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Development of photocatalytic TiO2 nanofibers by electrospinning and its application to degradation of dye pollutants

Title
Development of photocatalytic TiO2 nanofibers by electrospinning and its application to degradation of dye pollutants
Author(s)
Dho, Seok JuKim, ChamLee, Se GeunLee, Sung JunKim, Hoyoung
Issued Date
2008-06
Citation
Journal of Hazardous Materials, v.154, no.1-3, pp.118 - 127
Type
Article
Author Keywords
DegradationDyeNanofibersPhotocatalyticPollutantsTiO2
Keywords
ChemistryColoring AgentColoring AgentsCOMPOSITECOUPLING PHOTOCATALYSISCrystal StructureDEGRADATIONDyeDYESELECTRIC FIELDElectrospinningFlow RateFuchsineHETEROGENEOUS PHOTOCATALYSISMemBRANE FILTRATION SystemMethodologyNanofiberNanofibersNanomaterialNanoparticleNanostructuresOptimizationOrganic PollutantOrganic PollutantsOrganic PollutionOXIDATIONOXIDEPhotocatalysisPhotocatalyticPhotocatalytic ActivityPhotochemistryPhotodegradationPollutant RemovalPOLLUTANTSRadiation ExposureREACTORRosaniline DyesSewageSUSPENSIONSTemperature EffectTiO2TitaniumTitanium DioxideUltra-Violet RadiationUltraviolet RaysUltraviolet SpectrophotometryVictoria Blue BVISIBLE-LIGHTWaste Disposal, FluidWATER-PURIFICATIONWater ManagementWater PollutantWater Pollutants, ChemicalWater PurificationX Ray DiffractionAnatase Crystalline PhaseArticleCatalysisCatalyst
ISSN
0304-3894
Abstract
We have developed photocatalytic TiO2 nanofibers for the treatment of organic pollutants by using electrospinning method. We found that the optimized electrospinning conditions (electric field and flow rate) were 0.9 kV cm-1 and 50 μL min-1. After annealing at 550 °C for 30 min, we fabricated TiO2 nanofibers (average 236 nm thick) with anatase crystalline phase. To increase photocatalytic activity and effective surface area, we coated photocatalytic TiO2 particles on the TiO2 nanofibers by using sol-gel method. The degradation rate (k′ = 85.4 × 10-4 min-1) of composite TiO2 was significantly higher than that (15.7 × 10-4 min-1) of TiO2 nanofibers and that (14.3 × 10-4 min-1) of TiO2 nanoparticles by the sol-gel method. Therefore, we suggested that the composite TiO2 of nanofibers and nanoparticles be suitable for the degradation of organic pollutants. © 2007 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3566
DOI
10.1016/j.jhazmat.2007.09.118
Publisher
Elsevier Science BV
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Appears in Collections:
Division of Nanotechnology 1. Journal Articles
Division of Biomedical Technology 1. Journal Articles

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