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催化学报  2015 

Synthesisandcharacterizationofsulfur-titaniumdioxidenanocompositesforphotocatalyticoxidationofcyanideusingvisiblelightirradiation

DOI: 10.1016/S1872-2067(14)60320-X, PP. 698-704

Keywords: Titaniumdioxide,Sulfur-doping,Photocatalyst,Cyanideoxidation

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Abstract:

?Asol-gelmethodwasusedtoprepareTiO2andsulfur-TiO2(S-TiO2)nanocomposites,whichwerecharacterizedbyN2adsorption-desorption,X-raydiffraction,X-rayphotoelectronspectroscopy,photoluminescene,ultravioletvisibleandtransmissionelectronmicroscopymeasurements.ThephotocatalyticperformanceofTiO2andS-TiO2nanocomposites,withrespecttothephotocatalyticoxidationofcyanideundervisiblelightirradiation,wasdetermined.TheresultsrevealthatSiswelldispersedonthesurfaceofTiO2nanoparticles.Additionally,thesurfaceareaoftheS-TiO2nanocompositeswasobservedtobesmallerthanthatoftheTiO2nanoparticlesbecauseofblockedporescausedbydopingwithS.TheS-TiO2nanocomposite(0.3wt%S)exhibitedthelowestbandgapandthehighestphotocatalyticactivityintheoxidationofcyanide.ThephotocatalyticperformanceofS-TiO2(0.3wt%S)nanocompositeswasstable,evenafterthefifthreuseofthenanoparticlesfortheoxidationofcyanide.

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