-visible Diffuse Reflection Spectrum (UV-vis DRS) and Energy Dispersive Spectrometer (EDS). The influence of pH value and dosage of SLS on the photocatalytic activity was studied. The result indicated that the presence of SLS cut down the surface tension of dye liquor, leading to obviously increased degradation rate. The photocatalytic degradation rate reached 93.49% under visible light radiation in 240 min, improved by 10.30% in the non-neutral aqueous.

Keywords: ceriurm; titanium dioxide; float pearls; SLS; sodium lauryl sulphate; photocatalytic degradation; methylene blue; surface tension; degradation rate; cationic dyes; wastewater treatment.

DOI: 10.1504/IJMPT.2010.035807

International Journal of Materials and Product Technology, 2010 Vol.39 No.3/4, pp.330- 338

Published online: 05 Oct 2010 *

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