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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Visible-light-inducedphotocatalyticperformancesofZnO-CuOnanocompositesfordegradationof2,4-dichlorophenol
DOI: 10.1016/S1872-2067(15)60886-5, PP. 1263-1272
Keywords: Nanostructures,Coupledmetaloxide,Photocatalyticdegradation,Visiblelightirradiation,Recombination
Abstract:
？NanostructuredZnOandCuO,andcoupledoxides,i.e.,ZnCu,Zn2Cu,andZnCu2,withZnO:CuOmolarratiosof1:1,2:1,and1:2,respectively,weresuccessfullypreparedthroughasimple,one-step,microwave-assistedurea-nitratecombustionsynthesis,withouttheuseoforganicsolventsorsurfactants.ThepreparedsampleswerecharacterizedusingX-raydiffraction,X-rayphotoelectronspectroscopy,scanningelectronmicroscopy,energy-dispersiveX-rayanalysis,transmissionelectronmicroscopy,Fourier-transforminfraredspectroscopy,diffusereflectancespectroscopy,andphotoluminescencespectroscopy.TheopticalabsorptionofZnOextendedintothevisibleregionafterCuOloading.ThephotocatalyticactivitiesofZnO,CuO,andthecoupledoxideswereevaluatedbasedonphotodegradationof2,4-dichlorophenolundervisible-lightirradiation.ThecoupledmetaloxideZn2Cushowedthebestphotocatalyticactivity;thiswasmainlyattributedtotheextendedphotoresponsiverangeandtheincreasedchargeseparationrateinthenanocomposite.Thephotocatalyticdegradationprocessobeyedpseudo-first-orderkinetics.TheresultssuggestthatthecoupledmetaloxideZn2Cuhaspotentialapplicationsasanefficientcatalyticmaterialwithhighefficiencyandrecyclabilityforthephotocatalyticdegradationoforganicpollutantsinaqueoussolutionundervisible-lightirradiation.
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