[emuch.net][1476217]Angew2011.SI

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1、SupportingInformationWiley-VCH201169451Weinheim,GermanyAnisotropicGrowthofTitaniaontoVariousGoldNanostructures:Synthesis,TheoreticalUnderstanding,andOptimizationforCatalysisZhiWeiSeh,ShuhuaLiu,Shuang-YuanZhang,M.S.Bharathi,H.Ramanarayan,MichelleLow,

2、KwokWeiShah,Yong-WeiZhang,*andMing-YongHan*anie_201104943_sm_miscellaneous_information.pdfExperimentalSectionMaterials..HAuCl43H2O(99.9+%),sodiumcitratedihydrate(99+%),L-ascorbicacid(≥99%),hydroxypropylcellulose(Mw=~370,000),titaniumdiisopropoxidebis

3、(acetylacetonate)(75wt%inisopropanol)and4-nitrophenol(≥99%)werepurchasedfromAldrich.Cetyltrimethylammoniumbromide(CTAB,≥96.0%)andsodiumhydroxide(≥98%)werepurchasedfromFlukaandMerck,respectively.Silvernitrate(99.8+%)andsodiumborohydride(99%)werepurcha

4、sedfromAcrosOrganics.Isopropanol(VLSIPuranal250)andammonia(25wt%)werepurchasedfromHoneywell.Allchemicalswereusedasreceivedanddeionizedwater(Millipore,Milli-Qgrade)wasusedinallexperiments.Characterization.Transmissionelectronmicroscopy(TEM)imageswerer

5、ecordedusingaJEOL1010TEM(acceleratingvoltage100kV)andaPhilipsCM300FEGTEM(acceleratingvoltage300kV).Fouriertransforminfrared(FTIR)spectrawereobtainedwithaPerkinElmerSpectrum2000FTIRSpectrometerusingKBrpellets.UV-VisspectraweretakenusingaShimadzuUV-315

6、0spectrophotometer.SynthesisofVariousGoldCoresforTiO2Coating.Sphericalgoldnanoparticles,shortgoldnanorodsandlonggoldnanorodsweresynthesizedaccording[1]toproceduresdescribedintheliterature.Thesolutionofsphericalgoldnanoparticles(250mL)wasstirredoverni

7、ghtwithhydroxypropylcellulosesolution(10mL,0.5wt%)priortoTiO2coating.Thesolutionofgoldnanorods(100mL)waspurifiedbycentrifugationat8000rpmtoremovefreeCTABandsphericalsideproducts,followedbyredispersioninto100mLofdeionizedwater.Hydroxypropylcelluloseso

8、lution(100mL,0.25wt%)wasthenaddedwithovernightstirringtoexchangeCTABonthesurfaceofthegoldnanorodswithhydroxypropylcellulose.Aftercentrifugationat4000rpmtoremovefreehydroxypropylcellulose,thegoldnanorodswereredispersedinto25mLofdeionizedwaterforTiO2co